题解 | 字符串反转

#include <iostream>
#include <algorithm>
using namespace std;

int main(){
    // 字符串反转，可原地逆置
    string s;
    cin>>s;
    if(s.length() == 1){
        cout<<s<<endl;
        return 0;
    }else{
        // 字符串长度大于1
        for(int i = 0; i < s.length()/2; ++i){
            swap(s[i],s[s.length()-i-1]);
        }
    }
    cout<<s<<endl;
    return 0;
}