Question

How to check whether a given number is a disarium number in C

Answer 1

// 1^1 + 7^2 + 5^3 = 1 + 49 + 125 = 175

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

int main()
{
    int num = 175, 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--;
    }

    if (num == (int)sum)
        printf("%d is a disarium number", num);
    else
        printf("%d is not a disarium number", num);

    return 0;
}



/*
run:

175 is a disarium number

*/

 

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