/* kreator, system admins inc.
Sat May 23 09:42:02 CEST 1998
Linux amanda 2.1.102 #6 Fri May 22 18:52:56 CEST 1998 i486 unknown
Debian GNU/Linux 2.0 amanda
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* #include <conio.h> */

/* data structure definition */
typedef struct
{
	char full_name[40+1];
	int score;
	float time;
} data_t;

/* on-error function */
void fatal(const char *msg)
{
	puts(msg);
	exit(EXIT_FAILURE);
}

/* data file initialisation and loading */
void data_init(FILE *input, FILE *output)
{
	data_t tmp;
	memset((data_t *) &tmp, 0, sizeof(data_t));
	while (fscanf(input,"%s",tmp.full_name)!=EOF)
		fwrite(&tmp,sizeof(data_t),1,output);
	puts("data initialised..");
}

/* data entry */
void load_data(FILE *dat)
{
	data_t tmp,junk;

	printf("enter new data:\n(to end enter 'end' for name)\n");
	do
	{
		fseek(dat,0L,SEEK_SET);
		printf("enter name of participant: ");
		scanf("%s", tmp.full_name);
		if (!strcmp("end",tmp.full_name)) break;
		while(fread(&junk,sizeof(junk),1,dat))
		{
			if (!strcmp(tmp.full_name,junk.full_name))
			{
				printf("enter score ");
				scanf("%d", &tmp.score);
				printf("enter time ");
				scanf("%f", &tmp.time);
				fseek(dat,-sizeof(data_t),SEEK_CUR);
				fwrite(&tmp,sizeof(data_t),1,dat);
				break;
			}
		}
	} while(1);
}

/* main function */
int main(void)
{
	FILE *input, *output;
	
	if (!(input=fopen("PETROVIC","rt"))) fatal("I/O error");
	if (!(output=fopen("TANJA","w+b"))) fatal ("I/O error");

	data_init(input,output);
	load_data(output);

	fclose(input);
	fclose(output);
	return(EXIT_SUCCESS);
}