// P34 1.cpp This program illustrates the local and global variables andcall-by-value.// This program computes the side area and the cross section area of acylinder#include#includeusing namespace std;// This variable is defined globally, knownconst double PI = 3.14159;to all functions in this program as PIconst double conversion = 0.3937; // This is the Cm to inch conversionfactordouble area (double r);// Function declaration for function thatcomputes cross section areadouble area (double r, double h);that computes side area// Function declaration for functionint main (void){double h, r;//variables local to the main functioncout << "Enter the radius and the height of the cylinder in Cm ";cin >> r >> h;cout << endl;cout << "Before I do any computation or call any function, I want tolet you know that \n";cout << "you have entered r = " «r <« " and h = " <« h << "." <«endl;cout << "I am planning to use inch, thus in the first function, Iwill convert r, and " << endl;cout << "in the second one I will convert h \n";cout << "The cross section area of the cylinder isinch-sqr endl;cout << "The side area of the cylinder issqr \n\n";<< area (r) << "<< area (r,h) << " inch-return 0;}double area (double r){//Cross secion area includes the disks at the bottom and the topr = r * conversion;return 2*PI*pow (r, 2);// converting r to inch Modify program P34_1.cpp to compute the side area,of a cylinder and the area and volume of a sphere, depending on thechoice that the user makes.total area, and volumeYour program should ask users to enter 1 tochoose cylinder or 2 for sphere, and display an "invalid choice error"for other values.For a cylinder, we want to compute:Side area:(2*PI*r)hTotal Area: 2*(PI*r2) + Side areaVolume:(PI*r2)*hFor a sphere, we want to compute:Surface area:4 *PI*r2Volume:(4.0/3.0)*PI*r3.Use overloading whenever possible.

#include<iostream> #include<cmath> using namespace std; const double PI = 3.14159; //…

Modify program P34 1.cpp to compute the side area, total area, and volume of a cylinder and the area and volume of a sphere, depending on the choice that the user makes. Your program should ask users to enter 1 to choose cylinder or 2 for sphere, and display an "invalid choice error" for other values. For a cylinder, we want to compute: Side area: (2*PI*r) * h Total Area: 2*(PI*r2) + Side area Volume: (PI*r2)*h For a sphere, we want to compute: Surface area: 4*PI*r2 Volume: (4.0/3.0)*PI*r3. Use overloading whenever possible.

Modify program P34 1.cpp to compute the side area, total area, and volume of a cylinder and the area and volume of a sphere, depending on the choice that the user makes. Your program should ask users to enter 1 to choose cylinder or 2 for sphere, and display an "invalid choice error" for other values. For a cylinder, we want to compute: Side area: (2PIr) * h Total Area: 2(PIr2) + Side area Volume: (PIr2)h For a sphere, we want to compute: Surface area: 4PIr2 Volume: (4.0/3.0)PIr3. Use overloading whenever possible.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sorts of applications, knowing their differences is a good place to start.

Question

// P34 1.cpp This program illustrates the local and global variables and
call-by-value.
// This program computes the side area and the cross section area of a
cylinder
#include<iostream>
#include<cmath>
using namespace std;
// This variable is defined globally, known
const double PI = 3.14159;
to all functions in this program as PI
const double conversion = 0.3937; // This is the Cm to inch conversion
factor
double area (double r);
// Function declaration for function that
computes cross section area
double area (double r, double h);
that computes side area
// Function declaration for function
int main (void)
{
double h, r;
//variables local to the main function
cout << "Enter the radius and the height of the cylinder in Cm
<Enter> ";
cin >> r >> h;
cout << endl;
cout << "Before I do any computation or call any function, I want to
let you know that \n";
cout << "you have entered r = " «r <« " and h = " <« h << "." <«
endl;
cout << "I am planning to use inch, thus in the first function, I
will convert r, and " << endl;
cout << "in the second one I will convert h \n";
cout << "The cross section area of the cylinder is
inch-sqr endl;
cout << "The side area of the cylinder is
sqr \n\n";
<< area (r) << "
<< area (r,h) << " inch-
return 0;
}
double area (double r)
{
//Cross secion area includes the disks at the bottom and the top
r = r * conversion;
return 2*PI*pow (r, 2);
// converting r to inch

Modify program P34_1.cpp to compute the side area,
of a cylinder and the area and volume of a sphere, depending on the
choice that the user makes.
total area, and volume
Your program should ask users to enter 1 to
choose cylinder or 2 for sphere, and display an "invalid choice error"
for other values.
For a cylinder, we want to compute:
Side area:
(2*PI*r)
h
Total Area: 2*(PI*r2) + Side area
Volume:
(PI*r2)*h
For a sphere, we want to compute:
Surface area:
4 *PI*r2
Volume:
(4.0/3.0)*PI*r3.
Use overloading whenever possible.

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