A function declaration can't understand, could you tell me who can teach me?-CodePudding

In the C language programming, the function declaration "# include" What is the role? What do you mean?

CodePudding user response:

Include the header file, as you put the string. H file copying,
Precompiled, the compiler will automatically do this step,

CodePudding user response:

Put the string. H this library guide to come in, you can use this library function

CodePudding user response:

According to the practice of "shielding" knowledge, that you can leave it, just know this header file must include, such is simple, do not affect reading again,

CodePudding user response:

Without this, you use the string functions such as strcpy, was no,
The string manipulation functions in the string header files are defined, you do not include him, told there are these functions cannot be used

CodePudding user response:

I probably understand, thank you, hey hey

CodePudding user response:

refer to the second floor and 蘤 old crepe reply:

the string. H this library guide to come in, you can use this library function

Well, know, thank you

CodePudding user response:

The equivalent of the string. H inside the content of the assignment, paste into the file