C++ Primer 3.17

从cin读入一组词并把它们存入一个vector对象，然后设法把所有的词都改写为大写形式，输出改变后的结果，每个词占一行；

# include <iostream>
# include <vector>
# include <string>
# include <cctype>
using std::vector;
using namespace std;
int main()
{
	string word;
	vector<string>fruit;
	while (cin >> word)
	{
		for (int i = 0;i < word.size();i++)
			word[i]=toupper(word[i]);
		fruit.push_back(word);
	}
	for (int i = 0;i < fruit.size();i++)
		cout << fruit[i] << endl;

	return 0;
}

输出结果：