Question

Write a C++ function which takes an int array and its size as parameters. It returns an int indicating how many multiples of 3 are contained in the array. For example, if the array contains {2, 6, 8} your function should return 1. If the array contains {3, 10, 5, 6} your function should return 2. Here is the function prototype:

// int array[]: array to search
// size: number of elements in the array
int countMult(const int array[], int size);

Answer 1

Source Code:

Output:

Code in text format (See above images of code for indentation):

#include<iostream>
using namespace std;
/*function prototype*/
int countMult(const int array[],int size);
/*main function*/
int main()
{
   /*variables*/
   int i,size,count;
   /*read size from the user*/
   cout<<"Enter the size of an array: ";
   cin>>size;
   /*declare array*/
   int array[size];
   /*read elements from the user*/
   cout<<"Enter the elements:"<<endl;
   for(i=0;i<size;i++)
       cin>>array[i];
   /*function call*/
   count=countMult(array,size);
   /*print count*/
   cout<<"The number of elements are multiples of 3 are: "<<count;
   return 0;
}
/*function definition*/
int countMult(const int array[],int size)
{
   int c=0;
   for(int i=0;i<size;i++)
   {
       /*check for multiple of 3 and increment count if true*/
       if(array[i]%3==0)
           c++;
   }
   /*return count*/
   return c;
}