Question

Write a program in C++ to swap two variables usingfunctions?

Answer 1

Answer:

#include <iostream>

using namespace std;

void swap(int& m, int& n)  /* passing by reference so that changes will be made in the original values.*/

{

   int t=m;

   m=n;

   n=t;

}

int main()

{

   int val1,val2;

   cout<<"Enter the values"<<endl;

   cin>>val1>>val2;

   cout<<"Values before swap "<<val1<<" "<<val2<<endl;

   swap(val1,val2); //calling the function swap..

   cout<<"Values after swap "<<val1<<" "<<val2<<endl;

return 0;

}

Explanation:

Created a function swap with 2 arguments m and n passed by reference.