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(1); 

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

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