Answer to Question #162066 in C++ for Kefilwe Mamabolo

Question

A student in Programming 1 wants to know the surface area and volume of a cylindrical shape.

Figure 5.1: Example of a cylinder

Volume = PI(R^²) x height

Area = 2PI(R^²) x height + 2PI(R^²) 

5.1.1 Write a program that will assist the students:

5.1.2Create a C++ source file called Cylinder and save it in a file called Cylinder.cpp.

5.2 Create the following functions: 

5.2.1 calcVolume() This function will receive three parameters and it must then calculate 

and return the volume of a cylinder using the information given 

above.

5.2.2 calcArea() This function will receive three parameters and it must then calculate 

and return the area of a cylinder using the information given above.

5.2.3 main() NB: The functions must be implemented above the main.

Add all necessary pre-processor directives.

 Declare all constants and necessary variables.

 Prompt the user for the height of the cylinder, and the radius of

the base of the cylinder.

 Based on the users option :

o Do the relevant calculations by calling the correct 

function.

 Display the results of the desired measurement.

 If an invalid option is selected an appropriate error message 

must be displayed, see Figure 5.5.

NB: Use a switch for the selection

o This process must be repeated until there no calculations to 

perform (N/n).

Answer 1

#include <iostream>
//*****************************************************************
using namespace std;
const double PI = 3.145;
//*****************************************************************
double Volume(double R, double h)
{
	return PI*R*R*h;
}
//*****************************************************************
double Area(double R, double h)
{
	return 2*PI*R*(h + R);
}
//*****************************************************************
int main()
{
	cout << "Enter Cylinder radius: ";
	double R;
	cin >> R;
	cout << "Enter Cylinder height: ";
	double h;
	cin >> h;
	cout << "*****MENU*****" << endl;
	cout << "1. Find Cylinder volume." << endl;
	cout << "2. Find Cylinder area." << endl;
	cout << "What is your choice (1 or 2)? ";
	int choice;
	cin >> choice;
	if(choice == 1) cout << "Volume of this Cylinder is: " << Volume(R, h) << endl;
	if(choice == 2) cout << "Area of this Cylinder is: " << Area(R, h) << endl;
	if(choice != 1 && choice != 2) cout << "You enter wrong option." << endl;
	return 0;
}