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  1. //Nicolas Ruano		               CS1A		        	Chapter 4, Pp. 223, #21
  2. //
  3. /******************************************************************************
  4.  *
  5.  * AREA OF VARIOUS SHAPES CALCULATOR
  6.  * ____________________________________________________________________________
  7.  * This program calculates the area of a circle, rectangle, and triangle. 
  8.  * 
  9.  * 
  10.  * FORMULA IS BASED ON THIS CALCULATION:
  11.  * Area of a cirlce = pi * radius^2 
  12.  * Area of rectangle = Base X Height 
  13.  * Area of a triangle = Base * Height * .5 
  14.  * 
  15.  * 
  16.  * 
  17.  * ____________________________________________________________________________
  18.  * INPUT
  19.  * radiusCircle					:  The radius of the circle 
  20.  * lengthRectangle	    		: The length of the rectangle 
  21.  * widthRectangle				: The width of the rectangle 
  22.  * baseTriangle 				: The base of the triangle 
  23.  * heightTriangle				: The height of the triangle 
  24.  * 
  25.  * OUTPUT
  26.  * areaOfCircle		    
  27.  * AreaOfRectangle
  28.  * AreaOfTriangle		   
  29.  **************************************************************/
  30. #include <iostream>
  31. #include <iomanip>
  32. #include <cmath>
  33. using namespace std;
  34.  
  35. int main() {
  36.     int choice; //INPUT - THE CHOICES TO BE MADE  1-4
  37. 	float radiusCircle; //INPUT - THE RADIUS OF THE CIRCLE 
  38. 	float lengthRectangle; //INPUT - THE LENGTH OF THE RECTANGLE
  39. 	float widthRectangle; //INPUT - THE WIDTH OF THE RECTANGLE 
  40. 	float baseTriangle; //INPUT - THE BASE OF THE TRIANGLE 
  41. 	float heightTriangle; //INPUT - THE HEIGHT OF THE TRIANGLE 
  42. 	float areaOfCircle;  //OUTPUT - THE AREA OF THE CIRCLE TO BE COMPUTED 
  43. 	float areaOfRectangle; //OUTPUT - THE AREA OF THE RECTANGEL TO BE COMPUTED
  44. 	float areaOfTriangle; //OUTPUT - THE AREA OF THE TRIANGLE TO BE COMPUTED 
  45.  
  46. //
  47. // Initialize the variables
  48. cout << "Geometry Calculator" << endl;
  49.  cout << "1. Calculate the Area of a Circle" << endl;
  50.  cout << "2. Calcualte the Area of a Rectangle" << endl;
  51.  cout << "3. Calcualte the area of a Triangle" << endl;
  52.  cout << "4. Quit" << endl;
  53.  cin >> choice;
  54.  
  55.  cout << fixed << setprecision(2) << endl;
  56.  if (choice >= 0 and choice <=4) {
  57.  	switch (choice) {
  58.  	case 1:
  59.  		cout << "Please enter the radius of the circle " << endl;
  60.  		cin >> radiusCircle;
  61.  		if (radiusCircle > 0) {
  62.  			areaOfCircle = 3.14159 * (pow(radiusCircle, 2));
  63.  		cout << "The area of the circle is " << areaOfCircle;
  64.  		}
  65.  		else {
  66.  			cout << "Cannot have negative radius " << endl;
  67.  		}
  68.  		break;
  69.  	case 2:
  70.  		cout << "Please enter the length of the rectangle " << endl;
  71.  		cin >> lengthRectangle;
  72.  		if (lengthRectangle < 0 ) {
  73.  			cout << "Cannot have a negative length " << endl;
  74.  		break;
  75.  		}
  76.  
  77.  		cout << "Please enter the width of the rectangle " << endl;
  78.  		cin >> widthRectangle;
  79.  		if (widthRectangle < 0 ) {
  80.  			cout << "Cannot have a negative width " << endl;
  81.  		break;
  82.  		}
  83.  		else {
  84.  			areaOfRectangle = lengthRectangle * widthRectangle;
  85.  			cout << "The area of the of the rectangle is " << areaOfRectangle;
  86.  		}
  87.  		break;
  88.  	case 3:
  89.  		cout << "Please enter the base of the triangle " << endl;
  90.  		cin >> baseTriangle;
  91.  		if (baseTriangle < 0) {
  92.  			cout << "Cannot have a negative base " << endl;
  93.  		break;
  94.  		} 
  95.  		cout << "Please enter the height of the triangle " << endl;
  96.  		cin >> heightTriangle; 
  97.  		if (heightTriangle < 0) {
  98.  			cout << "Cannot have a negative height" << endl;
  99.  		break;
  100.  		}
  101.  		else {
  102.  			areaOfTriangle = baseTriangle * heightTriangle * .5;
  103.  		cout << "The area of the triangle is " << areaOfTriangle << endl;
  104.  		}
  105.  		break;
  106.  	case 4: 
  107.  		cout << "Goodbye" << endl;
  108.  		break;
  109.  
  110.  
  111.  
  112.  }
  113. }
  114. else {
  115. 	cout << "INVALID MENU OPTION " << endl;
  116. }
  117.  
  118.  
  119.  return 0;
  120. }
  121.  
Success #stdin #stdout 0.01s 5320KB
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Geometry Calculator
1. Calculate the Area of a Circle
2. Calcualte the Area of a Rectangle
3. Calcualte the area of a Triangle
4. Quit

INVALID MENU OPTION
https://ideone.com/5SfI78
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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