Added other example

Makefile

@@ -1,7 +1,10 @@
 MPICC = mpicc #The wrapper for the compiler
 CFLAGS += -g  #Useful for debug symbols
-all: helloworld
+all: helloworld hamlet
 helloworld: helloworld.c
 	$(MPICC) $(CFLAGS) $(LDFLAGS) $? $(LDLIBS) -o $@
+hamlet: hamlet.c
+	$(MPICC) $(CFLAGS) $(LDFLAGS) $? $(LDLIBS) -o $@
+
 clean:
 	rm -f helloworld

hamlet.c

@@ -0,0 +1,13 @@
+#include "mpi.h"
+#include <stdio.h>
+
+int main( int argc, char **argv ){
+ int rank, size;
+ MPI_Init( &argc, &argv );
+ MPI_Comm_rank( MPI_COMM_WORLD, &rank );
+ MPI_Comm_size( MPI_COMM_WORLD, &size );
+ printf( "Hello world! I'm process %d of %d\n",rank, size );
+ MPI_Finalize();
+
+ return 0;
+}