Pass by Reference

Lab C++ Beginner 10 points

Write void doubleIt(int &x) that doubles its argument in place. Read n numbers, double each with your function, and print them.

Input

Line 1: n. Line 2: n integers.

Output

One line.

Example

Input

4
1 2 3 4

Output

2 4 6 8

Sample input available Sample output available

Editor

C++

Hints

int &x is a reference: changes to x change the caller's variable.

Solution explanation

References are C++'s cleaner alternative to pointers for "modify my argument".

Show solution

#include <iostream>
using namespace std;

void doubleIt(int &x) {
    x *= 2;
}

int main() {
    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        int x;
        cin >> x;
        doubleIt(x);
        cout << x << (i < n - 1 ? " " : "\n");
    }
    return 0;
}

Output

Answer