使用bool函数判断一个字符串是否为回文字符串

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

bool isPalindrome(const string &s)
{
for(int i=0;i<s.size()/2;i++)
{
if(s[i]!=s[s.size()-1-i])
return false;
}
return true;
}

int main()
{
char *str;int length;
cout <<"input the length of the string:";
cin >>length;
str=new char[length+1];
cout <<"input a string:";
cin >> str;
if(isPalindrome(str))
cout<<"the string is a palindrome!"<<endl;
else
cout<<"the string isn't a palindrome!"<<endl;
return 0;
}