C Simple Programs

Accessing Structure Members

#include

#include

#include

 struct Books

{

   char  title[50];

   char  author[50];

   char  subject[100];

   int   book_id;

};

int main( )

{

   struct Books Book1;       

   struct Books Book2;       

   strcpy( Book1.title, "C Programming");

   strcpy( Book1.author, "Nuha Ali");

   strcpy( Book1.subject, "C Programming Tutorial");

   Book1.book_id = 6495407;

   strcpy( Book2.title, "Telecom Billing");

   strcpy( Book2.author, "Zara Ali");

   strcpy( Book2.subject, "Telecom Billing Tutorial");

   Book2.book_id = 6495700;

   printf( "Book 1 title : %s\n", Book1.title);

   printf( "Book 1 author : %s\n", Book1.author);

   printf( "Book 1 subject : %s\n", Book1.subject);

   printf( "Book 1 book_id : %d\n", Book1.book_id);

   printf( "Book 2 title : %s\n", Book2.title);

   printf( "Book 2 author : %s\n", Book2.author);

   printf( "Book 2 subject : %s\n", Book2.subject);

   printf( "Book 2 book_id : %d\n", Book2.book_id);

   return 0;

}

Structures as Function Arguments

#include 

#include

#include 

struct Books

{

   char  title[50];

   char  author[50];

   char  subject[100];

   int   book_id;

};

void printBook( struct Books book );

int main( )

{

   struct Books Book1;        

   struct Books Book2;        

   strcpy( Book1.title, "C Programming");

   strcpy( Book1.author, "Nuha Ali"); 

   strcpy( Book1.subject, "C Programming Tutorial");

   Book1.book_id = 6495407;

   strcpy( Book2.title, "Telecom Billing");

   strcpy( Book2.author, "Zara Ali");

   strcpy( Book2.subject, "Telecom Billing Tutorial");

   Book2.book_id = 6495700;

   printBook( Book1 );

   printBook( Book2 );

   return 0;

}

void printBook( struct Books book )

{

   printf( "Book title : %s\n", book.title);

   printf( "Book author : %s\n", book.author);

   printf( "Book subject : %s\n", book.subject);

   printf( "Book book_id : %d\n", book.book_id);

}

Pointers to Structures

#include 

#include

#include 

struct Books

{

   char  title[50];

   char  author[50];

   char  subject[100];

   int   book_id;

};

void printBook( struct Books *book );

int main( )

{

   struct Books Book1;        

   struct Books Book2;        

   strcpy( Book1.title, "C Programming");

   strcpy( Book1.author, "Nuha Ali"); 

   strcpy( Book1.subject, "C Programming Tutorial");

   Book1.book_id = 6495407;

   strcpy( Book2.title, "Telecom Billing");

   strcpy( Book2.author, "Zara Ali");

   strcpy( Book2.subject, "Telecom Billing Tutorial");

   Book2.book_id = 6495700;

   printBook( &Book1 );

   printBook( &Book2 );

   return 0;

}

void printBook( struct Books *book )

{

   printf( "Book title : %s\n", book->title);

   printf( "Book author : %s\n", book->author);

   printf( "Book subject : %s\n", book->subject);

   printf( "Book book_id : %d\n", book->book_id);

}

Accessing Union Members

#include 

#include

#include 

union Data

{

   int i;

   float f;

   char  str[20];

};

int main( )

{

   union Data data;        

   data.i = 10;

   data.f = 220.5;

   strcpy( data.str, "C Programming");

   printf( "data.i : %d\n", data.i);

   printf( "data.f : %f\n", data.f);

   printf( "data.str : %s\n", data.str);

   return 0;

}