Question

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

Answer 1

#include <iostream>
#include <cmath>
 
unsigned int roundToMultipleOf(unsigned int number, unsigned int multipleOf) {
    return multipleOf * floor(number / multipleOf);
}

int main() {
    std::cout << roundToMultipleOf(9, 5) << "\n";
    std::cout << roundToMultipleOf(19, 5) << "\n";
    std::cout << roundToMultipleOf(71, 5) << "\n";
}
  
  
  
/*
run:
  
5
15
70
  
*/

 

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