从cin读入一组词并把它们存入一个vector对象，然后设法把所有词都改写为大写，输出改变后的结果

#include "stdafx.h"
#include <iostream>
#include <vector>
#include <string>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	string s1;

	cout << "输入一组词：";
	vector<string> v1;

	while (cin >> s1)  //ctrl+z控制终止
	{
		v1.push_back(s1);
	}

	for (auto &c : v1)
	{
		for (int i = 0; i < c.size(); i++)
		{
			c[i] = toupper(c[i]);
		}
	}

	for (auto c : v1)
	{
		cout << c << endl;
	}

	return 0;
}