#include<iostream> using namespace std; bool judge(string str) { // write code here int l=0; int r=str.size()-1; while(l<r){ if(str[l]!=str[r])return false; l++; r--; } return true; } int main(){ cout<<"请输入要判断的字符串:"<<endl; string a; cin>>a; if(judge(a))cout<<"是回文字符串"<<endl; else cout<<"不是回文字符串"<<endl; }