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  1.  
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4. #include <mpi.h>
  5.  
  6. #define ARRAY_SIZE 1000
  7.  
  8. int main(int argc, char** argv) {
  9.     int rank, size;
  10.     int numbers[ARRAY_SIZE];
  11.     int local_min, global_min;
  12.  
  13.     MPI_Init(&argc, &argv);
  14.     MPI_Comm_rank(MPI_COMM_WORLD, &rank);
  15.     MPI_Comm_size(MPI_COMM_WORLD, &size);
  16.  
  17.     // Each process generates random numbers
  18.     srand(rank); // Seed with process rank for different random numbers
  19.     for (int i = 0; i < ARRAY_SIZE; ++i) {
  20.         numbers[i] = rand();
  21.     }
  22.  
  23.     // Each process finds its local minimum
  24.     local_min = numbers[0];
  25.     for (int i = 1; i < ARRAY_SIZE; ++i) {
  26.         if (numbers[i] < local_min) {
  27.             local_min = numbers[i];
  28.         }
  29.     }
  30.  
  31.     // Reduce local minimums to find the global minimum
  32.     MPI_Reduce(&local_min, &global_min, 1, MPI_INT, MPI_MIN, 0, MPI_COMM_WORLD);
  33.  
  34.     // Print the global minimum
  35.     if (rank == 0) {
  36.         printf("Global minimum: %d\n", global_min);
  37.     }
  38.  
  39.     MPI_Finalize();
  40.     return 0;
  41. }
  42.  
  43.  
Success #stdin #stdout #stderr 0.27s 40732KB
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Standard input is empty
stdout
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Standard output is empty
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Error: unexpected symbol in "int main"
Execution halted
https://ideone.com/zJHKue
language:
R (R 3.5.2)
created:
18 days ago
visibility:
public

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