Question

In C++ Write a function that accepts two int arrays of the same size. The first array will contain numbers and the second array will be filled out inside the function.

The function should find all numbers in the array that are greater or equal to the average and fill out the second array with these numbers. You need to design the function.

I tried this code but the errors returned were: expression must have a constant value

#include<iostream>
using namespace std;

void fillArray(int arr1[],int arr2[],int arr_size)
{
int cnt=0;
double avg,sum;
for(int i=0;i<arr_size;i++)
{
sum+=arr1[i];
}

avg=sum/arr_size;
//assigning the second array
for(int i=0;i<arr_size;i++)
{
if(arr1[i]>=avg)//condition to check average
{
arr2[cnt]=arr1[i]; //assigning value to array 2
cnt++;
}
}

//printing seond array
cout<<"Second array is: ";

for(int i=0;i<cnt;i++)
{
cout<<arr2[i]<<" ";
}

}

int main()
{
int arr_size;
cout<<"Enter the size of array: ";
cin>>arr_size;
int arr1[arr_size],arr2[arr_size];
cout<<"Enter the element:\n";
for(int i=0;i<arr_size;i++)
{
cin>>arr1[i];
}
fillArray(arr1,arr2,arr_size);

}

Answer 1

#include <iostrecam>
using namespace std;

// function declaration
void fun(int arr1[], int arr2[], int size){

   cout<<"Content of 1st array: "<<endl;
   for(int i=0; i<size; i++)
       cout<<arr1[i]<<" ";
   cout<<endl;

   // taking input for 2nd array from user
   cout<<"\nEnter "<<size<<" integers :"<<endl;
   for(int i=0; i<size; i++)
       cin>>arr2[i];

   cout<<"\nContent of 2st array: "<<endl;
   for(int i=0; i<size; i++)
       cout<<arr2[i]<<" ";
   cout<<endl;
}

int main(){

   // declaring two array of size 6 and initializing first array with some value
   int arr1[] = {1,2,3,4,5,6};
   int arr2[6];

   // calling function
   fun(arr1, arr2, 6);

   return 0;
}