Question

How to print all disarium numbers between 1 and 100 in C

Answer 1

#include <stdio.h>
#include <math.h>

// if (sum of number digit raised to the power of their respective position) == (number))
//     printf("disarium number");

int sumDigits(int num) {
    int remainder = 0;
    int len = log10(num) + 1;
    float sum = 0.0f;

    int temp = num;
    while (temp > 0) {
        remainder = temp % 10;
        sum = sum + pow((double)remainder, (double)len);
        temp = temp / 10;
        len--;
    }

    return sum;
}

int main()
{
    for (int i = 1; i <= 100; i++) {
        if (i == sumDigits(i))
            printf("%d ", i);
    }

    return 0;
}



/*
run:

1 2 3 4 5 6 7 8 9 89

*/

 

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