structures_and_unions

/****************STRUCTURES*********/

* structures are used to create user-defined data types from c provided data types.

* structure creation

	1.struct abc
	  {
		char ch;
		int  ii;
	  };
	
	  struct abc var;
	

	2.typedef struct abc
	  {
		char ch;
		int  ii;
	  }var;

	var.ch = 'a';
	var.ii = 12;
	
	struct abc var = {
  				.ch = 'b',
				.ii = 12,
			 }