its me again!

(and yes im stuck on yet another problem ***)

i have created a code where the user is asked to choose a geometry formula and

can solve a problem using any of the choices that are shown.

now this code uses the switch function, but for my next assignment i have to take the exact same code and convert it so that it is a series of function calls inside the loop and switch statement. (the loop is for letting the user calc for more than one geom object)

i dont know how to start off with the functions and how my layout should be.

this is the original code that i made and that has to be converted into a function.

```
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main ()
{
//Declaration of Variables.
double circleArea, rectangleArea, triangleArea,
length, width, height, base, radius;
char choice;
const double PI = 3.14159;
//Display the menu.
cout << "\tGeometry Calculator" << endl << endl;
cout << setw(10) << "1. Calculate the Area of a [C]ircle" << endl;
cout << setw(10) << "2. Calculate the Area of a [R]ectangle" << endl;
cout << setw(10) << "3. Calculate the Area of a [T]riangle" << endl;
cout << setw(6) << "4. [Q]uit" << endl;
cout << endl;
//Prompt User for choice.
cout << "Enter your choice (1-4)" << endl;
cin >> choice;
cout << endl;
//Calculate the area of a Circle.
switch (choice)
{
case 'C':
case 'c':
case '1':
cout << "Enter the radius of the circle: ";
cin >> radius;
if (radius < 0)
{
cout << "Number must be greater than 0. Try again" << endl;
}
else
{
circleArea = PI * pow(radius, 2);
cout << "The area of the circle is: " << circleArea;
}
cout << endl;
break;
//Calculate the area of a Rectangle.
case 'R':
case 'r':
case '2':
cout << "Enter the length and width of the rectangle: ";
cin >> length >> width;
if (length < 0 || width < 0)
{
cout << "Number must be greater than 0. Try again" << endl;
}
else
{
rectangleArea = length * width;
cout << "The area of the rectangle is: " << rectangleArea;
}
cout << endl;
break;
//Calculate the area of a Triangle.
case 'T':
case 't':
case '3':
cout << "Enter the base and height of the triangle: ";
cin >> base >> height;
if (base < 0 || height < 0)
{
cout << "Number must be greater than 0. Try again" << endl;
}
else
{
triangleArea = base * height * .5;
cout << "The area of the triangle is: " << triangleArea;
}
cout << endl;
break;
//Quit the program.
case 'Q':
case 'q':
case '4':
cout << "End of Program" << endl;
cout << "Have a Great Day!" << endl;
cout << endl;
break;
//Invalid number.
default:
cout << "That is an invalid choice." << endl;
cout << "Please select choices 1-4." << endl;
break;
}
return 0;
}
```

i know that i must have these function prototypes:

void printname();

void programInfo();

char Menu ();

void AreaCircle();

void AreaRectangle();

void AreaTriangle();

void Pause();

my assumption is that the function should ask the user for the values, validate the input, and display the area or an error message before it goes back to main.

the only problem for me is, i know in my head how it should be, but when it comes to writing out the actual code, im stuck!

please help!!

much appreciated!!