diff --git a/exercises/00_hello_world/main.cpp b/exercises/00_hello_world/main.cpp index 8866f3c15..444d4d5d9 100644 --- a/exercises/00_hello_world/main.cpp +++ b/exercises/00_hello_world/main.cpp @@ -6,6 +6,6 @@ int main(int argc, char **argv) { // TODO: 在控制台输出 "Hello, InfiniTensor!" 并换行 - std::cout : "Hello, InfiniTensor!" + std::endl; + std::cout << "Hello, InfiniTensor!" << std::endl; return 0; } diff --git a/exercises/01_variable&add/main.cpp b/exercises/01_variable&add/main.cpp index 5014863fd..46bd824ba 100644 --- a/exercises/01_variable&add/main.cpp +++ b/exercises/01_variable&add/main.cpp @@ -4,7 +4,7 @@ int main(int argc, char **argv) { // TODO: 补全变量定义并打印加法运算 - // x ? + auto x{10}; std::cout << x << " + " << x << " = " << x + x << std::endl; return 0; } diff --git a/exercises/02_function/main.cpp b/exercises/02_function/main.cpp index b5eef7f28..be4dcefa3 100644 --- a/exercises/02_function/main.cpp +++ b/exercises/02_function/main.cpp @@ -5,6 +5,7 @@ // NOTICE: 补充由内而外读法的机翻解释 // TODO: 在这里声明函数 +int add(int a, int b); int main(int argc, char **argv) { ASSERT(add(123, 456) == 123 + 456, "add(123, 456) should be 123 + 456"); @@ -16,4 +17,5 @@ int main(int argc, char **argv) { int add(int a, int b) { // TODO: 补全函数定义，但不要移动代码行 + return a + b; } diff --git a/exercises/03_argument¶meter/main.cpp b/exercises/03_argument¶meter/main.cpp index 7fb5d3c2f..0ff2e2d54 100644 --- a/exercises/03_argument¶meter/main.cpp +++ b/exercises/03_argument¶meter/main.cpp @@ -8,19 +8,19 @@ void func(int); // TODO: 为下列 ASSERT 填写正确的值 int main(int argc, char **argv) { auto arg = 99; - ASSERT(arg == ?, "arg should be ?"); + ASSERT(arg == 99, "arg should be 99"); std::cout << "befor func call: " << arg << std::endl; func(arg); - ASSERT(arg == ?, "arg should be ?"); + ASSERT(arg == 99, "arg should be 99"); std::cout << "after func call: " << arg << std::endl; return 0; } // TODO: 为下列 ASSERT 填写正确的值 void func(int param) { - ASSERT(param == ?, "param should be ?"); + ASSERT(param == 99, "param should be 99"); std::cout << "befor add: " << param << std::endl; param += 1; - ASSERT(param == ?, "param should be ?"); + ASSERT(param == 100, "param should be 100"); std::cout << "after add: " << param << std::endl; } diff --git a/exercises/04_static/main.cpp b/exercises/04_static/main.cpp index f107762fa..0a44f7bf2 100644 --- a/exercises/04_static/main.cpp +++ b/exercises/04_static/main.cpp @@ -4,16 +4,16 @@ // THINK: 这个函数的两个 `static` 各自的作用是什么？ static int func(int param) { static int static_ = param; - // std::cout << "static_ = " << static_ << std::endl; + //std::cout << "static_ = " << static_ << std::endl; return static_++; } int main(int argc, char **argv) { // TODO: 将下列 `?` 替换为正确的数字 - ASSERT(func(5) == ?, "static variable value incorrect"); - ASSERT(func(4) == ?, "static variable value incorrect"); - ASSERT(func(3) == ?, "static variable value incorrect"); - ASSERT(func(2) == ?, "static variable value incorrect"); - ASSERT(func(1) == ?, "static variable value incorrect"); + ASSERT(func(5) == 5, "static variable value incorrect"); + ASSERT(func(4) == 6, "static variable value incorrect"); + ASSERT(func(3) == 7, "static variable value incorrect"); + ASSERT(func(2) == 8, "static variable value incorrect"); + ASSERT(func(1) == 9, "static variable value incorrect"); return 0; } diff --git a/exercises/05_constexpr/main.cpp b/exercises/05_constexpr/main.cpp index d1db6c9d8..1f214d8d1 100644 --- a/exercises/05_constexpr/main.cpp +++ b/exercises/05_constexpr/main.cpp @@ -1,14 +1,34 @@ #include "../exercise.h" +// constexpr unsigned long long fibonacci(int i) { +// switch (i) { +// case 0: +// return 0; +// case 1: +// return 1; +// default: +// return fibonacci(i - 1) + fibonacci(i - 2); +// } +// } + constexpr unsigned long long fibonacci(int i) { switch (i) { case 0: return 0; case 1: return 1; - default: - return fibonacci(i - 1) + fibonacci(i - 2); } + + unsigned long long fib_1 = 0; + unsigned long long fib_2 = 1; + unsigned long long fib_i = 0; + for (int j = 2; j <= i; ++j) { + fib_i = fib_1 + fib_2; + fib_1 = fib_2; + fib_2 = fib_i; + } + return fib_i; + } int main(int argc, char **argv) { diff --git a/exercises/06_array/main.cpp b/exercises/06_array/main.cpp index 61ed99ec0..0bdb0df15 100644 --- a/exercises/06_array/main.cpp +++ b/exercises/06_array/main.cpp @@ -11,13 +11,13 @@ unsigned long long fibonacci(int i) { return 1; default: // TODO: 补全三目表达式缺失的部分 - return ? : (arr[i] = fibonacci(i - 1) + fibonacci(i - 2)); + return (arr[i] != 0) ? (arr[i]) : (arr[i] = fibonacci(i - 1) + fibonacci(i - 2)); } } int main(int argc, char **argv) { // TODO: 为此 ASSERT 填写正确的值 - ASSERT(sizeof(arr) == ?, "sizeof array is size of all its elements"); + ASSERT(sizeof(arr) == 720, "sizeof array is size of all its elements"); // ---- 不要修改以下代码 ---- ASSERT(fibonacci(2) == 1, "fibonacci(2) should be 1"); ASSERT(fibonacci(20) == 6765, "fibonacci(20) should be 6765"); diff --git a/exercises/07_loop/main.cpp b/exercises/07_loop/main.cpp index 44fd835cd..fd8f86c99 100644 --- a/exercises/07_loop/main.cpp +++ b/exercises/07_loop/main.cpp @@ -5,9 +5,10 @@ // READ: 纯函数 static unsigned long long fibonacci(int i) { // TODO: 为缓存设置正确的初始值 - static unsigned long long cache[96], cached; + static unsigned long long cache[96] {0, 1}; + static unsigned long long cached{2}; // TODO: 设置正确的循环条件 - for (; false; ++cached) { + for (; cached <= i ; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; diff --git a/exercises/08_pointer/main.cpp b/exercises/08_pointer/main.cpp index ba37173f5..a17102810 100644 --- a/exercises/08_pointer/main.cpp +++ b/exercises/08_pointer/main.cpp @@ -1,11 +1,22 @@ #include "../exercise.h" +#include // READ: 数组向指针退化 bool is_fibonacci(int *ptr, int len, int stride) { ASSERT(len >= 3, "`len` should be at least 3"); // TODO: 编写代码判断从 ptr 开始，每 stride 个元素取 1 个元素，组成长度为 n 的数列是否满足 // arr[i + 2] = arr[i] + arr[i + 1] + int* arr = new int[len]; + for(int i = 0; i < len; i++) { + arr[i] = *(ptr + (i * stride)); + } + //for(int i = 0; i < len; i++) { std::cout << arr[i] <<", "; } + //std::cout << "----------------" << std::endl; + for(int i = 2; i < len; i++) { + if(arr[i] != arr[i - 1] + arr[i -2]) { return false; } + } return true; + delete[] arr; } // ---- 不要修改以下代码 ---- diff --git a/exercises/09_enum&union/main.cpp b/exercises/09_enum&union/main.cpp index 3f2cec768..ead91762d 100644 --- a/exercises/09_enum&union/main.cpp +++ b/exercises/09_enum&union/main.cpp @@ -37,7 +37,7 @@ ColorEnum convert_by_pun(Color c) { TypePun pun; // TODO: 补全类型双关转换 - + pun.c = c; return pun.e; } diff --git a/exercises/10_trivial/main.cpp b/exercises/10_trivial/main.cpp index 6ba23e48e..a421e638c 100644 --- a/exercises/10_trivial/main.cpp +++ b/exercises/10_trivial/main.cpp @@ -9,8 +9,8 @@ struct FibonacciCache { // TODO: 实现正确的缓存优化斐波那契计算 static unsigned long long fibonacci(FibonacciCache &cache, int i) { - for (; false; ++cached) { - cache[cached] = cache[cached - 1] + cache[cached - 2]; + for (; cache.cached <= i; ++cache.cached) { + cache.cache[cache.cached] = cache.cache[cache.cached - 1] + cache.cache[cache.cached - 2]; } return cache.cache[i]; } @@ -19,7 +19,7 @@ int main(int argc, char **argv) { // TODO: 初始化缓存结构体，使计算正确 // NOTICE: C/C++ 中，读取未初始化的变量（包括结构体变量）是未定义行为 // READ: 初始化的各种写法 - FibonacciCache fib; + FibonacciCache fib{{0, 1}, 2}; ASSERT(fibonacci(fib, 10) == 55, "fibonacci(10) should be 55"); std::cout << "fibonacci(10) = " << fibonacci(fib, 10) << std::endl; return 0; diff --git a/exercises/11_method/main.cpp b/exercises/11_method/main.cpp index 0e08e0a36..eab225933 100644 --- a/exercises/11_method/main.cpp +++ b/exercises/11_method/main.cpp @@ -6,7 +6,7 @@ struct Fibonacci { // TODO: 实现正确的缓存优化斐波那契计算 unsigned long long get(int i) { - for (; false; ++cached) { + for (; cached <= i; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; @@ -15,7 +15,7 @@ struct Fibonacci { int main(int argc, char **argv) { // TODO: 初始化缓存结构体，使计算正确 - Fibonacci fib; + Fibonacci fib{{0, 1}, 2}; ASSERT(fib.get(10) == 55, "fibonacci(10) should be 55"); std::cout << "fibonacci(10) = " << fib.get(10) << std::endl; return 0; diff --git a/exercises/12_method_const/main.cpp b/exercises/12_method_const/main.cpp index 5521be4da..65c079be1 100644 --- a/exercises/12_method_const/main.cpp +++ b/exercises/12_method_const/main.cpp @@ -5,7 +5,8 @@ struct Fibonacci { int numbers[11]; // TODO: 修改方法签名和实现，使测试通过 - int get(int i) { + int get(int i) const { + return numbers[i]; } }; diff --git a/exercises/13_class/main.cpp b/exercises/13_class/main.cpp index 9afa98c5b..64cb330b8 100644 --- a/exercises/13_class/main.cpp +++ b/exercises/13_class/main.cpp @@ -14,11 +14,11 @@ class Fibonacci { public: // TODO: 实现构造器 - // Fibonacci() + Fibonacci() : cache{0, 1}, cached(2) {} // TODO: 实现正确的缓存优化斐波那契计算 size_t get(int i) { - for (; false; ++cached) { + for (; cached <= i; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; diff --git a/exercises/14_class_destruct/main.cpp b/exercises/14_class_destruct/main.cpp index 42150e8ca..bc6d4a6f1 100644 --- a/exercises/14_class_destruct/main.cpp +++ b/exercises/14_class_destruct/main.cpp @@ -11,14 +11,19 @@ class DynFibonacci { public: // TODO: 实现动态设置容量的构造器 - DynFibonacci(int capacity): cache(new ?), cached(?) {} + DynFibonacci(int capacity): cache(new size_t[capacity]{0, 1}), cached(2) {} // TODO: 实现析构器，释放缓存空间 - ~DynFibonacci(); + ~DynFibonacci() + { + if (cache != nullptr) { + delete[] cache; + } + } // TODO: 实现正确的缓存优化斐波那契计算 size_t get(int i) { - for (; false; ++cached) { + for (; cached <= i; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; diff --git a/exercises/15_class_clone/main.cpp b/exercises/15_class_clone/main.cpp index f74b70391..b81e86c5a 100644 --- a/exercises/15_class_clone/main.cpp +++ b/exercises/15_class_clone/main.cpp @@ -1,4 +1,5 @@ #include "../exercise.h" +#include // READ: 复制构造函数 // READ: 函数定义（显式弃置） @@ -10,17 +11,26 @@ class DynFibonacci { public: // TODO: 实现动态设置容量的构造器 - DynFibonacci(int capacity): cache(new ?), cached(?) {} + DynFibonacci(int capacity): cache{new size_t[capacity]{0, 1}}, cached{2} {} // TODO: 实现复制构造器 - DynFibonacci(DynFibonacci const &) = delete; + DynFibonacci(DynFibonacci const & other): cache{new size_t[other.cached * sizeof(size_t)]} + { + cached = other.cached; + memcpy(cache, other.cache, other.cached * sizeof(size_t)); + } // TODO: 实现析构器，释放缓存空间 - ~DynFibonacci(); + ~DynFibonacci() + { + if (cache != nullptr) { + delete[] cache; + } + } // TODO: 实现正确的缓存优化斐波那契计算 size_t get(int i) { - for (; false; ++cached) { + for (; cached <= i; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; diff --git a/exercises/16_class_move/main.cpp b/exercises/16_class_move/main.cpp index 8d2c421da..c59ecb02c 100644 --- a/exercises/16_class_move/main.cpp +++ b/exercises/16_class_move/main.cpp @@ -15,21 +15,39 @@ class DynFibonacci { public: // TODO: 实现动态设置容量的构造器 - DynFibonacci(int capacity): cache(new ?), cached(?) {} + DynFibonacci(int capacity): cache{new size_t[capacity]{0, 1}}, cached{2} {} // TODO: 实现移动构造器 - DynFibonacci(DynFibonacci &&) noexcept = delete; + DynFibonacci(DynFibonacci &&other) noexcept + { + cache = other.cache; + cached = other.cached; + other.cache = nullptr; + } // TODO: 实现移动赋值 // NOTICE: ⚠ 注意移动到自身问题 ⚠ - DynFibonacci &operator=(DynFibonacci &&) noexcept = delete; + DynFibonacci &operator=(DynFibonacci &&other) noexcept + { + if (&other != this){ + cache = other.cache; + cached = other.cached; + other.cache = nullptr; + } + return *this; + } // TODO: 实现析构器，释放缓存空间 - ~DynFibonacci(); + ~DynFibonacci() + { + if (cache != nullptr) { + delete[] cache; + } + } // TODO: 实现正确的缓存优化斐波那契计算 size_t operator[](int i) { - for (; false; ++cached) { + for (; cached <=i; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; diff --git a/exercises/17_class_derive/main.cpp b/exercises/17_class_derive/main.cpp index 819ae72fc..0c245df4f 100644 --- a/exercises/17_class_derive/main.cpp +++ b/exercises/17_class_derive/main.cpp @@ -50,9 +50,9 @@ int main(int argc, char **argv) { B b = B(3); // TODO: 补全三个类型的大小 - static_assert(sizeof(X) == ?, "There is an int in X"); - static_assert(sizeof(A) == ?, "There is an int in A"); - static_assert(sizeof(B) == ?, "B is an A with an X"); + static_assert(sizeof(X) == 4, "There is an int in X"); + static_assert(sizeof(A) == 4, "There is an int in A"); + static_assert(sizeof(B) == 8, "B is an A with an X"); i = 0; std::cout << std::endl diff --git a/exercises/18_class_virtual/main.cpp b/exercises/18_class_virtual/main.cpp index ac6382413..344709e4c 100644 --- a/exercises/18_class_virtual/main.cpp +++ b/exercises/18_class_virtual/main.cpp @@ -42,38 +42,38 @@ int main(int argc, char **argv) { C c; D d; - ASSERT(a.virtual_name() == '?', MSG); - ASSERT(b.virtual_name() == '?', MSG); - ASSERT(c.virtual_name() == '?', MSG); - ASSERT(d.virtual_name() == '?', MSG); - ASSERT(a.direct_name() == '?', MSG); - ASSERT(b.direct_name() == '?', MSG); - ASSERT(c.direct_name() == '?', MSG); - ASSERT(d.direct_name() == '?', MSG); + ASSERT(a.virtual_name() == 