accelerated/06-00-copy.cpp at master · wongdark2017/accelerated · GitHub

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#include <iostream>
#include <string>
#include <vector>

using namespace std;

void out(const std::vector<std::string>& v)
{
    for(std::vector<std::string>::const_iterator iter = v.begin();
        iter != v.end(); ++iter)
        cout << *iter << endl;
}

std::string::size_type width(const std::vector<std::string>& v)
{
    string::size_type maxlen = 0;
    for(std::vector<std::string>::const_iterator iter = v.begin();
        iter != v.end(); ++iter)
        maxlen = max(maxlen, iter->size());
    return maxlen;
}

std::vector<std::string> frame(const std::vector<std::string>& v)
{
    vector<string> ret;
    string::size_type maxlen = width(v);
    string border(maxlen + 4, '*');
    ret.push_back(border);
    for(std::vector<std::string>::const_iterator iter = v.begin();
        iter != v.end(); ++iter) {
        ret.push_back("* " + (*iter) + string(maxlen - iter->size(),' ') + " *");
    }
    ret.push_back(border);
    return ret;
}

std::vector<std::string> vcat(const std::vector<std::string>& top,
    const std::vector<std::string>& bottom)
{
    vector<string> ret = top;
#if 0
    copy(bottom.begin(), bottom.end(), back_inserter(ret));
#else
    ret.resize(top.size()+bottom.size());
    copy(bottom.begin(), bottom.end(), ret.begin()+top.size());
#endif
    return ret;
}

int main()
{
    vector<string> v,f;
    string line;
    while(getline(cin, line))
        v.push_back(line);
    f = frame(v);
    out(vcat(v,f));
}