Question

How to calculate the sum of digits of 2 power 15 in C

Answer 1

#include <stdio.h>
#include <math.h>
 
int sumDigits(long num) {
    int sum = 0;
    while (num != 0) {
        sum += num % 10;
        num /= 10;
    }
     
    return sum;
}
  
int main(void) {
    int base = 2;
    int exponent = 15;
  
    long power = (long)pow(base, exponent); // 32768
  
    printf("%d", sumDigits(power));
  
    return 0;
}
  
  
  
  
/*
run:
  
26
  
*/

 

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