C How to Program (8th Edition)
8th Edition
ISBN: 9780133976892
Author: Paul J. Deitel, Harvey Deitel
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 15.5E
Write a C++
Expert Solution & Answer
Program Plan Intro
Program Plan:
An inline function circleArea() is defines to calculate the area of circle.
Variable radiusValue is used to save the value of radius entered by user.
Program Description: Purpose of the program is to define an inline function circleArea() to calculate the area of circle. The formula used to calculate area of circle is =II×r2.
Explanation of Solution
Program: Following is C++ Program that prompt user to enter radius of circle calculates area of circle by calling inline function circleArea.
//include necessary header files
#include <iostream>
usingnamespace std;
/*The inline function circleArea is defined which takes input argument
radius and calculates the area of circle */
inlinedoublecircleArea( constdouble radius )
{
// formula for Radius = pi * ( radius ^ 2 )
return (3.14) * radius * radius;
}
//start of main method
intmain()
{
// Declare variables to store the value of radius
doubleradiusValue;
// Prompt user to enter the value of radius
cout<<"\nEnter the radius of your circle: ";
// read the value of radius from user
cin>>radiusValue;
// calculate the area of circle and finally display the result
cout<<"Area of circle with radius "<<radiusValue<<
" is "<<circleArea( radiusValue ) <<endl;
}//end of main
Explanation:
The given C++ program calculates the area of circle using inline function.
- Import the essential header and initialize the main() function.
- Define inline function circleArea with radius as argument.
- Declare variable radiusValue for radius of the circle.
- Formula used to calculate the area of circle is =?×r2.
- Prompt user to enter the radius of circle.
- Calculate and finally display the output.
Sample Output:
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