'A', MSG); + ASSERT(b.virtual_name() == 'B', MSG); + ASSERT(c.virtual_name() == 'C', MSG); + ASSERT(d.virtual_name() == 'C', MSG); + ASSERT(a.direct_name() == 'A', MSG); + ASSERT(b.direct_name() == 'B', MSG); + ASSERT(c.direct_name() == 'C', MSG); + ASSERT(d.direct_name() == 'D', MSG); A &rab = b; B &rbc = c; C &rcd = d; - ASSERT(rab.virtual_name() == '?', MSG); - ASSERT(rbc.virtual_name() == '?', MSG); - ASSERT(rcd.virtual_name() == '?', MSG); - ASSERT(rab.direct_name() == '?', MSG); - ASSERT(rbc.direct_name() == '?', MSG); - ASSERT(rcd.direct_name() == '?', MSG); + ASSERT(rab.virtual_name() == 'B', MSG); + ASSERT(rbc.virtual_name() == 'C', MSG); + ASSERT(rcd.virtual_name() == 'C', MSG); + ASSERT(rab.direct_name() == 'A', MSG); + ASSERT(rbc.direct_name() == 'B', MSG); + ASSERT(rcd.direct_name() == 'C', MSG); A &rac = c; B &rbd = d; - ASSERT(rac.virtual_name() == '?', MSG); - ASSERT(rbd.virtual_name() == '?', MSG); - ASSERT(rac.direct_name() == '?', MSG); - ASSERT(rbd.direct_name() == '?', MSG); + ASSERT(rac.virtual_name() == 'C', MSG); + ASSERT(rbd.virtual_name() == 'C', MSG); + ASSERT(rac.direct_name() == 'A', MSG); + ASSERT(rbd.direct_name() == 'B', MSG); A &rad = d; - ASSERT(rad.virtual_name() == '?', MSG); - ASSERT(rad.direct_name() == '?', MSG); + ASSERT(rad.virtual_name() == 'C', MSG); + ASSERT(rad.direct_name() == 'A', MSG); return 0; } diff --git a/exercises/19_class_virtual_destruct/main.cpp b/exercises/19_class_virtual_destruct/main.cpp index cdd54f74f..dc5dbeb5a 100644 --- a/exercises/19_class_virtual_destruct/main.cpp +++ b/exercises/19_class_virtual_destruct/main.cpp @@ -5,12 +5,12 @@ struct A { // TODO: 正确初始化静态字段 - static int num_a = 0; + static int num_a; A() { ++num_a; } - ~A() { + virtual ~A() { --num_a; } @@ -18,9 +18,12 @@ struct A { return 'A'; } }; + +int A::num_a = 0; + struct B final : public A { // TODO: 正确初始化静态字段 - static int num_b = 0; + static int num_b; B() { ++num_b; @@ -34,13 +37,15 @@ struct B final : public A { } }; +int B::num_b = 0; + int main(int argc, char **argv) { auto a = new A; auto b = new B; - ASSERT(A::num_a == ?, "Fill in the correct value for A::num_a"); - ASSERT(B::num_b == ?, "Fill in the correct value for B::num_b"); - ASSERT(a->name() == '?', "Fill in the correct value for a->name()"); - ASSERT(b->name() == '?', "Fill in the correct value for b->name()"); + ASSERT(A::num_a == 2, "Fill in the correct value for A::num_a"); + ASSERT(B::num_b == 1, "Fill in the correct value for B::num_b"); + ASSERT(a->name() == 'A', "Fill in the correct value for a->name()"); + ASSERT(b->name() == 'B', "Fill in the correct value for b->name()"); delete a; delete b; @@ -48,14 +53,14 @@ int main(int argc, char **argv) { ASSERT(B::num_b == 0, "Every B was destroyed"); A *ab = new B;// 派生类指针可以随意转换为基类指针 - ASSERT(A::num_a == ?, "Fill in the correct value for A::num_a"); - ASSERT(B::num_b == ?, "Fill in the correct value for B::num_b"); - ASSERT(ab->name() == '?', "Fill in the correct value for ab->name()"); + ASSERT(A::num_a == 1, "Fill in the correct value for A::num_a"); + ASSERT(B::num_b == 1, "Fill in the correct value for B::num_b"); + ASSERT(ab->name() == 'B', "Fill in the correct value for ab->name()"); // TODO: 基类指针无法随意转换为派生类指针，补全正确的转换语句 - B &bb = *ab; - ASSERT(bb.name() == '?', "Fill in the correct value for bb->name()"); - + B &bb = *(static_cast(ab)); + ASSERT(bb.name() == 'B', "Fill in the correct value for bb->name()"); + // TODO: ---- 以下代码不要修改，通过改正类定义解决编译问题 ---- delete ab;// 通过指针可以删除指向的对象，即使是多态对象 ASSERT(A::num_a == 0, "Every A was destroyed"); diff --git a/exercises/20_function_template/main.cpp b/exercises/20_function_template/main.cpp index cb6d978d3..2991de080 100644 --- a/exercises/20_function_template/main.cpp +++ b/exercises/20_function_template/main.cpp @@ -2,8 +2,17 @@ // READ: 函数模板 // TODO: 将这个函数模板化 -int plus(int a, int b) { - return a + b; +// int plus(int a, int b) { +// return a + b; +// } +template +T plus(T a, T b) { + return (a + b); +} + +template +bool float_equals(T a, T b, T epsilon = 1e-9) { + return std::labs(a - b) < epsilon; } int main(int argc, char **argv) { @@ -14,7 +23,16 @@ int main(int argc, char **argv) { ASSERT(plus(1.25f, 2.5f) == 3.75f, "Plus two float"); ASSERT(plus(1.25, 2.5) == 3.75, "Plus two double"); // TODO: 修改判断条件使测试通过 - ASSERT(plus(0.1, 0.2) == 0.3, "How to make this pass?"); + ASSERT(float_equals(plus(0.1, 0.2), 0.3), "How to make this pass?"); return 0; } + +/* +plus(0.1, 0.2) == 0.3 断言失败的根本原因是：浮点数（double/float）的二进制存储存在精度损失——0.1 和 0.2 无法被二进制浮点数精确表示， +相加后的结果并非严格等于 0.3（实际是 0.30000000000000004 左右）。 + +浮点数判等的核心规则： +✅ 可直接用 ==：能被二进制精确表示的浮点数（如 0.5/1.25/3.75，分母是 2 的幂）； +❌ 必须用差值判断：无法被二进制精确表示的浮点数（如 0.1/0.2/0.3，分母含 2 以外的质因数）。 +*/ \ No newline at end of file diff --git a/exercises/21_runtime_datatype/main.cpp b/exercises/21_runtime_datatype/main.cpp index 9c4bf376a..96c174936 100644 --- a/exercises/21_runtime_datatype/main.cpp +++ b/exercises/21_runtime_datatype/main.cpp @@ -17,14 +17,27 @@ struct TaggedUnion { }; }; -// TODO: 将这个函数模板化用于 sigmoid_dyn -float sigmoid(float x) { +// // TODO: 将这个函数模板化用于 sigmoid_dyn +// float sigmoid(float x) { +// return 1 / (1 + std::exp(-x)); +// } + +template +T sigmoid(T x) { return 1 / (1 + std::exp(-x)); } TaggedUnion sigmoid_dyn(TaggedUnion x) { TaggedUnion ans{x.type}; // TODO: 根据 type 调用 sigmoid + if (x.type == DataType::Float) + { + ans.f = sigmoid(x.f); + } + if (x.type == DataType::Double) + { + ans.d = sigmoid(x.d); + } return ans; } diff --git a/exercises/22_class_template/main.cpp b/exercises/22_class_template/main.cpp index d4985d904..6f656e236 100644 --- a/exercises/22_class_template/main.cpp +++ b/exercises/22_class_template/main.cpp @@ -1,6 +1,7 @@ #include "../exercise.h" #include // READ: 类模板 +#include template struct Tensor4D { @@ -10,6 +11,10 @@ struct Tensor4D { Tensor4D(unsigned int const shape_[4], T const *data_) { unsigned int size = 1; // TODO: 填入正确的 shape 并计算 size + for (int i = 0; i < 4; ++i) { + shape[i] = shape_[i]; + size *= shape[i]; + } data = new T[size]; std::memcpy(data, data_, size * sizeof(T)); } @@ -21,15 +26,53 @@ struct Tensor4D { Tensor4D(Tensor4D const &) = delete; Tensor4D(Tensor4D &&) noexcept = delete; + unsigned int GetIndex(unsigned int index_0, unsigned int index_1, unsigned int index_2, unsigned int index_3) const + { + return index_0 * shape[1] * shape[2] * shape[3] + + index_1 * shape[2] * shape[3] + + index_2 * shape[3] + + index_3; + } + + // 这个加法需要支持“单向广播”。 // 具体来说，`others` 可以具有与 `this` 不同的形状，形状不同的维度长度必须为 1。 // `others` 长度为 1 但 `this` 长度不为 1 的维度将发生广播计算。 // 例如，`this` 形状为 `[1, 2, 3, 4]`，`others` 形状为 `[1, 2, 1, 4]`， // 则 `this` 与 `others` 相加时，3 个形状为 `[1, 2, 1, 4]` 的子张量各自与 `others` 对应项相加。 - Tensor4D &operator+=(Tensor4D const &others) { + Tensor4D &operator+=(Tensor4D const &others) { // TODO: 实现单向广播的加法 + for (int i = 0; i < 4; ++i) { + if (others.shape[i] != 1 && others.shape[i] != shape[i]) { + ASSERT(false, "Invalid shape for broadcasting: dimension " + std::to_string(i) + " mismatch"); + } + } + + for (unsigned int index0 = 0; index0 < shape[0]; ++index0) { + unsigned int other_index0 = (others.shape[0] == 1) ? 0 : index0; + for (unsigned int index1 = 0; index1 < shape[1]; ++index1) { + unsigned int other_index1 = (others.shape[1] == 1) ? 0 : index1; + for(unsigned int index2 = 0; index2 < shape[2]; ++index2) { + unsigned int other_index2 = (others.shape[2] == 1) ? 0 : index2; + for(unsigned int index3 = 0; index3 < shape[3]; ++index3) { + unsigned int other_index3 = (others.shape[3] == 1) ? 0 : index3; + + unsigned int index = GetIndex(index0, index1, index2, index3); + unsigned int other_index = others.GetIndex(other_index0, other_index1, other_index2, other_index3); + //std::cout << index << "----" << other_index << std::endl; + + data[index] += others.data[other_index]; + } + } + } + } return *this; - } + } + + // Tensor4D &operator+=(Tensor4D const &others) { + // // TODO: 实现单向广播的加法 + // return *this; + // } }; // ---- 不要修改以下代码 ---- @@ -53,6 +96,7 @@ int main(int argc, char **argv) { ASSERT(t0.data[i] == data[i] * 2, "Tensor doubled by plus its self."); } } + std::cout << "---------------------------------" << std::endl; { unsigned int s0[]{1, 2, 3, 4}; // clang-format off @@ -81,9 +125,11 @@ int main(int argc, char **argv) { auto t1 = Tensor4D(s1, d1); t0 += t1; for (auto i = 0u; i < sizeof(d0) / sizeof(*d0); ++i) { + // std::cout << t0.data[i] < arr{{1, 2, 3, 4, 5}}; - ASSERT(arr.