Program in C++ to check a given string is palindrome or not

Program in C++ to check a given string is palindrome or not Using function

First Method

#include<iostream>
#include<string.h>
 using namespace std;
  void isPalin(char str[])
   {
     int len,c=0;
     len=strlen(str);
     for(int i=0;i<len/2;i++)
     {
         if(str[i]==str[len-1-i])
           c++;
         else {
             cout<<str<<" is not palindrome string";
             return;
         }
     }
     if(len/2==c)
       cout<<str<<" is palindrome string";
   }  

   int main()
    {
        char str1[30];
        cout<<"Enter a string:-";
        cin>>str1;
        isPalin(str1);
        return 0;
    }

Output:-

Second Method

#include<iostream>
#include<string.h>
 using namespace std;
  void isPalin(char str[])
   {
     int len,i,j;
     len=strlen(str);
     char rev[len];
     for(j=0,i=len-1;i>=0;i--,j++)
      {
         rev[i]=str[j];
      }
     if(strcmp(str,rev)==0)  //if(strcmp(str,rev)==0)
       cout<<str<<" is palindrome string";
     else
       cout<<str<<" is not palindrome string";
   }
   
   int main()
    {
        char str1[30];
        cout<<"Enter a string:-";
        cin>>str1;
        isPalin(str1);
        return 0;
    }

Output:-