Always use header files to store the struct's and typedef's in your C program

struct and typedef definitions

Because struct definitions and typedef clauses must preceed all variable definitions:

A very common practice in C programming is to put struct definitions and typedef clauses in (one of more) header files
And include the header files with struct definitions and typedef clauses as the first include files !!!
(Because the type definitions must preceed all variable definitions and variable declarations)

Example:

Header file: types.h Program file: use-types.c

Header file: `types.h`	Program file: use-types.c
typedef struct BankAccount { int accNum; double balance; } BankAccount_t;	#include <stdio.h> #include "types.h" // Include my type definitions BankAccount_t b; // Now we can define global vars int main(int argc, char *argv[]) { struct BankAccount a; // And also define local variables a.accNum = 123; a.balance = 4000; printf("a.accNum = %d a.balance = %f\n", a.accNum, a.balance); b = a; printf("b.accNum = %d b.balance = %f\n", b.accNum, b.balance); }

typedef struct BankAccount { int accNum; double balance; } BankAccount_t;

#include <stdio.h>

#include "types.h" // Include my type definitions

BankAccount_t b;   // Now we can define global vars

int main(int argc, char *argv[])
{
   struct BankAccount a;  // And also define local variables

   a.accNum = 123;
   a.balance = 4000;

   printf("a.accNum = %d  a.balance = %f\n", a.accNum, a.balance);

   b = a;
   printf("b.accNum = %d  b.balance = %f\n", b.accNum, b.balance);
}

Example Program: (Demo above code)
- Prog files: /home/cs255001/demo/C/set2/types.h and /home/cs255001/demo/C/set2/use-types.c
How to run the program: