C struct, typedef, enum & union - Tenouk C & C++

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STRUCT, TYPEDEF, ENUM & UNION• The macro __FILE_NAME_EXTENSION__ indicates thatthe file has been included once already.• Its name should begin with '__' to avoid conflicts with userprograms, and it should contain the name of the file andsome additional text, to avoid conflicts with other headerfiles.• In our example, the #ifndef statements should be,#ifndef __MYHEADERFILE_H__#define __MYHEADERFILE_H__Declaration and definition go here#endif /* __MYHEADERFILE_H__ */www.tenouk.com, © 48/93
STRUCT, TYPEDEF, ENUM & UNION• Step: So, our header file, myheaderfile.h content should besomething like the following.#ifndef __MYHEADERFILE_H__#define __MYHEADERFILE_H__// declare a structure with 3 membersstruct inventory{int nPartNo;float fBuyCost;float fSellingPrice;myheaderfile.txt};// function prototypes, both will receive a// pointer// to inventory structurevoid readpart(struct inventory *pPartPtr);void printpart(struct inventory *pPartPtr);#endif /* __MYHEADERFILE_H__ */www.tenouk.com, © 49/93
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C struct, typedef, enum & union - Tenouk C & C++

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