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  1. #include <iostream>
  2. #include <cstdlib>
  3. #include <array>
  4. #include <mpi.h>
  5. using namespace std;
  6. const int arrSize = 100;
  7.  
  8. void SumMatrices()
  9. {
  10.  
  11. }
  12.  
  13. int main(int argc, char* argv[])
  14. {
  15.  
  16. 	int MB[arrSize][arrSize], MC[arrSize][arrSize], MA[arrSize][arrSize];
  17. 	int buffer;
  18. 	for (int i = 0; i < arrSize; ++i)
  19. 	{
  20. 		for (int j = 0; j < arrSize; ++j)
  21. 		{
  22. 			MB[i][j] = rand() % 100 + 10;
  23. 			MC[i][j] = rand() % 100 + 10;
  24. 		}
  25. 	}
  26.  
  27. 	int procCount, rank;
  28.  
  29. 	MPI_Init(&argc, &argv);
  30. 	MPI_Comm_size(MPI_COMM_WORLD, &procCount);
  31. 	MPI_Comm_rank(MPI_COMM_WORLD, &rank);
  32. 	MPI_Status status;
  33. 	int H = arrSize / procCount;
  34. 	int beginInd = rank * H;
  35. 	int endInd = beginInd + H - 1;
  36. 	int min = INT32_MAX;
  37.  
  38. 	cout << "Process with rank " << rank << " has started matrix addition\n";
  39.  
  40. 	while(beginInd <= endInd)
  41. 	{
  42. 		for(int i = 0; i < arrSize; ++i)
  43. 		{
  44. 			int sum = MB[beginInd][i] + MC[beginInd][i];
  45. 			MA[beginInd][i] = sum;
  46. 			if (min > sum) min = sum;
  47. 		}
  48.  
  49. 		++beginInd;
  50. 	}
  51.  
  52. 	if(rank == 0)
  53. 	{
  54. 		cout << "Proc 0 min value is " << min << "\n";
  55. 		for(int i = 1; i < procCount; ++i)
  56. 		{
  57. 			MPI_Recv(&buffer, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, &status);
  58. 			if (min > buffer) min = buffer;
  59. 		}
  60.  
  61. 		cout << "Min value is " << min;
  62. 	}
  63. 	else
  64. 	{
  65. 		buffer = min;
  66. 		cout << "Process " << rank << " passing message '" << min <<"' to process 0\n";
  67. 		MPI_Send(&buffer, 1, MPI_INT, 0, 0, MPI_COMM_WORLD);
  68. 	}
  69.  
  70. 	MPI_Finalize();
  71. 	return 0;
  72. }
  73.  
Success #stdin #stdout #stderr 0.26s 40768KB
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Standard output is empty
stderr
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Error: unexpected symbol in "using namespace"
Execution halted
https://ideone.com/H59Zxb
language:
R (R 3.5.2)
created:
16 days ago
visibility:
public

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