[c_hybrid_mpi+openmp] Allow passing number of steps from command line

Author: giordano

c_hybrid_mpi+openmp_dir/hybrid_pi.c

@@ -3,12 +3,16 @@
 #include <math.h>
 
 int main( int argc, char **argv ) {
-  const long int num_steps = 1000000000;
+  long int num_steps = 1000000000;
   double step, x, sum, total_sum, pi, start, stop, min_start, max_stop;
   int this_proc, num_procs, remainder;
   long int my_slice[2];
   long int i;
 
+  if (argc > 1) {
+    num_steps = atol(argv[1]);
+  }
+
   MPI_Init(&argc,&argv);
   MPI_Comm_size(MPI_COMM_WORLD,&num_procs);
   MPI_Comm_rank(MPI_COMM_WORLD,&this_proc);

c_hybrid_mpi+openmp_dir/run.sh

@@ -2,4 +2,4 @@
 
 make clean
 make
-mpirun ./hybrid_pi
+mpirun ./hybrid_pi "${@}"