Question

Write a program whose input is two integers and whose output is the two integers swapped.

Answer 1

Answer:

The program to this question can be given as:

Program:

#include <iostream>  //header file

using namespace std;   //using namespace.

void SwapValues(int* userVal1, int* userVal2); //function declaration.

void SwapValues(int* userVal1, int* userVal2) //function definition.

{ //function body.

//perform swapping

   int t = *userVal1;  

   *userVal1 = *userVal2;

   *userVal2 = t;

}

int main() //main method  

{

int n1, n2; //define variable

cout<<"Enter first number :"; //message

cin>>n1; //input by user.

cout<<"Enter second number :"; //message  

cin>>n2; //input by user.

SwapValues(&n1,&n2); //calling function.

cout<<"Swapped values"<<endl;

cout<<"first number is :"<<n1<<endl; //print value

cout<<"second number is:"<<n2<<endl; //print value

return 0;

}

Output:

Enter first number :3

Enter second number :8

Swapped values

first number is :8

second number is :3

Explanation:

The description of the above C++ language program can be given as:

• In the program, firstly we include the header file. Then we declare and define a function that is "SwapValues()" function in the function we pass two integer variable that is "userVal1 and userVal2" inside a function, we define an integer variable that is "t" and perform swapping.  
• Then we define the main function in the main function we define two variables that is "n1 and n2" this variable is used to take value-form user. then we pass this value to function and print the function values.