Comments for int variable added

prod_mat_vec/main.c

@@ -45,7 +45,10 @@ void prod_mat_vec(int width, int height, float * vector_res, float ** matrix, fl
 }
 
 int main (int argc, char *argv[]) {
-    int rank, size, size_prob, w_prob, h_prob, h_base;
+    int rank, size,
+    size_prob, // problem size defined by the user (size of the matrix)
+    w_prob, // width of the matrix assigned to this processus (should be the same than the big matrix)
+    h_prob; // height of the matrix assigned to this processus
     float * vector; // processus' x vector
     float * vector_tot; // x vector agregation from all the processus
     float * vector_res; // product matrix vector's result of the current processus