string的用法

#include <string>#include <iostream>using namespace std;int main()  {     setlocale(LC_ALL,"Chinese-simplified");  //设置语言运行环境string str="你好，c++";   cout<<"多字节字符串的string："<<str<<endl;   int x=str.size();   cout<<"多字节字符串string所占用的字节数："<<x<<endl;    wstring  wstr=L"你好，c++";   wcout<<L"UNICODE字符串的wstring："<<wstr<<endl;     int y = wstr.size();   cout<<"UNICODE字符串wstring所包含的字数："<<y<<endl;   system("pause");     return 0;  }