定义一个结构体容器,怎么输出容器里的元素？

Question

struct zifu
 {
  string a1;
  string a2;
  string a3;
  int b1;
 }zifu1;
 vector<zifu>a;
 zifu1.a1='a';
 zifu1.a2='b';
 zifu1.a3='c';
 zifu1.b1=1;
 a.push_back(zifu1);
 zifu1.a1='d';
 zifu1.a2='e';
 zifu1.a3='f';
 zifu1.b1=2;
 a.push_back(zifu1);

以上代码怎么输出容器里的元素或将容器里的元素写入txt文件？（我通过重载输出运算符也不行，可能我重载输出运算符有误）

Answer 1

#include "stdafx.h"

#include <iostream>
#include <fstream> 
#include <vector>
#include <string>
using namespace std;

struct zifu
{
	string a1;
	string a2;
	string a3;
	int b1;
}zifu1;

ostream& operator<<(ostream& out, const zifu& zf)
{
	out<<"a1: "<<zf.a1<<"a2: "<<zf.a2<<"; a3: "<<zf.a3<<"; b1: "<<zf.b1;
	return out;
}
int _tmain(int argc, _TCHAR* argv[])
{	
	vector<zifu>a;
	zifu1.a1='a';
	zifu1.a2='b';
	zifu1.a3='c';
	zifu1.b1=1;
	a.push_back(zifu1);
	zifu1.a1='d';
	zifu1.a2='e';
	zifu1.a3='f';
	zifu1.b1=2;
	a.push_back(zifu1);
	for(vector<zifu>::const_iterator iter = a.begin(); iter != a.end(); ++iter)
	{
		cout<<*iter<<endl;
	}

	// Write File
	ofstream file;
	file.open("E:\\11.txt");
	char buf[32] = {0};
	string strText;
	for(vector<zifu>::const_iterator iter = a.begin(); iter != a.end(); ++iter)
	{
		memset(buf, 0, sizeof(buf));
		sprintf(buf, "%d", iter->b1);
		strText += iter->a1 + ", " + iter->a2 + ", " + iter->a3 + "," + buf + "\r\n";
	}
	file.write(strText.c_str(), strText.length());
	file.close();
	return 0;
}

---

Visual C++ enthusiast, like network programming and driver development. At present is being engaged in the WinCE/Windows Mobile platform embedded development.

Answer 2

非常感谢！

thank you very munch !