c++写入txt文件

简单方式：

 #include "stdafx.h"
 #include <iostream>
 #include <iomanip>
 #include <fstream>

 using namespace std;

 void write()
 {
     ofstream out("C:\\Users\\hhx\\Desktop\\b.txt",ios::app);
     if(!out){
         cout << "Unable to open otfile";
         exit(); 

     }
     printf("writting data into file C:\\Users\\hhx\\Desktop\\b.txt\n");
     out<<"hello,"<<endl<<"world."<<endl;
     out.close();
 }

参考：http://blog.csdn.net/qingcaichongchong/article/details/8217526