C-Program to check a number is Palindrome or not

#include<stdio.h>

int rev 0; //Global Variable

int REV(int num)
{
if(num>0)
{
rev (rev*10)+ (num 10);
REV(num / 10); //calling the Function recursively.
}
return rev;
}

int main()
{
int num;
printf("nEnter a number ");
scanf(" d" &num);
if(num REV(num))
printf("nNumber is a Palindrome");
else
printf("nNot a palindrome");
getch();
}