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| #include "stdafx.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <io.h>
#define M [10];
#ifndef _lab11_cpp
#define _lab11_cpp
typedef struct TExport
{
char name_tov[50];
char kor_opis[50];
char country[50];
float rubl;
}str;
//----------------------------------------
//Прототипы функция
int create(char *name);//Создание базы данных
int add(char *name);//Новый товар
int print(char *name);//Показать базу данных
int find(char *name, char *tovar);//нахождение элемента
int del(char *name, int k);//удаление
int change(char *name, int n);//Изменение товара
void displayE(str E);
void input(str *pE);
int displayN(char *name, int n);
void sort();//сортировка по алфавиту
//-----------------------------------------
int _tmain(int argc, _TCHAR* argv[])
{
char number M;
char name[] = "D:\\base.dat";
int k, n;
char tovar[20];
while(1)
{
printf("\n\t1.Create newbase\n");
printf("\n\t2.Add new tovar\n");
printf("\n\t3.Delete tovar\n");
printf("\n\t4.Find tovar\n");
printf("\n\t5.Change tovar\n");
printf("\n\t6.Sort tovar\n");
printf("\n\t7.Show all tovar\n");
printf("\n\t8.End work\n");
//Обработка номера команды
printf("\n\nEnter number of operation\t");
scanf("%s", number);
switch(number[0])
{
case '1' :
create(name);
break;
case '2' :
add(name);
break;
case '3' :
printf("\n Delete according to the name_tov \n");
printf("\n Enter the name_tov: \t");
scanf("%s", tovar);
k = find(name, tovar);
if(k > 0)
del(name, k);
break;
case '4' :
printf("\n Find according to the name_tov \n");
printf("\n Enter the name_tov: \t");
scanf("%s", tovar);
n = find(name, tovar);
if(n > 0)
displayN(name, n);
break;
case '5' :
printf("\n Change according to the name_tov \n");
printf("\n Enter the name_tov: \t");
scanf("%s", tovar);
k = find(name, tovar);
if(k > 0)
change(name, k);
break;
case '7' :
print(name);
break;
case '6' :
break;
case '8' :
return 0;
default :
printf("\nNumber is not correct\n");
}
}
return 0;
}
int create(char *name)
{
FILE*f;
str a;
int i, n;
if ((f = fopen(name, "w"))== NULL)
{
printf("Error %s\n", name);
return 1;
}
printf("\nHow much elements in database? = \t");
scanf("%d", &n);
for(i = 0; i < n; i++);
{
input(&a);
fwrite(&a, sizeof(str), 1, f);
}
fclose(f);
return 0;
}
void displayE(str E)
{
printf("\nName_tov: %s\n", E.name_tov);
printf("\nDescription: %s\n", E.kor_opis);
printf("\nCountry: %s\n", E.country);
printf("\nRubl: %f\n", E.rubl);
}
void input(str *pE)
{
printf("\nName_tov: ");
scanf("%s", pE->name_tov);
printf("\nDescription: ");
scanf("%s", pE->kor_opis);
printf("\nCountry: ");
scanf("%s", pE->country);
printf("\nRubl: ");
scanf("%f", &pE->rubl);
}
int print(char *name)
{
FILE*f;
str a;
if ((f = fopen(name, "r"))== NULL)
{
printf("Error %s\n", name);
return 1;
}
while(!feof(f))
{
fread(&a, sizeof(str), 1, f);
if(!feof(f))
displayE(a);
}
fclose(f);
return 0;
}
int find(char *name, char *tovar)
{
FILE*f;
str a;
int i = 0;
if ((f = fopen(name, "r"))== NULL)
{
printf("Error %s\n", name);
return -1;
}
while(!feof(f))
{
fread(&a, sizeof(str), 1, f);
if(!feof(f))
{
if(strcmp(a.name_tov, tovar) == 0)
{
fclose(f);
return i+1;
}
i++;
}
}
fclose(f);
return 0;
}
int add(char *name)
{
FILE*f;
str a;
int i, n;
if ((f = fopen(name, "r+"))== NULL)
{
printf("Error %s\n", name);
return 1;
}
input(&a);
fseek(f , 0, SEEK_END);
fwrite(&a, sizeof(str), 1, f);
fclose(f);
return 0;
}
int displayN(char *name, int n)
{
FILE*f;
str a;
int i;
if ((f = fopen(name, "r+"))== NULL)
{
printf("Error %s\n", name);
return 1;
}
fseek(f, (n-1)*sizeof(str), SEEK_SET);
fread(&a, sizeof(str), 1, f);
displayE(a);
fclose(f);
return 0;
}
int change(char *name, int n)
{
FILE*f;
str a;
int i = n;
if ((f = fopen(name, "r+"))== NULL)
{
printf("Error %s\n", name);
return 1;
}
displayN(name, n);
input(&a);
fseek(f, (n-1)*sizeof(str), SEEK_SET);
fwrite(&a, sizeof(str), 1, f);
fclose(f);
return 0;
}
int del(char *name, int k)
{
FILE*f;
int i;
long int n;
str a;
if ((f = fopen(name, "r+")) == NULL)
{
printf("Error %s\n", name);
return 1;
}
n = filelength(fileno(f)) / sizeof(str);
if((k > n) || (k < 0))
{
printf("Not found %d \n", k);
fclose(f);
return 2;
}
for(i = k; i < n; i++)
{
fseek(f, i*sizeof(str), SEEK_SET);
fread(&a, sizeof(str), 1, f);
fseek(f, (i-1)*sizeof(str), SEEK_SET);
fwrite(&a, sizeof(str), 1, f);
}
chsize(fileno(f), filelength(fileno(f)) - sizeof(str));
fclose(f);
return 0;
}
#endif |
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