Check the given number is Armstrong number or not using c program

#include<stdio.h> 
int main(){ 
int num,r,sum=0,temp; 
printf("\nEnter a number:-"); 
scanf("%d",&num); 
temp=num; 
while(num!=0){ 
r=num%10; 
num=num/10; 
sum=sum+(r*r*r); 
} 
if(sum==temp) 
printf("\nThe number %d is an armstrong number",temp); 
else 
printf("\nThe number %d is not an armstrong number",temp); 
return 0; 
}