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  1. //Zachary Abdollahi				CS1A                       Chapter 6, P. 369, #2
  2. // 
  3. /*******************************************************************************
  4.  * 
  5.  * COMPUTE RECTANGLE AREA
  6.  * 
  7.  * This program calculates the area based on user-supplied length and width 
  8.  * values. The program is implemented using functions for modular design.
  9.  * 
  10.  * Computation is based on the formula:
  11.  * Area = Length x Width
  12.  * 
  13.  * INPUT
  14.  *	length	: Length of the rectangle in units
  15.  *	width	: Width of the rectangle in units
  16.  * 
  17.  * OUTPUT
  18.  *	area	: Calculated area of the rectangle
  19.  * 
  20.  ******************************************************************************/
  21.  #include <iostream>
  22.  #include <iomanip>
  23.  using namespace std;
  24.  
  25.  // Function Prototypes
  26.  double getLength();
  27.  double getWidth();
  28.  double getArea(double length, double width);
  29.  void displayData(double length, double width, double area);
  30.  
  31.  int main()
  32.  {
  33.  	double length;	// To hold the rectangle's length
  34.  	double width;	// To hold the rectangle's width
  35.  	double area;	// To hold the rectangle's area
  36.  
  37.  	// Get the rectangle's length from the user
  38.  	length = getLength();
  39.  
  40.  	// Get the rectangle's width from the user
  41.  	width = getWidth();
  42.  
  43.  	// Calculate the rectangle's area
  44.  	area = getArea(length, width);
  45.  
  46.  	// Display the rectangle's data
  47.  	displayData(length, width, area);
  48.  
  49.  	return 0;
  50.  }
  51.  /******************************************************************************
  52.   * 						    getLength
  53.   * Prompts the user to enter the rectangle's length and returns               *
  54.   * that value as a double.
  55.   *
  56.   *****************************************************************************/
  57.   double getLength()
  58.   {
  59.   	double length;
  60.  
  61.   	cout << "Enter the length of the rectangle: ";
  62.   	cin >> length;
  63.  
  64.   	return length;
  65.   }
  66.  
  67.   /*****************************************************************************
  68.    *							getWidth									   *
  69.    * Prompts the user to get the rectangle's width and returns				   *
  70.    * That value as a double.												   *
  71.    ****************************************************************************/
  72.    double getWidth()
  73.    {
  74.    	double width;
  75.    	cout << "Enter the width of the rectangle: ";
  76.    	cin >> width;
  77.  
  78.    	return width;
  79.    }
  80.  
  81.    /****************************************************************************
  82.     *						    getArea										   *
  83.     * Accepts the rectangle's length and width as arguments and returns the    *
  84.     * calculated area (length x width).										   *
  85.     ***************************************************************************/
  86.     double getArea(double length, double width)
  87.     {
  88.     	return length * width;
  89.     }
  90.  
  91.    /****************************************************************************
  92.     *							displayData									   *
  93.     * Accepts the rectangle's length, width, and area as arguments and         *
  94.     * displays them formatted on the screen.								   *
  95.     ***************************************************************************/
  96.     void displayData(double length, double width, double area)
  97.     {
  98.     	cout << fixed << showpoint << setprecision(2);
  99.     	cout << "\n--- Rectangle Details ---" << endl;
  100.     	cout << "Length : " << length << endl;
  101.     	cout << "Width  : " << width << endl;
  102.     	cout << "Area   : " << area << endl;
  103.     }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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10.5
5.2
stdout
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Enter the length of the rectangle: Enter the width of the rectangle: 
--- Rectangle Details ---
Length : 10.50
Width  : 5.20
Area   : 54.60
https://ideone.com/IfLrOp
language:
C++ (gcc 8.3)
created:
1 hour ago
visibility:
public

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