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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. // range : [min, max]
  6. int random(int min, int max) {
  7.    static bool first = true;
  8.    if (first) {  
  9.       srand(time(NULL)); //seeding for the first time only!
  10.       first = false;
  11.    }
  12.    return min + rand() % (max - min + 1);
  13. }
  14.  
  15. std::pair<int,int> rand_heading_point(int start_x, int start_y, int max_x, int max_y, int heading_dir) {
  16.     int turn_x = 0;
  17.     int turn_y = 0;
  18.  
  19.     if (heading_dir <= 90) {
  20.       turn_x = random(start_x, max_x);
  21.       turn_y = random(start_y, max_y);
  22.     } else if (heading_dir <= 180) {
  23.       turn_x = random(0, start_x);
  24.       turn_y = random(start_y, max_y);
  25.     } else if (heading_dir <= 270) {
  26.       turn_x = random(0, max_y);
  27.       turn_y = random(0, start_y);
  28.     } else {
  29.       turn_x = random(start_x, max_x);
  30.       turn_y = random(0, start_y);
  31.     }
  32.  
  33.     return std::make_pair(turn_x, turn_y);
  34. }
  35.  
  36. int main() {
  37. 	// your code goes here
  38.  
  39. 	int start_x = 100;
  40. 	int start_y = 100;
  41. 	int width = 500;
  42. 	int height = 500;
  43. 	int dir = 80;
  44.  
  45. 	auto heading_point = rand_heading_point(start_x, start_y, width, height, dir);
  46.  
  47. 	cout << "x: " << heading_point.first << ", y: " << heading_point.second << endl;
  48.  
  49. 	return 0;
  50. }
Success #stdin #stdout 0s 3456KB
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stdin
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Standard input is empty
stdout
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x: 328, y: 217
https://ideone.com/IqLsCP
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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