题解 | #编写函数实现字符串翻转（引用方式）#

#include <iostream>
#include <string.h>
using namespace std;

void reverseString(string& s){
    for(int i=0;i<s.length()/2;++i){
        s[i] ^= s[s.length()-i-1];
        s[s.length()-i-1] ^= s[i];
        s[i] ^= s[s.length()-i-1];
    }
}

int main()
{
    string s;
    string &rs = s;
    getline(cin,s);
    // write your code here......
    reverseString(rs);
    cout<<s;
    return 0;
}