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(arr) == ?, "Fill in the correct value."); + ASSERT(arr.size() == 5, "Fill in the correct value."); + ASSERT(sizeof(arr) == 20, "Fill in the correct value."); int ans[]{1, 2, 3, 4, 5}; - ASSERT(std::memcmp(arr.?, ans, ?) == 0, "Fill in the correct values."); + ASSERT(std::memcmp(arr.data(), ans, sizeof(arr)) == 0, "Fill in the correct values."); } { std::array arr; - ASSERT(arr.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(arr) == ?, "Fill in the correct value."); + ASSERT(arr.size() == 8, "Fill in the correct value."); + ASSERT(sizeof(arr) == 64, "Fill in the correct value."); } { std::array arr{"Hello, InfiniTensor!"}; - ASSERT(arr.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(arr) == ?, "Fill in the correct value."); - ASSERT(std::strcmp(arr.?, "Hello, InfiniTensor!") == 0, "Fill in the correct value."); + ASSERT(arr.size() == 21, "Fill in the correct value."); + ASSERT(sizeof(arr) == 21, "Fill in the correct value."); + ASSERT(std::strcmp(arr.data(), "Hello, InfiniTensor!") == 0, "Fill in the correct value."); } return 0; } diff --git a/exercises/25_std_vector/main.cpp b/exercises/25_std_vector/main.cpp index f9e41bb78..38fd67590 100644 --- a/exercises/25_std_vector/main.cpp +++ b/exercises/25_std_vector/main.cpp @@ -8,81 +8,81 @@ int main(int argc, char **argv) { { std::vector vec{1, 2, 3, 4, 5}; - ASSERT(vec.size() == ?, "Fill in the correct value."); + ASSERT(vec.size() == 5, "Fill in the correct value."); // THINK: `std::vector` 的大小是什么意思？与什么有关？ - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); int ans[]{1, 2, 3, 4, 5}; - ASSERT(std::memcmp(vec.?, ans, sizeof(ans)) == 0, "Fill in the correct values."); + ASSERT(std::memcmp(vec.data(), ans, sizeof(ans)) == 0, "Fill in the correct values."); } { std::vector vec{1, 2, 3, 4, 5}; { - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(vec.size() == 5, "Fill in the correct value."); + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); double ans[]{1, 2, 3, 4, 5}; - ASSERT(std::memcmp(vec.?, ans, sizeof(ans)) == 0, "Fill in the correct values."); + ASSERT(std::memcmp(vec.data(), ans, sizeof(ans)) == 0, "Fill in the correct values."); } { vec.push_back(6); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(vec.size() == 6, "Fill in the correct value."); + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); vec.pop_back(); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(vec.size() == 5, "Fill in the correct value."); + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); } { vec[4] = 6; - ASSERT(vec[0] == ?, "Fill in the correct value."); - ASSERT(vec[1] == ?, "Fill in the correct value."); - ASSERT(vec[2] == ?, "Fill in the correct value."); - ASSERT(vec[3] == ?, "Fill in the correct value."); - ASSERT(vec[4] == ?, "Fill in the correct value."); + ASSERT(vec[0] == 1, "Fill in the correct value."); + ASSERT(vec[1] == 2, "Fill in the correct value."); + ASSERT(vec[2] == 3, "Fill in the correct value."); + ASSERT(vec[3] == 4, "Fill in the correct value."); + ASSERT(vec[4] == 6, "Fill in the correct value."); } { // THINK: `std::vector` 插入删除的时间复杂度是什么？ - vec.insert(?, 1.5); + vec.insert(vec.begin() + 1, 1.5); ASSERT((vec == std::vector{1, 1.5, 2, 3, 4, 6}), "Make this assertion pass."); - vec.erase(?); + vec.erase(vec.begin()+ 3); ASSERT((vec == std::vector{1, 1.5, 2, 4, 6}), "Make this assertion pass."); } { vec.shrink_to_fit(); - ASSERT(vec.capacity() == ?, "Fill in the correct value."); + ASSERT(vec.capacity() == 5, "Fill in the correct value."); vec.clear(); ASSERT(vec.empty(), "`vec` is empty now."); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(vec.capacity() == ?, "Fill in the correct value."); + ASSERT(vec.size() == 0, "Fill in the correct value."); + ASSERT(vec.capacity() == 5, "Fill in the correct value."); } } { - std::vector vec(?, ?); // TODO: 调用正确的构造函数 + std::vector vec(48, 'z'); // TODO: 调用正确的构造函数 ASSERT(vec[0] == 'z', "Make this assertion pass."); ASSERT(vec[47] == 'z', "Make this assertion pass."); ASSERT(vec.size() == 48, "Make this assertion pass."); - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); { auto capacity = vec.capacity(); vec.resize(16); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(vec.capacity() == ?, "Fill in a correct identifier."); + ASSERT(vec.size() == 16, "Fill in the correct value."); + ASSERT(vec.capacity() == 48, "Fill in a correct