C program to check whether a certain number is Armstrong or not

A  number of n digit is called Armstrong number if sum of the power of n of its digits is equal to the number itself.
For example a number of three digits integer is an Armstrong number if the sum of the cubes of its digits is equal to the number itself. 153 is an Armstrong number since 1**3 + 5**3 + 3**3 = 371. 

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SOURCE CODE

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#include #include int main() { int num, rem, altnum, result = 0, n = 0 ; printf("Enter an integer: "); scanf("%d", &num); altnum = num; while (altnum != 0) { altnum /= 10; n++; } altnum = num; while (altnum != 0) { rem = altnum % 10; result = result + pow(rem, n); altnum /= 10; } if(result == num) printf("%d is an Armstrong number.", num); else printf("%d is not an Armstrong number.", num); return 0; }

OUTPUT

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