TRACE到底是干什么用的，具体怎么来用了？

[llike]

如题

[strip]

和printf 提供的功能类似，但是TRACE输出到system debugger的debug output窗口，典型的system debugger就是VC(还有windbg, dbgviewer等等)
// example for TRACE
int i = 1;
char sz[] = "one";
TRACE( "Integer = %d, String = %s\n", i, sz );
// Output到vc的debug output窗口: 'Integer = 1, String = one'

[lxjnet]

类似printf一样的函数，不同的是TRACE将格式字串送往DEBUG的OUTPUT区，在调程序时可以很方便在将一些信息反馈给程序员。

以下代码出自MSDN
// example for TRACE
int i = 1;
char sz[] = "one";
TRACE( "Integer = %d, String = %s\n", i, sz );
// Output: 'Integer = 1, String = one'

// another example for TRACE
// Note that the TRACE() macro accepts a LPCTSTR for the format string
// parameter, while the other TRACEn() macros accept a LPCSTR.
// This means that you should use the _T() macro on formatting strings
// you supply if you want to build both _UNICODE and non-_UNICODE from
// the same source.

TRACE(_T("Hockey is best!\n"));

// remember to include <stdlib.h> to get rand() and its friends

int nCount = rand();
TRACE(_T("There are %d fans at this moment.\n"), nCount);

[heweixing_77]

TRACE主要用于程序调试，用法相当于printf语句，在VC的Output区输出“ ”中的内容以跟踪程序运行或者查看一些变量的值。

[idoloveyou]

以上同志们说的都正确