identifier."); } { vec.reserve(256); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(vec.capacity() == ?, "Fill in the correct value."); + ASSERT(vec.size() == 16, "Fill in the correct value."); + ASSERT(vec.capacity() == 256, "Fill in the correct value."); } { vec.push_back('a'); vec.push_back('b'); vec.push_back('c'); vec.push_back('d'); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(vec.capacity() == ?, "Fill in the correct value."); - ASSERT(vec[15] == ?, "Fill in the correct value."); - ASSERT(vec[?] == 'a', "Fill in the correct value."); - ASSERT(vec[?] == 'b', "Fill in the correct value."); - ASSERT(vec[?] == 'c', "Fill in the correct value."); - ASSERT(vec[?] == 'd', "Fill in the correct value."); + ASSERT(vec.size() == 20, "Fill in the correct value."); + ASSERT(vec.capacity() == 256, "Fill in the correct value."); + ASSERT(vec[15] == 'z', "Fill in the correct value."); + ASSERT(vec[16] == 'a', "Fill in the correct value."); + ASSERT(vec[17] == 'b', "Fill in the correct value."); + ASSERT(vec[18] == 'c', "Fill in the correct value."); + ASSERT(vec[19] == 'd', "Fill in the correct value."); } } diff --git a/exercises/26_std_vector_bool/main.cpp b/exercises/26_std_vector_bool/main.cpp index b4ab4f9c4..972a80b08 100644 --- a/exercises/26_std_vector_bool/main.cpp +++ b/exercises/26_std_vector_bool/main.cpp @@ -6,29 +6,29 @@ // TODO: 将下列 `?` 替换为正确的代码 int main(int argc, char **argv) { - std::vector vec(?, ?);// TODO: 正确调用构造函数 + std::vector vec(100, true);// TODO: 正确调用构造函数 ASSERT(vec[0], "Make this assertion pass."); ASSERT(vec[99], "Make this assertion pass."); ASSERT(vec.size() == 100, "Make this assertion pass."); // NOTICE: 平台相关！注意 CI:Ubuntu 上的值。 std::cout << "sizeof(std::vector) = " << sizeof(std::vector) << std::endl; - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(sizeof(vec) == sizeof(std::vector), "Fill in the correct value."); { vec[20] = false; - ASSERT(?vec[20], "Fill in `vec[20]` or `!vec[20]`."); + ASSERT(!vec[20], "Fill in `vec[20]` or `!vec[20]`."); } { vec.push_back(false); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(?vec[100], "Fill in `vec[100]` or `!vec[100]`."); + ASSERT(vec.size() == 101, "Fill in the correct value."); + ASSERT(!vec[100], "Fill in `vec[100]` or `!vec[100]`."); } { auto ref = vec[30]; - ASSERT(?ref, "Fill in `ref` or `!ref`"); + ASSERT(ref, "Fill in `ref` or `!ref`"); ref = false; - ASSERT(?ref, "Fill in `ref` or `!ref`"); + ASSERT(!ref, "Fill in `ref` or `!ref`"); // THINK: WHAT and WHY? - ASSERT(?vec[30], "Fill in `vec[30]` or `!vec[30]`."); + ASSERT(!vec[30], "Fill in `vec[30]` or `!vec[30]`."); } return 0; } diff --git a/exercises/27_strides/main.cpp b/exercises/27_strides/main.cpp index baceaf2a9..b9d16b8f2 100644 --- a/exercises/27_strides/main.cpp +++ b/exercises/27_strides/main.cpp @@ -14,15 +14,23 @@ using udim = unsigned int; /// @param shape 张量的形状 /// @return 张量每维度的访问步长 std::vector strides(std::vector const &shape) { - std::vector strides(shape.size()); + std::vector strides(shape.size(), 1); // TODO: 完成函数体，根据张量形状计算张量连续存储时的步长。 // READ: 逆向迭代器 std::vector::rbegin // 使用逆向迭代器可能可以简化代码 + strides[shape.size() - 1] = 1; + for (int i = shape.size() - 2; i >= 0; i--) { + strides[i] = strides[i + 1] * shape[i + 1]; + } return strides; } // ---- 不要修改以下代码 ---- int main(int argc, char **argv) { + auto test = strides({2, 3, 4}); + for(const auto &i : test){ + std::cout << i << " "; + } ASSERT((strides({2, 3, 4}) == std::vector{12, 4, 1}), "Make this assertion pass."); ASSERT((strides({3, 4, 5}) == std::vector{20, 5, 1}), "Make this assertion pass."); ASSERT((strides({1, 3, 224, 224}) == std::vector{150528, 50176, 224, 1}), "Make this assertion pass."); diff --git a/exercises/28_std_string/main.cpp b/exercises/28_std_string/main.cpp index d8b276274..5fcfdf31d 100644 --- a/exercises/28_std_string/main.cpp +++ b/exercises/28_std_string/main.cpp @@ -10,9 +10,9 @@ int main(int argc, char **argv) { auto world = "world"; // READ: `decltype` 表达式 // READ: `std::is_same_v` 元编程判别 - ASSERT((std::is_same_v), "Fill in the missing type."); - ASSERT((std::is_same_v), "Fill in the missing type."); + ASSERT((std::is_same_v), "Fill in the missing type."); + ASSERT((std::is_same_v), "Fill in the missing type."); // TODO: 将 `?