narcissistic/armstrong number check

/*
http://mathworld.wolfram.com/NarcissisticNumber.html

you should take a look at this, coz in general, our idea of armstrong numbers are wrong
we only look at base 3 narcissistic numbers as "armstrong" numbers

153(base 3 narcissistic) = 1^3 + 5^3 + 3^3
1634(base 4 narcissistic) = 1^4 + 6^4 + 3^4 + 4^4

and so on, into the higer bases.
ps:
since we deal with base 3 narcissistic numbers as "armstrong" numbers, there are 4 such "armstrongs" only >> 153, 370, 371, 407

*/

#include<stdio.h>
int main(){
    int ip=0,index=0,temp=0,sum=0,rem=0,bool=0;

    do{
        printf("enter the number: ");
        scanf("%d",&ip);

        temp=ip;

        for(index=0,sum=0;temp!=0;index++){ // since the whole thing is inside a do-while loop, its the zero initializations are needed
            printf("loop number %d\n",(index+1));
            rem = (temp%10);
            sum+= rem*rem*rem;
            temp = temp/10;
        }

        printf("\n\ninput number: %d  sum: %d\n",ip,sum);

        if(sum==ip){
            printf("hence %d is an armstrong number",ip);
        }
        else{
            printf("hence %d is not an armstrong number",ip);
        }

        printf("\n\niterate again for new number?\n yes(1) or no(0)\n enter choice: ");
        scanf("%d",&bool);

    }while(bool==1);

    return 0;
}