Question

Write a function that will take in an array (of type double), and will return the array with all of the elements doubled. You must use pass-by-reference and addressing and/or pointers to accomplish this task. C++

Answer 1

// C++ program to create a function that will take in an array (of type double), and will return the array with all of the elements doubled

#include <iostream>

using namespace std;

// function that takes input the array and size of the array

// and returns elements of the array doubled

void elementsDoubled(double array[], int size)

{

       // loop to double the elements of the array being doubled

       for(int i=0;i<size;i++)

       {

             array[i] = array[i]*array[i];

       }

}

int main()

{

      

       int size;

       // input the number of elements in the array

       cout<<"Enter the number of elements : ";

       cin>>size;

       double array[size];

       // loop to input the elements of the array

       for(int i=0;i<size;i++)

       {

             cout<<"Enter element-"<<(i+1)<<" : ";

             cin>>array[i];

       }

       elementsDoubled(array,size); // call the function to double the elements of the array

       // display the array elements

       for(int i=0;i<size;i++)

             cout<<array[i]<<" ";

       cout<<endl;

               return 0;

}

//end of program

Output: