C++ std::vector to std::string
가끔 vector의 내용을 콤마 로 구분된 출력을 하고 싶을 때가 종종 발생한다.
std::vector to std::string
#include <vector>
#include <string>
#include <algorithm>
#include <sstream>
#include <iterator>
#include <iostream>
int main()
{
std::vector<int> vec;
vec.push_back(1);
vec.push_back(4);
vec.push_back(7);
vec.push_back(4);
vec.push_back(9);
vec.push_back(7);
std::ostringstream oss;
if (!vec.empty())
{
std::copy(vec.begin(), vec.end()-1,
std::ostream_iterator<int>(oss, ","));
oss << vec.back();
}
std::cout << oss.str() << std::endl;
}
std::vector to std::wstring
#include <vector>
#include <string>
#include <algorithm>
#include <sstream>
#include <iterator>
#include <iostream>
int main()
{
std::vector<int> vec;
vec.push_back(1);
vec.push_back(4);
vec.push_back(7);
vec.push_back(4);
vec.push_back(9);
vec.push_back(7);
std::wostringstream oss;
if (!vec.empty())
{
// Convert all but the last element to avoid a trailing ","
std::copy(vec.begin(), vec.end()-1,
std::ostream_iterator<int, wchar_t, std::char_traits<wchar_t> >(oss, L","));
// Now add the last element with no delimiter
oss << vec.back();
}
std::wcout << oss.str() << std::endl;
}
