华为OJ题目（四）：字符逆序

#include <string>#include <iostream>using namespace std;int main(){string str;getline(cin, str); //输入一个字符串if (str.length() == 0){cout << str;}else{for (int i = str.length() - 1; i >= 0; i--) //改变数组下标即可{cout << str[i];}}return 0;}