Swap Using References

Easy References

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Problem Statement

Write a C++ program defining a function that swaps two integers using pass-by-reference parameters.

Input Format

Two space-separated integers A and B.

Output Format

Print swapped values of A and B separated by a space.

Constraints

-10000 <= A, B <= 10000

Sample Input

10 20

Sample Output

20 10

Explanation

Pass-by-reference parameters allow modifying caller arguments directly without pointers.

Starter Code

#include <iostream>

void swap(int &a, int &b) {
    // Write your code here
}

int main() {
    int a, b;
    if (std::cin >> a >> b) {
        swap(a, b);
        std::cout << a << " " << b << "n";
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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