Question

1) Write a single function CalcArea( ) that has no input/output arguments. Inside the function, you will first print a “menu” listing 2 items: “rectangle”, “circle”.  It prompts the user to choose an option, and then asks the user to enter the required parameters for calculating the area (i.e., the width and length of a rectangle, the radius of a circle) and then prints its area.  The script simply prints an error message for an incorrect option.  

Here are two examples of running it:

>> CalcArea

Menu

1. Rectangle

2. Circle

Please choose one:2

Enter the radius of the circle: 4.1

The area is 52.81.

>> CalcArea

Menu

1. Rectangle
2. Circle

Please choose one: 1

Enter the length: 4

Enter the width: 6

The area is 24.00.

Answer 1

#include <iostream>

using namespace std;

void CalcArea() {
int option;
cout<<"\nWelcome to CalcArea";
cout<<"\nMenu";
cout<<"\n1. Rectangle";
cout<<"\n2. Circle";
cout<<"\nPlease choose one: ";
cin>>option;
if(option==1) {
double length,width,area;
cout<<"\nEnter the length: ";
cin>>length;
cout<<"\nEnter the width: ";
cin>>width;
area=length*width;
cout<<"\nThe Area is :"<<area;
}
else if(option==2) {
double radius,area;
cout<<"\nEnter the radius of the circle: ";
cin>>radius;
area=3.14*radius*radius;
cout<<"\nThe Area is :"<<area;
}
else{
cout<<"\nIncorrect option, run again";
}
}

int main()
{
CalcArea();

return 0;
}

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