Find mirror numbers in C

#include<stdio.h>
int reverse_of_num(sum)
int sum;
{
int deg,rev=0;
while(num!=0)
{
dig=num%10;
num/=10;
rev=rev*10+dig;
}
return(rev);
}


main()
{
int nrev,srev,kount;
printf("The following are the numbers that possesses the property o 12\n");
for(kount=1;kount<1000;k++)
{
nrev=reverse_of_num(kount);
srev=reverse_of_num(kount*kount);
if(srev==nrev*nrev)
{
printf("%4d\t",kount);
}
}
getch();
return 0;
}