C++動態建立陣列示範

/* Windows 10 作業系統電腦 */

#include <iostream>
#include <cstdlib>

using std::cout;
using std::cin;

int main(int argc, char *argv[]) {
    system("color f0");

    int length = 0;
    int *ptr = NULL;

    cout << "Please input array length : ";
    cin >> length;
    ptr = new int[length];

    cout << "ptr = " << ptr << "\n";

    for (int i = 0; i < length; i++) {
        *(ptr + i) = (i + 1);
    }

    for (int i = 0; i < length; i++) {
        cout << ptr[i] << ", ";
    }
    cout << "\n";

    delete[] ptr;
    ptr = NULL;

    cout << "\n";
    system("pause");
    return 0;
}