#pragma message()怎么用，看了一些参考还是不太明白-------来个“完整”的例子看下

[tudou614]

RT

[chunhai12]

【MSDN】
The following code fragment uses the message pragma to display a message during compilation:

#if _M_IX86 == 500
#pragma message( "Pentium processor build" )
#endif

[yhb7805]

简单说就是在编译的时候输出（警告）信息。
除了象楼上的，还有
#ifdef _MY_DEFINE_
#pragma message("已经被定义_MY_DEFINE_")
#endif

[guyaguya]

#pragma message( messagestring )

Sends a string literal to the standard output without terminating the compilation. A typical use of the message pragma is to display informational messages at compile time.

The following code fragment uses the message pragma to display a message during compilation:

#if _M_IX86 == 500
#pragma message( "Pentium processor build" )
#endif

The messagestring parameter can be a macro that expands to a string literal, and you can concatenate such macros with string literals in any combination. For example, the following statements display the name of the file being compiled and the date and time when the file was last modified:

#pragma message( "Compiling " __FILE__ )
#pragma message( "Last modified on " __TIMESTAMP__ )

[healer_kx]

#pragma message( "Pentium processor build" )

这就是语法...

[tudou614]

#include <iostream>
using namespace std;
int main()
{
#if _M_IX86 == 500
#pragma message( "Pentium processor build" )
#endif

cin.get();
return 0;
}
比如说上面的程序代码，我即没有在CONSOLE的DOS BOX中看到它显示出来，也没有看到它在BUILD或者是DEBUG窗口中显示出来，请问如何才能让这个"Pentium processor build" 显示出来？？

[tudou614]

它是通过给预处理器下命令来实现的的，如果我定义了_M_IX86这个宏，就报告一条"Pentium processor build"消息，但是，这个消息到底需要在VC环境中如何设置才能才能使上面的小程序显示
"Pentium processor build"这个消息出来？？

[tudou614]

#include <iostream>
using namespace std;

int main()
{
#ifdef _DEBUG_EVENT
#if _M_IX86 == 500
#pragma message( "Pentium processor build" )
#endif



cout<<"宏_M_IX86"<<_M_IX86<<endl;
#endif

cin.get();
return 0;
}

这样不是还是不行？？

或者上面的 _DEBUG_EVENT 换成 _DEBUG

道理上能讲地通啊，实践起来怎么就不行呢？？我真菜，谁给个例子程序看下？？