Write a program to check a number is palindrome

  #include<stdio.h>  
      int main()  
     {  
       int num,r,sum=0,temp;  
      printf("Enter a number: ");  
      scanf("%d",&num);  
      temp=num;  
      while(num)  
      {  
      r=num%10;  
      num=num/10;  
      sum=sum*10+r;  
     }  
      if(temp==sum)  
      printf("%d is a palindrome",temp);  
   else  
      printf("%d is not a palindrome",temp);  
   return 0;  
 }  
 Sample output:  
 Enter a number: 131  
 131 is a palindrome