Question

C++, you can skip #1

Part 2. Practice Problems The following questions ask you to write a program to compute the area of a circle using the equation A = 1 m2. The radius of the circle should be entered by the program user. 1. Draw a structure chart 2. Make a new directory called CircleFun and make it the CWD. Work inside this directory to keep your files (Main.cpp, Circle.cpp, Circle.h) grouped together 3. Using the three-file format a. Add header file guard code b. Define a constant, global variable for c. Code your function prototypes d. Code your function definitions e. Write a main function that calls your functions 4. In your code: a. Label any "formal parameters"

Answer 1

Code:

1) circle.h

#ifndef CIRCLE
#define CIRCLE

#define pi 3.1416

double circleArea(int);
#endif

2) circle.cpp

#include"circle.h"

double circleArea(int radius){
    return pi*radius*radius;
}

3) main.cpp

#include<iostream>
#include"circle.h"
using namespace std;

int main()
{
    cout<<"Enter radius: ";
    int radius;
    cin>>radius;

    cout<<"Area of Circle = "<<circleArea(radius);
}

Screenshots.

C circle.h Х C* circle.cpp X C circle.h> ... #ifndef CIRCLE #define CIRCLE C* circle.cpp > circle Area(int) #include"circle.h" main.cpp X C* main.cpp > main() #include<iostream> #include" circle.h" using namespace std; double circleArea(int radius) #define pi 3.1416 T return pi*radius*radius; double circleArea(int); #endif int main() { cout<<"Enter radius: "; int radius; cin>>radius; 10 cout<<"Area of Circle = "<<circleArea(radius); 12 PROBLEMS 3 OUTPUT DEBUG CONSOLE TERMINAL asterisk30@asterisk30-acernitro-AN515-31 MINGW64 -/OneDrive/Desktop $ g++ circle.cpp main.cpp asterisk30@asterisk30-acernitro-AN515-31 MINGW64 -/OneDrive/Desktop $ ./a.exe Enter radius: 1 Area of Circle = 3.1416 asterisk30@asterisk30-acernitro-AN515-31 MINGW64 -/OneDrive/Desktop $ ./a.exe Enter radius: 5 Area of Circle = 78.54 asterisk30@asterisk30-acernitro-AN515-31 MINGW64 ~/OneDrive/Desktop $|

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