#include <stdio.h>
#include <stdlib.h>

const MAX_STR_LEN =  20 ;

struct record {
	int key;
	char name[MAX_STR_LEN];
	char country[MAX_STR_LEN];
	int price;
	bool presents;
};

struct record recordSet[ 11 ];

void create(void){
	FILE * db;
	if ((db = fopen("db.dat","a+b")) = NULL) {
		fputs("Failed to open database file", stderr);
		exit( 1 );
	}
	rewind(db);

	for(int i= 0 ; i< 2 ; i++){
		recordSet[i].key = i;
		printf("Enter the name: ");
		gets(recordSet[i].name);
		printf("Enter the producer country: ");
		gets(recordSet[i].country);
		printf("Enter the price: ");
		scanf("%d", &recordSet[i].price);
		int a;
		printf("Presents? (1 - yes, 0 - no): ");
		scanf("%d", &a);
		recordSet[i].presents = (a= 1 ) ? true : false;
		while(getchar()!='\n')
			continue;
	}
	fwrite(&recordSet,  2 *sizeof(struct record),  1 , db);
	fclose(db);
}

void main(void){
	create();

	FILE * db;
	db = fopen("db.dat","a+b");
	if ((db = fopen("db.dat","a+b")) = NULL) {
		fputs("Can't open database file", stderr);
		exit( 1 );
	}
	rewind(db);
	struct record rs[ 2 ];
	int count =  0 ;
	while(fread(&rs[count], sizeof(struct record),  1 , db)){
		printf("%d %s %s %d", rs[count].key, rs[count].name, rs[count].country, rs[count].price);
		count++;
	}
}