` 替换为正确的字符串 - ASSERT(hello + ", " + world + '!' == "?", "Fill in the missing string."); + ASSERT(hello + ", " + world + '!' == "Hello, world!", "Fill in the missing string."); return 0; } diff --git a/exercises/29_std_map/main.cpp b/exercises/29_std_map/main.cpp index fcccca347..e53a4bfd0 100644 --- a/exercises/29_std_map/main.cpp +++ b/exercises/29_std_map/main.cpp @@ -7,11 +7,16 @@ template bool key_exists(std::map const &map, k const &key) { // TODO: 实现函数 + if (map.find(key) != map.end()) { + return true; + } + return false; } template void set(std::map &map, k key, v value) { // TODO: 实现函数 + map[key] = value; } // ---- 不要修改以下代码 ---- diff --git a/exercises/30_std_unique_ptr/main.cpp b/exercises/30_std_unique_ptr/main.cpp index 9b98b5794..e5202854f 100644 --- a/exercises/30_std_unique_ptr/main.cpp +++ b/exercises/30_std_unique_ptr/main.cpp @@ -39,7 +39,7 @@ int main(int argc, char **argv) { std::vector problems[3]; drop(forward(reset(nullptr))); - problems[0] = std::move(RECORDS); + problems[0] = std::move(RECORDS); forward(drop(reset(forward(forward(reset(nullptr)))))); problems[1] = std::move(RECORDS); @@ -49,12 +49,20 @@ int main(int argc, char **argv) { // ---- 不要修改以上代码 ---- + // std::vector answers[]{ + // {"fd"}, + // // TODO: 分析 problems[1] 中资源的生命周期，将记录填入 `std::vector` + // // NOTICE: 此题结果依赖对象析构逻辑，平台相关，提交时以 CI 实际运行平台为准 + // {"ffr", "d"}, + // {"r", "d", "d"}, + // }; + std::vector answers[]{ {"fd"}, // TODO: 分析 problems[1] 中资源的生命周期，将记录填入 `std::vector` // NOTICE: 此题结果依赖对象析构逻辑，平台相关，提交时以 CI 实际运行平台为准 - {"", "", "", "", "", "", "", ""}, - {"", "", "", "", "", "", "", ""}, + {"d", "ffr"}, + {"d", "d", "r"}, }; // ---- 不要修改以下代码 ---- diff --git a/exercises/31_std_shared_ptr/main.cpp b/exercises/31_std_shared_ptr/main.cpp index febbbcc6f..5de48429b 100644 --- a/exercises/31_std_shared_ptr/main.cpp +++ b/exercises/31_std_shared_ptr/main.cpp @@ -10,36 +10,39 @@ int main(int argc, char **argv) { std::shared_ptr ptrs[]{shared, shared, shared}; std::weak_ptr observer = shared; - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 4, ""); ptrs[0].reset(); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 3, ""); ptrs[1] = nullptr; - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 2, ""); ptrs[2] = std::make_shared(*shared); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 1, ""); ptrs[0] = shared; ptrs[1] = shared; ptrs[2] = std::move(shared); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 3, ""); - std::ignore = std::move(ptrs[0]); + std::ignore = std::move(ptrs[0]); //opt + //std::cout << "observer: " << observer.use_count() << std::endl; ptrs[1] = std::move(ptrs[1]); + //std::cout << "observer: " << observer.use_count() << std::endl; ptrs[1] = std::move(ptrs[2]); - ASSERT(observer.use_count() == ?, ""); + //std::cout << "observer: " << observer.use_count() << std::endl; + ASSERT(observer.use_count() == 2, ""); shared = observer.lock(); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 3, ""); shared = nullptr; for (auto &ptr : ptrs) ptr = nullptr; - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 0, ""); shared = observer.lock(); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 0, ""); return 0; } diff --git a/exercises/32_std_transform/main.cpp b/exercises/32_std_transform/main.cpp index f4dc25a5c..42d8cab72 100644 --- a/exercises/32_std_transform/main.cpp +++ b/exercises/32_std_transform/main.cpp @@ -9,7 +9,8 @@ int main(int argc, char **argv) { std::vector val{8, 13, 21, 34, 55}; // TODO: 调用 `std::transform`，将 `v` 中的每个元素乘以 2，并转换为字符串，存入 `ans` - // std::vector ans + std::vector ans; + std::transform(val.begin(), val.end(), std::back_inserter(ans), [](int i) { return std::to_string(i * 2); }); ASSERT(ans.size() == val.size(), "ans size should be equal to val size"); ASSERT(ans[0] == "16", "ans[0] should be 16"); ASSERT(ans[1] == "26", "ans[1] should be 26"); diff --git a/exercises/33_std_accumulate/main.cpp b/exercises/33_std_accumulate/main.cpp index 6326929d5..68d3bc0f5 100644 --- a/exercises/33_std_accumulate/main.cpp +++ b/exercises/33_std_accumulate/main.cpp @@ -11,7 +11,8 @@ int main(int argc, char **argv) { // - 形状为 shape； // - 连续存储； // 的张量占用的字节数 - // int size = + int size = std::accumulate(std::begin(shape), std::end(shape), sizeof(float), std::multiplies()); + //std::cout << size << std::endl; ASSERT(size == 602112, "4x1x3x224x224 = 602112"); return 0; }