//Create a structure with name _avistdindex_chunk which is typedefined;

typedef struct _avistdindex_chunk

		 //Begins the structure;

{

		//Creates a member of the structure which is an array of characters which at most 3 characters;

char fcc[4];

		//ends the structure with and thetypedef keyword
	//converts the entire structureto be represented by avisrdindex_chunk

} avistdindex_chunk;