C Program to Display Armstrong Number Between Two Intervals

A positive integer is called an Armstrong number if the sum of cubes of individual digit is equal to that number itself. 

For example:

153 = 1*1*1 + 5*5*5 + 3*3*3 // 153 is an Armstrong number. 

12 is not equal to 1*1*1+2*2*2 // 12 is not an Armstrong number.

#include<stdio.h>

#include<conio.h>

#include<math.h>

void main()

{

    int n1,n2,i,r,s,k;

    printf("Enter interval (two numbers): ");

    scanf("%d%d",&n1,&n2);

    for(i=n1;i<=n2;i++)

    {

        s=0;

        k=i;

        while(k>0)

        {

            r=k%10;

            s+=pow(r,3);

            k=k/10;

        }

    if(i==s)

        printf("%d\t",i);

    }

getch();

}

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