fix

exercises/MPI_examples/nb_point_2_point/nb_point_2_point.c

@@ -42,6 +42,7 @@ int main(int argc, char **argv) {
       strncpy(message, "This is not a message!", 32);
       MPI_Isend(message, 32, MPI_CHAR, 1, 0, MPI_COMM_WORLD, &request);
       busy();
+      MPI_Wait(&request, &status);
       printf("[%s] Message sent: %s\n", processor_name, message);
     } else {
       MPI_Irecv(message, 32, MPI_CHAR, 0, 0, MPI_COMM_WORLD, &request);

exercises/MPI_examples/round_trip/round_trip.c

@@ -4,7 +4,7 @@
 
 int main(int argc, char** argv) {
   int rank, num_procs, token;
-
+    
   MPI_Init(&argc, &argv);
   MPI_Comm_rank(MPI_COMM_WORLD, &rank);
   MPI_Comm_size(MPI_COMM_WORLD, &num_procs);