C Program to Check Armstrong Number

C Program to Check Armstrong Number

A positive integer is called an Armstrong number of order n if

abcd... = an + bn + cn + dn + ...

In case of an Armstrong number of 3 digits, the sum of cubes of each digits is equal to the number itself. For example:

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

# include <stdio.h>

int main()

{

    int number, originalNumber, remainder, result = 0;

    printf("Enter a three digit integer: ");

    scanf("%d", &number);

    originalNumber = number;

    while (originalNumber != 0)

    {

        remainder = originalNumber%10;

        result += remainder*remainder*remainder;

        originalNumber /= 10;

    }

    if(result == number)

        printf("%d is an Armstrong number.",number);

    else

        printf("%d is not an Armstrong number.",number);

    return 0;

}

Output:

Enter a three digit integer: 371

371 is an Armstrong number.

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