Armstrong en c

#include<stdio.h>
void main(){
    int num, cNum, rem, sum;
    printf("Enter a number = ");
    scanf("%d",&num);   //153
    sum = 0;

    cNum = num; 
    while(cNum != 0){
        rem = cNum % 10;
        sum = sum + (rem * rem * rem);
        cNum = cNum / 10;
    }

    if(num == sum){
        printf("Armstrong");
    }
    else{
        printf("Not Armstrong");
    }
}
Excited Earthworm