C PROGRAM FOR ARMSTRONG NUMBER UPTO LIMIT

#include<stdio.h>
int main () {
int num,n,sum,r,limit;
printf("ENTER THE LIMIT\n");
scanf("%d",&limit);
printf("Armstrong numbers upto given limit are:\n");
for(num=1;num<limit;num++)
{
    n = num;
    sum = 0 ;
    while (n!=0)
        {
            r=n%10;
            sum=sum+(r*r*r);
            n=n/10;
        }
    if(sum==num)
        {printf("%7d\n",num);}
}
return 0;
}