c++primer(第五版)3.17

#include <iostream>
#include <string>
#include <vector>
using namespace std;
using std::vector;
int main()
{
	string v1;
	vector<string> v2;
	while (cin >> v1)
	{
		v2.push_back(v1);
	}	
	for (auto &c : v2)
	{ 
		for (auto &t : c)
		{
			t = toupper(t);
		}
		cout << c << endl;
	}
	system("pause");
	return 0;
}