#include<iostream>
//---------vvvvv---------vvvvv----------->const added here
void swap (const char *&x,const char *&y)
//---------------------^--------------^--> & added here
{
//vvvvv---------------------------------->const added here
const char *t = x;
x = y;
y = t;
}
int main()
{
//-vvvvv------------------------------->const added here
const char *x = "geeksquiz";
//-vvvvv------------------------------->const added here
const char *y = "geeksforgeeks";
swap(x, y); //pass arguments by reference
std::cout<<x << " "<<y;
return 0;
}
