how to make header file by using user define function?

Question

full process of making header files .

Answer 1

First, SoloLearn playground doesn't support multiple files in a progran so you can't do it here. Normally, you enclose the source with an if statement so it can be included many times yet only generate a single set of definitions. The definitions are sorted in sections: constants, types, variables, and functions. The following lines could be in myheader.h:

#ifndef _MYHEADER_H
#define _MYHEADER_H 1
#define MYCONST 5
typedef struct {int a; int b;} mytype;
extern mytype myvariable;
extern int myfunction(mytype parameter);
#endif /* myheader.h */