From 51b1f5f36bf2015e7fd8f1926e0a07d0f03ad917 Mon Sep 17 00:00:00 2001
From: Fabio Durastante <a037726@A3-dott7.polo2.sid.unipi.it>
Date: Wed, 24 Apr 2024 16:49:35 +0200
Subject: [PATCH] Added easy send receive example

---
 Makefile      |  5 +++--
 easysendrcv.c | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 easysendrcv.c

diff --git a/Makefile b/Makefile
index eccd070..078d9db 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,11 @@
 MPICC = mpicc #The wrapper for the compiler
 CFLAGS += -g  #Useful for debug symbols
-all: helloworld hamlet
+all: helloworld hamlet easysendrec
 helloworld: helloworld.c
 	$(MPICC) $(CFLAGS) $(LDFLAGS) $? $(LDLIBS) -o $@
 hamlet: hamlet.c
 	$(MPICC) $(CFLAGS) $(LDFLAGS) $? $(LDLIBS) -o $@
-
+easysendrec: easysendrcv.c
+	$(MPICC) $(CFLAGS) $(LDFLAGS) $? $(LDLIBS) -o $@
 clean:
 	rm -f helloworld
diff --git a/easysendrcv.c b/easysendrcv.c
new file mode 100644
index 0000000..fa09533
--- /dev/null
+++ b/easysendrcv.c
@@ -0,0 +1,18 @@
+#include "mpi.h"
+#include <string.h>
+#include <stdio.h>
+int main( int argc, char **argv){
+char message[20]; int myrank; MPI_Status status;
+MPI_Init(&argc, &argv);
+MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
+if (myrank == 0) {
+strcpy(message,"Hello, there");
+MPI_Send(message, strlen(message)+1, MPI_CHAR, 1, 99, MPI_COMM_WORLD);
+} else if (myrank == 1) {
+printf("Message contains: %s\n",message);
+MPI_Recv(message, 20, MPI_CHAR, 0, 99, MPI_COMM_WORLD,&status);
+printf("Received :%s:\n",message);
+}
+MPI_Finalize();
+return 0;
+}