C++ primer 习题练习：3.14

//***********************************
//习题 3.14
//***********************************
#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main()
{
	vector<string> svec;
	string str;
	//read txt into sevc
	cout<<"Enter text(Ctrl+z to end):"<<endl;
	while (cin>>str)
	{
		svec.push_back(str);
	}
	if (svec.size()==0)
	{
		cout<<"No string!"<<endl;
		return -1;
	}
	cout<<"Transformed elements from the vector:"<<endl;
	for (vector<string>::size_type ix=0;ix!=svec.size();++ix)
	{
		for (string::size_type index=0;index!=svec[ix].size();++index)
		{
			if (islower(svec[ix][index]))//字符为小写字母
			{
				svec[ix][index]=toupper(svec[ix][index]);
			}
		}
		cout<<svec[ix]<<" ";
	}
	return 0;
}