fork(2) download 
  1. #include <iostream>
  2.  
  3. static int SIZE = 25;	//Количество исходов (при повышении количества бросков, нужно
  4. 						//увеличивать и это)
  5. static int ROLLS = 5;	//Количество бросков кубика
  6.  
  7. int main() {
  8.  
  9. 	double *mass = new double[SIZE]{};
  10. 	mass[0] = 1.0;
  11.  
  12. 	for (int i{}; i<ROLLS; i++)
  13. 	{
  14. 		double *temp = new double[SIZE]{};
  15. 		// 0
  16. 		temp[1] += mass[0] * 2 / 3;
  17. 		temp[2] += mass[0] / 3;
  18. 		//1
  19. 		temp[0] += mass[1] * 2 / 5;
  20. 		temp[2] += mass[1] * 2 / 5;
  21. 		temp[3] += mass[1] / 5;
  22. 		for (int j{2}; j<SIZE-2; j++)
  23. 		{
  24. 			temp[j-2] += mass[j] / 6;
  25. 			temp[j-1] += mass[j] / 3;
  26. 			temp[j+1] += mass[j] / 3;
  27. 			temp[j+2] += mass[j] / 6;
  28. 		}
  29. 		int top = SIZE-2;
  30. 		//top + 1
  31. 		temp[top] += mass[top+1] * 2 / 3;
  32. 		temp[top-1] += mass[top+1] / 3;
  33. 		//top
  34. 		temp[top+1] += mass[top] * 2 / 5;
  35. 		temp[top-1] += mass[top] * 2 / 5;
  36. 		temp[top-2] += mass[top] / 5;
  37. 		delete[] mass;
  38. 		mass = temp;
  39. 	}
  40. 	double mean = 0.0;
  41. 	for (int i{}; i<SIZE; i++)
  42. 	{
  43. 		std::cout << i << '\t' << mass[i] << std::endl;
  44. 		mean += i*mass[i];
  45. 	}
  46. 	std::cout << "mean = " << mean << std::endl;
  47. 	return 0;
  48. }
Success #stdin #stdout 0s 3472KB
comments (?)
stdin 
Standard input is empty
stdout 
0	0.103292
1	0.229609
2	0.208786
3	0.155638
4	0.134815
5	0.084321
6	0.0442901
7	0.0252058
8	0.0111111
9	0.0026749
10	0.000257202
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	0
mean = 2.63267
https://ideone.com/qFsbmJ
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!