预编译头文件

如果工程很大，头文件很多，而有几个头文件又是经常要用的，那么



1。把这些头文件全部写到一个头文件里面去，比如写到preh.h



2。写一个preh.c，里面只一句话：#include "preh.h"



3。对于preh.c，在project setting里面设置creat precompiled headers，对于其他



.c文件，设置use precompiled header file

-If the precompiled header file works great, a lot of header files, but there are several header files is often use, then 1. All these header files to write a header file inside, such as write preh.h 2. Write a preh.c, there is only one sentence:# include " preh.h"　3. For preh.c, which set the project setting creat precompiled headers, for the other. C files, settings, use precompiled header file