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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int xc = 20;
  6. int yc = 15;
  7. int r = 10;
  8.  
  9. void plot(int x, int y)
  10. {
  11.     cout << "(" << x << ", " << y << ") ";
  12. }
  13.  
  14. void midpointCircle()
  15. {
  16.     int x = 0;
  17.     int y = r;
  18.     int p = 1 - r;
  19.  
  20.     while (x <= y)
  21.     {
  22.         plot(xc + x, yc + y);
  23.         plot(xc - x, yc + y);
  24.         plot(xc + x, yc - y);
  25.         plot(xc - x, yc - y);
  26.  
  27.         plot(xc + y, yc + x);
  28.         plot(xc - y, yc + x);
  29.         plot(xc + y, yc - x);
  30.         plot(xc - y, yc - x);
  31.  
  32.         cout << endl;
  33.  
  34.         if (p < 0)
  35.         {
  36.             p = p + 2 * x + 3;
  37.         }
  38.         else
  39.         {
  40.             p = p + 2 * (x - y) + 5;
  41.             y--;
  42.         }
  43.  
  44.         x++;
  45.     }
  46. }
  47.  
  48. int main()
  49. {
  50.     cout << "Midpoint Circle Drawing Algorithm\n";
  51.     cout << "Center = (" << xc << ", " << yc << ")\n";
  52.     cout << "Radius = " << r << "\n\n";
  53.  
  54.     midpointCircle();
  55.  
  56.     return 0;
  57. }
Success #stdin #stdout 0s 5324KB
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Standard input is empty
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Midpoint Circle Drawing Algorithm
Center = (20, 15)
Radius = 10

(20, 25) (20, 25) (20, 5) (20, 5) (30, 15) (10, 15) (30, 15) (10, 15) 
(21, 25) (19, 25) (21, 5) (19, 5) (30, 16) (10, 16) (30, 14) (10, 14) 
(22, 25) (18, 25) (22, 5) (18, 5) (30, 17) (10, 17) (30, 13) (10, 13) 
(23, 25) (17, 25) (23, 5) (17, 5) (30, 18) (10, 18) (30, 12) (10, 12) 
(24, 24) (16, 24) (24, 6) (16, 6) (29, 19) (11, 19) (29, 11) (11, 11) 
(25, 24) (15, 24) (25, 6) (15, 6) (29, 20) (11, 20) (29, 10) (11, 10) 
(26, 23) (14, 23) (26, 7) (14, 7) (28, 21) (12, 21) (28, 9) (12, 9) 
(27, 22) (13, 22) (27, 8) (13, 8) (27, 22) (13, 22) (27, 8) (13, 8)
https://ideone.com/qfUcd8
language:
C++ (gcc 8.3)
created:
17 hours ago
visibility:
public

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