Question

Write a C++ program - create a 1-d array. Its data type is integer. It has 10 elements. - initialize this array by 10 integer numbers. Five elements of the array are positive, and others are negative. - use a while loop to manipulate the array as below. - If the value of an element is positive, the value is doubled. Otherwise, the value is incremented by 3. - print the new value of each element. - use a for loop to calculate the sum of all elements. - calculate the average of all elements

Answer 1

#include <iostream>

using namespace std;

int main() {
    int size = 10;
    int arr[] = {4, -1, -5, -2, 9, 4, 7, -6, 5, -3};
    int i = 0;
    while (i < size) {
        if(arr[i] > 0) {
            arr[i] *= 2;
        } else {
            arr[i] += 3;
        }
        i++;
    }
    int sum = 0;
    for (int j = 0; j < size; ++j) {
        cout << arr[j] << " ";
        sum += arr[j];
    }
    cout << endl;
    double average = sum / (double)size;
    cout << "Sum = " << sum << endl;
    cout << "Average = " << average << endl;
    return 0;
}