Question

This is a C++ statement, how do I solve this problem using the void function?

Question 29 10 pts (SHORT ANSWER) Define a void function named swap2 Nums that accepts 2 integer reference parameters: num1 and num2. The function should then swap the two numbers. Use additional variable(s) as necessary. BIVA-AIK EE311xx, V TT 12pt Paragraph O words

Answer 1

Answer :- The following C++ code swap the 2 numbers inside a function swap2Nums with the help of the third variable.The neccessary instructions are mentioned through comments in the code.

The code is :-

#include <iostream>
using namespace std;

// function definition function named as swap2Nums and taking the refrence parameters
void swap2Nums(int &a, int &b) {
    // initialising the third variable temp_var
    int temp_var;
    temp_var = a;
    a = b;
    b = temp_var;
}

int main()
{
    int num1,num2;
    //Take input of variables from user
    cin>>num1;
    cin>>num2;
    
    cout << "Before swapping the numbers are :-" << endl;
    cout << "num1 = " << num1 << endl;
    cout << "num2 = " << num2 << endl;

    // call the  function to swap the both numbers
    swap2Nums(num1,num2);
    
    // printing the value of both numbers after the swap
    cout << "After swapping the numbers are :-" << endl;
    cout << "num1 = " << num1 << endl;
    cout << "num2 = " << num2 << endl;

    return 0;
}

The output is :

Status Successfully executed Date 2020-07-31 18:39:15 Time 0 sec Mem 15.232 kB Input 2 3 Output Before swapping the numbers are :- num1 = 2 num2 = 3 After swapping the numbers are :- num1 = 3 num2 = 2

The code screenshot is :-

1 #include <iostream> 2 using namespace std; 3 4 // function definition function named as swap2Nums and taking the refrence parameters 5- void swap2Nums(int &a, int &b) { 6 // initialising the third variable temp_var 7 int temp_var; 8 temp_var = a; 9 a = b; 10 b = temp_var; 11 } 12 13 int main() 14-{ 15 int numi, num2; 16 //Take input of variables from user 17 cin>>numl; 18 cin>>num2; 19 20 cout << "Before swapping the numbers are :-" << endl; 21 cout << "numl = " << numl << endl; 22 cout << "num2 = " << num2 << endl; 23 24 // call the function to swap the both numbers 25 swap2Nums (num1, num2); 26 27 // printing the value of both numbers after the swap 28 cout << "After swapping the numbers are :-" << endl; 29 cout << "num1 = " << numl << endl; 30 cout << "num2 = " << num2 << endl; 31 32 return; 33