app.cpp

#include <iostream>
#include <ctime>

using namespace std;

void fillArray(int arr[], int length){
        for(int i = 0; i < length; ++i){
                arr[i] = rand()%10; //0-9
        }
}

void printArray(int arr[], int length){
        for(int i = 0; i < length; ++i){
                cout << "arr[" << i << "] = " << arr[i] << endl;
        }
        cout << endl;
}

int main(){
        srand(time(NULL));//Seeding a random number generator

        int size;
        cout << "How big is your array?";
        cin >> size;

        int *arr1 = new int[size];
        int *arr2;
        char hello[] = "Hello World";//Arrays identifiers are similar to pointers
        char *str = hello;  //Shallow Copy. Use strcpy for a deep copy of c_strings

        fillArray(arr1, size);
        cout << "Arr1:" << endl;
        printArray(arr1, size);

        arr2 = arr1;//SHALLOW COPY OF ARR1 INTO ARR2
        cout << "Arr2:" << endl;
        printArray(arr2, size);

        fillArray(arr2, size);//CHANGE VALUES TO ARR2
        cout << "Arr1 after Arr2 gets new values" << endl;
        printArray(arr1, size); //VALUES HAVE CHANGED IN ARR1
        return 0;
}