c++ - What should go into an .h file? - Stack Overflow
WEBDec 22, 2009 · Header files (.h) are designed to provide the information that will be needed in multiple files. Things like class declarations, function prototypes, and enumerations typically go in header files. In a word, "definitions". Code files (.cpp) are designed to provide the implementation information that only needs to be known in one file.
What do .c and .h file extensions mean to C? - Stack Overflow
WEBFeb 3, 2017 · 1. The .c files are source files which will be compiled. The .h files are used to expose the API of a program to either other part of that program or other program is you are creating a library. For example, the program PizzaDelivery could have 1 .c file with the main program, and 1 .c file with utility functions.
What does '#include <stdio.h>' really do in a C program
WEBSep 30, 2013 · stdio.h is the place where information for that printf resides. Update: Rather the prototype of printf function (name, return type and parameters) reside in stdio.h. That is all required in the compilation phase. The actual code of printf is included in the linking phase, which comes after compilation. The include statement basically inserts ...
c++ - #include in .h or .c / .cpp? - Stack Overflow
WEBJun 9, 2010 · The only time you should include a header within another .h file is if you need to access a type definition in that header; for example: #ifndef MY_HEADER_H. #define MY_HEADER_H. #include <stdio.h>. void doStuffWith(FILE *f); // need the definition of FILE from stdio.h. #endif.
Why use #ifndef CLASS_H and #define CLASS_H in .h file but not …
WEBJan 24, 2016 · If not, it will define FILE_H and continue processing the code between it and the #endif directive. The next time that file's contents are seen by the preprocessor, the check against FILE_H will be false, so it will immediately scan down to the #endif and continue after it. This prevents redefinition errors.
c++ - .c vs .cc vs. .cpp vs .hpp vs .h vs .cxx - Stack Overflow
WEB*.h or *.hpp for your class definitions What is the difference between .cc and .cpp file suffix? I used to think that it used to be that:.h files are header files for C and C++, and usually only contain declarations..c files are C source code..cpp files are C++ source code (which can also be C source code).
c - What mean file with extension "h.in"? - Stack Overflow
WEB6. Files ending with .in are typically template files used by a program called configure that generates a new file without the extension after substituting for variable expansions. I.e., if you're looking at a source tree that has files called, e.g. Makefile.in in the tree, then ./configure will generate a usable Makefile that can be used to ...
c++ - <iostream> vs. <iostream.h> vs. "iostream.h" - Stack Overflow
WEBAs the person on the standards committee (X3J16) who proposed leaving off the .h, my original intent was to settle the debate over .h, .H, .hpp, .hxx, or .h++ file extensions; or a desire by some that there be no implication in the standard that this was the name of a file on disk in order to allow an IDE to pull pre-compiled header information out of somewhere internal, like a resource file ...
What is the purpose of the h and hh modifiers for printf?
WEBIn the absence of the h or hh modifiers, you would have to mask the values passed to get the correct behaviour reliably. With the modifiers, you no longer have to mask the values; the printf() implementation does the job properly. Specifically, for the format %hx, the code inside printf() can do something like: va_list args;
Difference between <string.h> and <strings.h> - Stack Overflow
WEBNov 27, 2010 · 24. Typically <strings.h> just adds some useful but non-standard additional string functions to the standard header <string.h>. For maximum portability you should only use <string.h> but if you need the functions in <strings.h> more than you need portability then you can use <strings.h> instead of <string.h>.