Computer Science I

Question

#include <iostream>

using namespace std;

// This function RECEIVES the lower and upper boundaries of a range of whole numbers, and a divisor.

// It counts all the numbers within the specified range (boundaries included) that are divisible by the

// divisor received.

// Once the counting is finished, the function RETURNS the count to main(). MUST use a LOOP to

// implement the count (do NOT calculate it, you will NOT get any credit for that).

countDiv ( )

{

}

int main()

{

// Declare variable(s)

// Prompt the user to enter the range's lower and upper boundaries

// Get the values from the keyboard and store them in the corresponding variables

// Prompt the user to enter the divisor

// Get the value from the keyboard and store it in the corresponding variable

// Display the count of numbers divisible by divisor returned by the function

return 0;

}

I am having trouble with the function definition on how to get the range of numbers and get the numbers divisible.

Answer 1

Ok, so in C++ there is an operator called modulo (%). This gives you the remainder when dividing two numbers.

When a number is divisible by another, the remainder is 0.

countDiv(int lower, int upper, int divisor) {

int count = 0;

for (int i = lower; i <= upper; i++) {

if (i % divisor == 0) count++;

return count;

}

As for the main, I will leave that to you.

A parting gift: use cin to get the input.

https://cplusplus.com/doc/tutorial/basic_io/