AC日记——判断字符串是否为回文 openjudge 1.7 33

#include<cstdio>
#include<string>
#include<cstring>
#include<iostream>
#include<algorithm>

using namespace std;

int len;

string word;

bool check()
{
    int l=0,r=len-1;
    while(r>l)
    {
        if(word[l]!=word[r]) return false;
        l++,r--;
    }
    return true;
}

int main()
{
    cin>>word;
    len=word.length();
    if(check()) printf("yes\n");
    else printf("no\n");
    return 0;
}