Always store struct definitions and typedef definitions in header files

  • Example header file for the BankAccount data type: 

     // Filename: bankaccount.h
 #ifndef bankaccount_h
 #define bankaccount_h

 struct BankAccount 
 {   
   int   ID;
   float balance;
 };

 typedef  struct BankAccount BankAccount_t;

 #endif

  • C programs that wants to define BankAccount variables will use: 

      #include "bankaccount.h"

    to obtain the struct BankAccount data type definition

DEMO: demo/C/set2/types.h + demo/C/set2/use-types.c