From d9fc1711573d408ff94ec3b95abfd4ff7a8e818a Mon Sep 17 00:00:00 2001
From: Mike Smith <grimbough@gmail.com>
Date: Fri, 4 May 2018 16:10:34 +0200
Subject: [PATCH] added cpp program
---
exercises/hpc_example.cpp | 64 +++++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
create mode 100644 exercises/hpc_example.cpp
diff --git a/exercises/hpc_example.cpp b/exercises/hpc_example.cpp
new file mode 100644
index 0000000..e923b2f
--- /dev/null
+++ b/exercises/hpc_example.cpp
@@ -0,0 +1,64 @@
+
+// C program to illustrate
+// command line arguments
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+#include <iostream> // std::cout, std::endl
+#include <thread> // std::this_thread::sleep_for
+#include <chrono> // std::chrono::seconds
+#include <vector>
+#include <sstream>
+
+int main(int argc,char* argv[])
+{
+
+ std::vector <std::string> sources;
+ int *a;
+ size_t mem = 0;
+ int time = 10;
+ char hostname[HOST_NAME_MAX];
+
+
+ for (int i = 1; i < argc; ++i) {
+ if (std::string(argv[i]) == "-t") {
+ if (i + 1 < argc) { // Make sure we aren't at the end of argv!
+ std::stringstream ss1(argv[++i]);
+ if (!(ss1 >> time))
+ std::cerr << "Invalid number " << argv[i] << '\n';
+ } else { // Uh-oh, there was no argument to the destination option.
+ std::cerr << "-t option requires one argument." << std::endl;
+ return 1;
+ }
+ } else if (std::string(argv[i]) == "-m") {
+ if (i + 1 < argc) { // Make sure we aren't at the end of argv!
+ std::stringstream ss2(argv[++i]);
+ if (!(ss2 >> mem))
+ std::cerr << "Invalid number " << argv[i] << '\n';
+ } else { // Uh-oh, there was no argument to the destination option.
+ std::cerr << "-m option requires one argument." << std::endl;
+ return 1;
+ }
+ } else {
+ sources.push_back(argv[i]);
+ }
+ }
+
+ int result = gethostname(hostname, HOST_NAME_MAX);
+ std::string hostname2 = hostname;
+
+ std::cout << "Current host is: " + hostname2 << std::endl;
+ std::cout << "Wait time is: " << time << " seconds" << std::endl;
+ std::cout << "Memory usage is: " << mem << "MB" << std::endl;
+
+ long int l = mem * 1024 * 1024;
+
+ a = (int*)calloc(mem, 1024 * 1024);
+ memset(a, 0, mem * 1024 * 1024);
+ std::this_thread::sleep_for (std::chrono::seconds(time));
+ free(a);
+
+ return 0;
+}
--
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