FERTIG

Author: Torben

.gitignore

@@ -26,3 +26,4 @@
 *.exe
 *.out
 *.app
+/Debug/

src/String.cpp

@@ -16,26 +16,60 @@ String::String(char c) {
 	str[1] = '\0';
 }
 
-String::String(const char *s) {
-	// TODO
+String::String(const char* s) {
+	size = 0;
+	const char* temp = s;
+	while (*temp != '\0') {
+		size++;
+		temp++;
+	}
+	str = new char[size + 1];
+	for (int i = 0; i < size; i++) {
+		str[i] = s[i];
+	}
+	str[size] = '\0';
 }
 
 String::String(const String& s) {
-	// TODO
+	size = s.size;
+	str = new char[size + 1];
+	for (int i = 0; i < size; i++) {
+		str[i] = s.str[i];
+	}
+	str[size] = '\0';
 }
 
 String::~String() {
 	delete[] str;
 }
 
 char& String::operator[](int index) {
-	// TODO
+	return str[index];
 }
 
 String& String::operator=(String& s) {
-	// TODO
+	delete[] str;
+	size = s.size;
+	str = new char[size + 1];
+	for (int i = 0; i < size; i++) {
+		str[i] = s.str[i];
+	}
+	str[size] = '\0';
+	return *this;
 }
 
 String& String::operator+=(String& s) {
-	// TODO
+	int newSize = size + s.size;
+	char* newStr = new char[newSize + 1];
+	for (int i = 0; i < size; i++) {
+		newStr[i] = str[i];
+	}
+	for (int i = 0; i < s.size; i++) {
+		newStr[size + i] = s.str[i];
+	}
+	newStr[newSize] = '\0';
+	size = newSize;
+	delete[] str;
+	str = newStr;
+	return *this;
 }

src/testString.cpp

@@ -11,8 +11,18 @@ ostream& operator<<(ostream &out, String &s) {
 int main() {
 	String s;
 	String s2('H');
+	String s3("Hallo");
+	String s4(s3);
+	String s5 = s3;
+	String s6 = ("ABC");
+	s6 += s3;
 
 	cout << s << endl;
 	cout << s2 << endl;
+	cout << s3 << endl;
+	cout << s4 << endl;
+	cout << s4[1] << endl;
+	cout << s5 << endl;
+	cout << s6 << endl;
 
 }