Merge branch 'master' of gitlab.inria.fr:sed-rennes/formations/tutorials_parallel_computing

pthread/main.cpp

+/* 
+
+ * hello.c - Pthreads "hello, world" program 
+
+ */
+
+#include <pthread.h>
+#include <iostream>
+
+void *thread(void *vargp);
+
+int main() 
+{
+    pthread_t tid;
+	std::cout << "Hello World from the main thread!" << std::endl;
+    pthread_create(&tid, NULL, thread, NULL);
+	pthread_join(tid, NULL);
+    pthread_exit((void *)NULL);
+}
+
+
+
+void *thread(void *vargp) /* thread routine */
+{
+	std::cout << "Hello World from a thread created by the main thread!" << std::endl; 
+    pthread_exit((void *)NULL);
+	return NULL;
+}