Question

Write a function makeDoubles  in c++, that takes an integer parameter called size and:

• allocates a new array of that many double's
• initializes all elements to be 0
• returns this array

Answer 1

#include <iostream>

using namespace std;

double *makeDoubles(int size);

int main() {
    int size;
    cout << "Enter size: ";
    cin >> size;
    double *arr = makeDoubles(size);
    for (int i = 0; i < size; ++i) {
        cout << arr[i] << " ";
    }
    cout << endl;
    delete[] arr;
    return 0;
}

double *makeDoubles(int size) {
    double *arr = new double[size];
    for (int i = 0; i < size; ++i) {
        arr[i] = 0;
    }
    return arr;
}