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  1.  
  2. #include <mpi.h> //For MPI_functions, etc
  3. #include <stdio.h>
  4. #include <string.h> // For string functions
  5. const int MAX_STRING = 100;
  6.  
  7. int main( ) {
  8.     char greeting[MAX_STRING];
  9.     int comm_sz; //Number of processes
  10.     int my_rank; //My process rank
  11.     MPI_Init(NULL, NULL);
  12.     MPI_Comm_size(MPI_COMM_WORLD, &comm_sz);
  13.     MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
  14.     if (my_rank != 0) {
  15.         sprintf(greeting, "Hello from process %d of %d!", my_rank, comm_sz);
  16.         MPI_Send(greeting, strlen(greeting)+1, MPI_CHAR, 0, 0, MPI_COMM_WORLD);
  17.     } else {
  18.         printf("Hello from process %d of %d! \n", my_rank, comm_sz);
  19.         for (int q=1; q<comm_sz; q++) {
  20.             MPI_Recv(greeting, MAX_STRING, MPI_CHAR, q, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
  21.             printf("%s\n", greeting);
  22.         }
  23.     }
  24.     MPI_Finalize();
  25.     return 0;
  26. } //main
  27.  
  28.  
Success #stdin #stdout #stderr 0.27s 40860KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Error: unexpected symbol in "const int"
Execution halted
https://ideone.com/OSg9Ce
language:
R (R 3.5.2)
created:
16 days ago
visibility:
public

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