c++ int、long long 转string int转wstring

#include <strstream>
#include <sstream>
#include <string>
string IntToString(int n)
{
    std::string result;
    std::strstream ss;
    ss <<  n;
    ss >> result;
    return result;
}

string lltoString(long long t)
{
    std::string result;
    std::strstream ss;
    ss <<  t;
    ss >> result;
    return result;
}
std::wstring IntToWstring(unsigned int i)
{
	std::wstringstream ss;
	ss << i;
	return ss.str();
}