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  1. // Cenyao Huang                        CS1A                    Homework 4, p. 220, #4
  2.  
  3. /************************************************************************************
  4. * DETERMINE WHICH RECTANGLE AREA IS GREATER
  5. *
  6. * This program determines which of two triangle areas is greater after their length
  7. * and widths are inputted. 
  8. *
  9. * This program will use the formula: 
  10. * Area = length * width
  11. *
  12. * Input
  13. * length1 : the value of the length of the first rectangle
  14. * width1 : the value of the width of the first rectangle
  15. * length2: the value of the length of the second rectangle
  16. * width2 : the value of the width of the second rectangle
  17. * Area1 : the value of the area of the first rectangle
  18. * Area2 : the value of the area of the second rectangle
  19. *
  20. * Output
  21. * A message that shows which rectangle is greater, or if the input is invalid
  22. *  
  23. *
  24. ************************************************************************************/
  25. #include <iostream>
  26. using namespace std;
  27.  
  28. int main() {
  29. 	double length1, width1, length2, width2, Area1, Area2; // variable assignment
  30.  
  31.     // Ask and display length, width, and area of first rectangle
  32.     cout << "Please enter the length and width the first rectangle: ";
  33.     cin >> length1 >> width1; 
  34.     cout << length1 << " " << width1 << endl; 
  35.     Area1 = length1 * width1; 
  36.     cout << "The area of the first rectangle is: " << Area1 << endl << endl;
  37.  
  38.     // Ask and display length, width, and area of second triangle
  39.     cout << "Please enter the length and width of the second triangle: ";
  40.     cin >> length2 >> width2;
  41.     cout << length2 <<  " " << width2 << endl; 
  42.     Area2 = length2 * width2;
  43.     cout << "The area of the second rectangle is: " << Area2 << endl << endl; 
  44.  
  45.     // determine and display the greater area
  46.     if (Area1 > Area2)
  47.        cout << "The first rectangle has a greater area.";
  48.     else if (Area2 > Area1)
  49.        cout << "The second rectangle has a greater area.";
  50.     else 
  51.        cout << "Invalid input. Please try again.";
  52.  
  53. 	return 0;
  54. }
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin
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20 20 30 30
stdout
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Please enter the length and width the first rectangle: 20 20
The area of the first rectangle is: 400

Please enter the length and width of the second triangle: 30 30
The area of the second rectangle is: 900

The second rectangle has a greater area.
https://ideone.com/lsU56V
rectangle area- ch4
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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