#include <string>
#include <iostream>

using std::cin;
using std::cout;
using std::endl;
using std::string;

int main()
{
    string word;
    // read until end-of-file, writing each word to a new line
    while (cin >> word) 
        cout << word << endl;
    return 0;
}

上面这段程序是C++ Primer上的，为何出现无法编译的错误啊？

错误提示如下：
13:parse error befor character 035
16:confused by earlier errors,bailing out

我用的编译器是C-Free 3.5