Question

How to round a number to a multiple of 5 in C

Answer 1

#include <stdio.h>
#include <math.h>
  
unsigned int roundToMultipleOf(unsigned int number, unsigned int multipleOf) {
    return multipleOf * floor(number / multipleOf);
}
  
int main() {
  printf("%d\n", roundToMultipleOf(9, 5));
  printf("%d\n", roundToMultipleOf(19, 5));
  printf("%d\n", roundToMultipleOf(71, 5));
  
  return 0;
}
  
  
  
/*
run:
  
5
15
70
  
*/

 

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