
Write a C++

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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