int转string一、#include <sstream>
int n = 0;
std::stringstream ss;
std::string str;
ss<<n;
ss>>str;
二、#include <string>
to_string(num);
string转int
std::string str = "123";
int n = atoi(str.c_str());
int and string
原文：http://www.cnblogs.com/weiyi-mgh/p/6245296.html
