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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. #include<string.h>
  4. #include "mpi.h"
  5. #define ARRAY_SIZE 1000
  6. int main(int argc,char* argv[])
  7. {
  8.     int rank,size;
  9.     int i,sum=0,data[ARRAY_SIZE];
  10.     int local_sum = 0;
  11.     MPI_Init(&argc,&argv);
  12.     MPI_Comm_rank(MPI_COMM_WORLD,&rank);
  13.     MPI_Comm_size(MPI_COMM_WORLD,&size);
  14.  
  15.     srand(rank+1);
  16.  
  17.         printf("Generating random nos\n");
  18.         for(i=0;i<ARRAY_SIZE;i++)
  19.         {
  20.             data[i]=rand()%100;
  21.         }
  22.  
  23.     MPI_Scatter(data,ARRAY_SIZE/size,MPI_INT,data,ARRAY_SIZE/size,MPI_INT,0,MPI_COMM_WORLD);
  24.     for(i=0;i<ARRAY_SIZE/size;i++)
  25.     {
  26.         local_sum += data[i];
  27.     }
  28.  
  29.     MPI_Reduce(&local_sum,&sum,1,MPI_INT,MPI_SUM,0,MPI_COMM_WORLD);
  30.     if(rank == 0)
  31.     {
  32.         printf("The sum is : %d",sum);
  33.     }
  34.     MPI_Finalize();
  35.     return 0;
  36. }
Success #stdin #stdout #stderr 0.25s 40776KB
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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 "int main"
Execution halted
https://ideone.com/0bTkJa
language:
R (R 3.5.2)
created:
17 days ago
visibility:
public

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