C++primer习题3.14 vector<string>读写字符

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <iostream>
#include <vector>
using namespace std;
void get_upper(string &s)
{
        for(size_t i = 0; i != s.size(); ++i)
        {
                s[i] = toupper(s[i]);
        }
}
int main()
{
        ifstream infile("E:\\test.txt");
        if (!infile)
        {
                cerr << "error" << endl;
        }
        vector<string> svec;
        string s;
    while (infile)
    {
                infile >> s;
                svec.push_back(s);
    }
        for(size_t i = 0; i != svec.size(); ++i)
        {
                get_upper(svec[i]);
                cout << svec[i] << " ";
                if ((i+1)%8==0)
                {
                        cout << endl;
                }
        }
}