Question

c++ question need help

Write a function pairWise that takes four parameters: two arrays of int and the size of the first array. The size of the first array is
guaranteed to be exactly twice the size of the 2nd array
The function takes each pair of integers from the first array and stores the product in the 2nd array.
ex: if the first array is {2, 7, 3, 4}, then the second array will end up with {14, 12}

Answer 1

#include <iostream>

using namespace std;

void pairWise(int arr1[], int arr2[], int size){
    int k = 0;
    for(int i = 0;i<size;i+=2){
        arr2[k++] = arr1[i]*arr1[i+1];
    }
}

int main()
{
    int arr1[] = {2, 7, 3, 4};
    int arr2[2];
    
    pairWise(arr1,arr2,4);
    
    for(int i = 0;i<2;i++){
        cout<<arr2[i]<<" ";
    }
    return 0;
}