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Previous Year Question (PYQs)

#include<iostream.h>
using namespace std;

void swap(int &x, int &y)
{
    int temp = x;
    x = y;
    y = temp;
}

int main()
{
    int a = 5, b = 10;
    swap(a,b);
    swap(a,b);
    cout << a << " " << b;
    return 0;
}
What will be the output of above code ?




Solution

Initial values

$a = 5,; b = 10$

First call

swap(a,b)

$a = 10,; b = 5$

Second call

swap(a,b)

$a = 5,; b = 10$

Thus final output

5 10


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