C++语言开发示例：15. for循环字符串

#include <iostream>
#include <string>

int main()
{
    using namespace std;
    cout << "Enter a word: ";
    string word;
    cin >> word;

    for (int i = word.size() - 1; i >= 0; i--)
        cout << word[i];
    cout << "\nBye.\n";
}