题解 | #数字颠倒#
字符串反转
http://www.nowcoder.com/practice/e45e078701ab4e4cb49393ae30f1bb04
翻转字符串
#include<iostream>
#include<string>
using namespace std;
int main() {
string str;
cin >> str;
for (int i = 0, j = str.size() - 1; i < str.size()/2; i++, j--) {
swap(str[i], str[j]);
}
cout << str;
}
