Question

8.8 Lab: Swapping variables Write a program whose input is two integers and whose output is the two integers swapped. Ex: If the input is 3 8, then the output is 8 3 Your program must define and call a function. SwapValues returns the two values in swapped order. void SwapValues(int& userVal1, int& userVal2) zybooks c++ g

Answer 1

Answer:

Following are the program in c++ language

#include<iostream> // header file

using namespace std; // using namespace

void swapvalues(int&  userVal1, int& userVal2);// fucnction declaration

int main() // main method

{

   int x,y; // variable declaration

   cout<<"Enter the two value before swapping:\n";

   cin>>x>>y; // read the two input

  cout<<"before swapping:";

  cout<<x<<y; // display the value before swapping

   swapvalues(x, y);

   cout << "\nAfter swapping:";

   cout<<x<<y; // display the value after swapping

   return 0;

}

void swapvalues(int&  userVal1, int& userVal2) // function definition

{

   int t; // variable declaration

   t = userVal1; // assign the value userval1 to variable t

   userVal1 = userVal2; // assign the value userval2 to userval1

   userVal2 = t; // assign the value of variable t to userval2

}

Output:

Enter the two value before swapping:

3

8

before swapping:3 8

After swapping   :8 3

Explanation:

Following are the description of the program

• Declared a variable "x" and "y" of type "int".
• Read a input by user in x and y .
• Display the values of variable x and y before the swapping.
• Call the function  swapvalues() by passing the value of x and y.
• After calling the console moved In the definition of swapvalues() Function where it interchanged the value of variable userVal1 and userVal2 by using third variable "t".
• After interchanged the console moved to the main function and finally display the value of variable "x" and "y' after the swapping.