Rename OMPgetnum.cpp to OpenMP functions and clauses/OMPgetnum.cpp

OpenMP functions and clauses/OMPgetnum.cpp

@@ -0,0 +1,49 @@
+//利用OpenMP获取计算机核心数量与线程数量
+#include <omp.h>
+#include <iostream>
+#include <stdio.h>
+#include <Windows.h>
+
+CRITICAL_SECTION cs;
+
+using namespace std;
+
+int main()
+{
+
+	//串行执行开始
+	cout<<"Serial begin."<<endl;
+	cout<<"Processor number: "<<omp_get_num_procs()<<endl;//获取逻辑处理器个数
+	cout<<"Thread number: "<<omp_get_num_threads()<<endl;//获取线程数量
+	cout<<"Parallel begin."<<endl;//并行执行开始
+	InitializeCriticalSection(&cs);
+	omp_set_num_threads(16);
+#pragma omp parallel num_threads(12)
+	{
+		EnterCriticalSection(&cs);
+		cout<<"Processor number: "<<omp_get_num_procs()<<
+			" Thread number: "<<omp_get_num_threads()<<
+			" Thread ID: "<<omp_get_thread_num()<<endl;
+		LeaveCriticalSection(&cs);
+	}
+	cout<<"Parallel end."<<endl;//并行执行结束
+	cout<<"Serial end."<<endl;//串行执行结束
+
+
+	/*
+	//串行执行开始
+	printf("Serial begin.");
+	printf("\nProcessor number: %d",omp_get_num_procs());//获取逻辑处理器个数
+	printf("\nThread number: %d",omp_get_num_threads());//获取线程数量
+	printf("\nParallel begin.");//并行执行开始
+	//omp_set_num_threads(4);
+#pragma omp parallel 
+	{
+		printf("\nProcessor number: %d, Thread number: %d, Thread ID: %d"
+			,omp_get_num_procs(),omp_get_num_threads(),omp_get_thread_num());
+	}
+	printf("\nParallel end.");//并行执行结束
+	printf("\nSerial end.\n");//串行执行结束
+	*/
+	return 0;
+}