//---------------------------------------------------------------
// EXAMPLE EX10.C :  Demonstrate use of STRUCTURES.
//
// C.P. Diduch, Dec 1999.
//---------------------------------------------------------------
#define	KEY_PA	0x138	 // 82C55A port addresses for PA,
#define KEY_PB	0x13A	 // PB,
#define KEY_PC	0x13C	 // PC and the
#define KEY_CON	0x13E	 // Control Register.

#include <conio.h> 	 // conio.h contains prototypes for 
			 // inportb() and outportb().
//---------------------------------------------------------------
struct Grade {
   char test;
   char lab[5];
   char final;
   };

struct Grade HARRY = {75,8,7,4,9,9,80};
// Initializes HARRY.test = 10, HARRY.labs[] = {8,7,4,9,9}
// and HARRY.final = 30

void main()
{
int i;
unsigned char total;

outportb(KEY_CON, 0x82); // Initialize 82C55A PPI with ports 
			 // KEY_PC and KEY_PA as OP ports and 
			 // port PB as an IP port.

total = (2*HARRY.test/10) + (7*HARRY.final/10);
i = 0;
for (i = 0; i < 5; i++) {
   total = total + (2*HARRY.lab[i]/10);
   }

outport(KEY_PC, total);
}