From ef7879dccf05ec469c02debfc4b37a85db1e96dc Mon Sep 17 00:00:00 2001
From: Carl Pearson <pearson@illinois.edu>
Date: Wed, 16 Oct 2019 12:10:12 -0500
Subject: [PATCH] first commit

---
 Makefile  |  6 ++++++
 README.md |  1 +
 main.cpp  | 27 +++++++++++++++++++++++++++
 3 files changed, 34 insertions(+)
 create mode 100644 Makefile
 create mode 100644 README.md
 create mode 100644 main.cpp

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..94238dc
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,6 @@
+TARGETS = main
+
+all: ${TARGETS}
+
+main: main.cpp
+	mpicxx -Wall -Wextra $< -o $@
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e05ca7e
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# mpi_test
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..bc60f0d
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,27 @@
+#include <mpi.h>
+#include <stdio.h>
+
+int main(int argc, char **argv) {
+  // Initialize the MPI environment
+  MPI_Init(NULL, NULL);
+
+  // Get the number of processes
+  int world_size;
+  MPI_Comm_size(MPI_COMM_WORLD, &world_size);
+
+  // Get the rank of the process
+  int world_rank;
+  MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
+
+  // Get the name of the processor
+  char processor_name[MPI_MAX_PROCESSOR_NAME];
+  int name_len;
+  MPI_Get_processor_name(processor_name, &name_len);
+
+  // Print off a hello world message
+  printf("Hello world from %s, rank %d out of %d processors\n", processor_name,
+         world_rank, world_size);
+
+  // Finalize the MPI environment.
+  MPI_Finalize();
+}