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  1. //Natalie Zarate                   CIS 5                  Chapter 4, P. 222, #21
  2.  
  3. /*******************************************************************************
  4.  * 
  5.  * COMPUTE SHAPE AREA
  6.  * _____________________________________________________________________________
  7.  * This program accepts will display a menu of 4 different shape areas the user 
  8.  * can prompt the program to calculate. The program, will accept numbers greater 
  9.  * than zero and use the user input to calculate the area of the selected shape, 
  10.  * using the formulas 2(pi)r^2 , l * w, or (b * h) / 2.
  11.  * _____________________________________________________________________________
  12.  * INPUT
  13.  *   numChoice : The choice the user picks from the menu
  14.  *   radius    : Radius of circle
  15.  *   pi        : value of pi 
  16.  *   length    : Length of rectangle
  17.  *   width     : Width of rectangle
  18.  *   base      : Base of triangle
  19.  *   height    : Height of triangle
  20.  * 
  21.  * OUTPUT
  22.  *   area      : area of shape
  23.  * 
  24.  ******************************************************************************/
  25.  #include <iostream>
  26.  #include <iomanip>
  27.  using namespace std;
  28.  
  29.  int main ()
  30.  {
  31.     /**********************************************************************
  32.      * CONSTANTS
  33.      * --------------------------------------------------------------------
  34.      * pi - value of pi
  35.      * *******************************************************************/
  36.  
  37.      const float pi = 3.14159;
  38.  
  39.      int numChoice; // INPUT - The choice the user picks from the menu
  40.      float radius;  // INPUT - Radius of circle
  41.      float length;  // INPUT - Length of rectangle
  42.      float width;   // INPUT - Width of rectangle
  43.      float base;    // INPUT - Base of triangle
  44.      float height;  // INPUT - Height of triangle
  45.      float area;    // OUTPUT - Area of shape
  46.  
  47.   // Prompt user menu
  48.     cout << "Geometry Calculator" << endl;
  49.     cout << setw(5) << "1." << " Calculate the Area of a Circle" << endl;
  50.     cout << setw(5) << "2." << " Calculate the Area of a Rectangle" << endl;
  51.     cout << setw(5) << "3." << " Calculate the Area of a Triangle" << endl;
  52.     cout << setw(5) << "4." << " Quit" << endl;
  53.     cout << endl;
  54.     cout << setw(8) << "Enter" << " your choice (1-4):" << endl;
  55.     cin >> numChoice;
  56.  
  57.   // Validate input, calculate, and display
  58.     switch (numChoice)
  59.        {
  60.        	case 1: cout << "Enter the circle's radius:" << endl;
  61.        	        cin >> radius;
  62.        	        if (radius < 0)
  63.        	            {
  64.        	        	cout << "Radius cannot be negative, re-start program and";
  65.        	        	cout << " try again.";
  66.        	            }
  67.        	        else
  68.        	            {
  69.        	            area = 2 * pi * radius;
  70.        	            cout << "The area of the circle is " << area << ". \n";
  71.        	            }
  72.        	        break;
  73.  
  74.        	case 2: cout << "Enter the length of the rectangle:" << endl;
  75.        	        cin >> length;
  76.        	        if (length < 0)
  77.        	            {
  78.        	        	cout << "Length cannot be negative, re-start program and";
  79.        	        	cout << " try again.";
  80.        	            }
  81.        	        cout << "Enter the width of the rectangle:" << endl;
  82.        	        cin >> width;
  83.        	        if (width < 0)
  84.        	            {
  85.        	        	cout << "Width cannot be negative, re-start program and";
  86.        	        	cout << " try again.";
  87.        	            }
  88.        	        else
  89.        	            {
  90.        	             area = length * width;
  91.        	             cout << "The area of the rectangle is " << area << ". \n";
  92.        	            }
  93.        	        break;
  94.  
  95.        	case 3: cout << "Enter the length of the base of the triangle:" << endl;
  96.        	        cin >> base;
  97.        	        if (base < 0)
  98.        	            {
  99.        	        	cout << "Base cannot be negative, re-start program and";
  100.        	        	cout << " try again.";
  101.        	            }
  102.        	        else
  103.        	            {
  104.        	            cout << "Enter the height of the triangle" << endl;
  105.        	            cin >> height;
  106.        	            }
  107.        	        if (height < 0)
  108.        	            {
  109.        	        	cout << "Height cannot be negative, re-start program and";
  110.        	        	cout << " try again.";
  111.        	            }
  112.        	        else
  113.        	            { area = (base * height) / 2;
  114.        	              cout << "The area of the triangle is " << area << ". \n";
  115.        	            }
  116.        	        break;
  117.  
  118.        	case 4: cout << "Program ending. \n";
  119.        	        break;
  120.        	default: cout << "Please choose from options 1-4, re-run the program";
  121.        	         cout << "and try again." << endl;
  122.                  break;
  123.        }
  124.  
  125. 	return 0;
  126.  
  127. }
Success #stdin #stdout 0s 5260KB
comments (?)
stdin 
1
-1
stdout 
Geometry Calculator
   1. Calculate the Area of a Circle
   2. Calculate the Area of a Rectangle
   3. Calculate the Area of a Triangle
   4. Quit

   Enter your choice (1-4):
Enter the circle's radius:
Radius cannot be negative, re-start program and try again.
https://ideone.com/mKVnKx
Ch 4 #21 FIX
language:
C++ (gcc 8.3)
created:
84 days ago
visibility:
public

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