几个编译器内置的c++宏定义的使用例子

#include "stdafx.h"
#include <iostream>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	cout<< "sizeof(wchar_t) = " << sizeof(wchar_t) << endl;
	cout<< "sizeof(char) = " << sizeof(char) << endl;

	//__LINE__
	cout<< "__LINE__：在源代码中插入当前源代码行号 = " << __LINE__ << endl;
	//__FILE__
	cout<< "__FILE__：在源文件中插入当前源文件名 = " << __FILE__ << endl;
	//__DATE__
	cout<< "__DATE__：在源文件中插入当前编译日期 = " << __DATE__ << endl;
	//__TIME__
	cout<< "__TIME__：在源文件中插入当前编译时间 = " << __TIME__ << endl;
	//__FUNCTION__
	cout<< "__FUNCTION__：在源文件中插入函数名 = " << __FUNCTION__ << endl;

	//__STDC__：当要求程序严格遵循ANSI C标准时该标识被赋值为1；

	//__cplusplus：当编写C++程序时该标识符被定义。

	system("pause");
	return 0;
}

参考：http://blog.csdn.net/xie1xiao1jun/article/details/9113169