stringstream 函数产生随机数字字符串

#include<iostream>
#include<string>
#include <sstream>
#include<vector>
#include<ctime>
using namespace std;
string itos(int i)//转换函数
{
	stringstream s;//支持C++风格输入输出的串流
	s << i;//在流文件中，<<代表插入，>>代表提取
	return s.str();
}
string rand_string_number()
{
	int i;
	i = rand();
	string str = itos(i);
	return str;
}
void main()
{
	vector<string> result;
	srand((unsigned)time(NULL));
	for (int i = 0; i < 5; i++)
	{
		result.push_back(rand_string_number());
	}
	for (int i = 0; i < result.size(); i++)
		cout << result[i] << "  " << endl;

	system("pause");
}