Note: Modify the code below using specific functions as stated in the question. Please do not use arrays or struct statements. I'm yet to take that this semseter. Obviously, you can/should use if/switch/while/do statemets to make functions work properly.

Here is the code that needs to be modified:

//header files

#include

using namespace std;

//main function

int main()

{

//variable declaraion

double area=0.0, // the area of the shape

firstDimension=0.0,

// the first dimension of the shape: the circle's area,

// the rectangle's width, the triangles height, and the

// base of the trapezoid

secondDimension=0.0,

// the second dimension (if any) of the shape: the rectangle's width,

// the triangle's base, and the top of the trapezoid

thirdDimension=0.0;

// the third (if any) of the shape: the height of the trapezoid

char choice; //the menu choice by the user

//user menu choice

cout

//user input

cout

cin >> choice;

switch(choice)

{

//calculating and printing the area of a circle

case 'C': case 'c':

cout

cin >> firstDimension;

area = 3.1415 * firstDimension * firstDimension;

cout

break;

//calculating and printing the area of a rectangle

case 'R': case 'r':

cout

cin >> firstDimension;

cout

cin >> secondDimension;

area = firstDimension * secondDimension;

cout

break;

//calculating and printing the area of a triangle

case 'T': case 't':

cout

cin >> firstDimension;

cout

cin >> secondDimension;

area = 0.5 * firstDimension * secondDimension;

cout

break;

//calculating and printing the area of a trapezoid

case 'P': case 'p':

cout

cin >> firstDimension;

cout

cin >> secondDimension;

cout

cin >> thirdDimension;

area = ((firstDimension + secondDimension)/2) * thirdDimension;

cout

break;

//defalut case, when user selects wrong option from menu

default:

cout

}

return 0;

}

This is how the code must be executable:

Shape Menu

[C]ircle

[R]ectangle

[T]riangle

Tra[p]ezoid

[Q]uit

Shape (C, R, T, P, or Q)? C

Radius? 7.8

The area of your shape is 191.134 square units.

Shape Menu

[C]ircle

[R]ectangle

[T]riangle

Tra[p]ezoid

[Q]uit

Shape (C, R, T, P, or Q)? R

Width? 12.2

Height? 7.8

The area of your shape is 95.16 square units.

Shape Menu

[C]ircle

[R]ectangle

[T]riangle

Tra[p]ezoid

[Q]uit

Shape (C, R, T, P, or Q)? T

Base? 7.2

Height? 4.44

The area of your shape is 15.984 square units.

Shape Menu

[C]ircle

[R]ectangle

[T]riangle

Tra[p]ezoid

[Q]uit

Shape (C, R, T, P, or Q)? P

Top? 10.5

Base? 17.2

Height? 5.72

The area of your shape is 79.222 square units.

Shape Menu

[C]ircle

[R]ectangle

[T]riangle

Tra[p]ezoid

[Q]uit

Shape (C, R, T, P, or Q)? Q

Good-bye!

2. (10 marks) Rewrite the program caloArea.CC that outputs a menu and reads a shape choice (circle, rectangle, triangle, or trapezoid). The program should then prompt for the appropriate dimensions and calculate the area of the shape chosen. Assume J 3.141592 o Change the program as follows: Add the menu option CQ]uit and make the program continue running until the user chooses to quit. o Your program must perform IDENTICALLY to the executable found in the course library (SL/sample/a5CalcArea). o You must define and use the following functions: char display Menu which displays the menu, reads the user's response and returns their menu choice. double calcCircleArea (double) which requires the radius of a circle and returns the circle's area. double calcRectangleArea (double, double) which requires the width and height of a rectangle (in that order) and returns the rectangle's area. double calcTriangleArea (double, double) which requires the base and height of a triangle (in that order) and returns the triangle's area. double calcTrapezoidArea (double, double, double) which requires the length of the top, length of the bottom and height (in that order) and returns the trapezoid's area