База данных

#include <stdio.h>
#include <conio.h>
#include <string.h>
struct stud{
char fam[30];
char gruppa[30];
char kafedra[30];};
void main (void){
struct stud x[50],art,aux;
int i,n,q,k;
char search[30],r,w;
FILE *f1;
 
m0: clrscr();
printf("\n\n\t***MENU***\n\n");
printf("\t1: Zapolnenie BD\n");
printf("\t2: Chtenie BD iz faila\n");
printf("\t3: Vvod novoi zapisi v BD\n");
printf("\t4: Poisk po BD\n");
printf("\t5: Rasstaviti BD v obratnom poreadke\n");
printf("\t6: Exit\n\t");
scanf("%d",&q);
switch(q){
case 1: goto m1;
case 2: goto m2;
case 3: goto m3;
case 4: goto m4;
case 5: goto m5;
case 6: goto m6;
default: goto m0;}
 
m1: clrscr();
printf("\n\nVvedite chislo studentov: ");
scanf("%d",&n);
for(i=0;i<n;i++){
printf("\nVvedite familiiu studenta %d: ",i);
scanf("%s",&x[i].fam);
printf("\nVvedite nazvanie gruppi %d: ",i);
scanf("%s",&x[i].gruppa);
printf("\nVvedite nazvanie kafedri %d: ",i);
scanf("%s",&x[i].kafedra);}
 
f1=fopen("baza.txt","w");
for(i=0;i<n;i++){
fwrite(&x[i],sizeof(x[i]),1,f1);}
fclose(f1);
printf("\nZapolnennaea BD sohranena v faile \"baza.txt\"\n");
printf("\nPress any key\n");
getch(); goto m0;
 
m2: clrscr();
printf("\n\n\t***Vivod bazi na monitor***\n\n");
printf("\t|-------------------------------------------|\n");
printf("\t|  Familiea studenta  |  Gruppa  |  Kafedra |\n");
printf("\t|-------------------------------------------|\n");
f1=fopen("baza.txt","r"); i=0;
while(fread(&x[i],sizeof(x[i]),1,f1)==1){
printf("\t|%21s|%10s|%10s|\n",x[i].fam,x[i].gruppa,x[i].kafedra); i++;
printf("\t|-------------------------------------------|\n");}
fclose(f1);n=i;
printf("\n\tPress any key\n");
getch(); goto m0;
 
m3: clrscr();
printf("\nHotite dobaviti novuiu zapisi? y/n\n");
w=getch();
if((w=='n')||(w=='N')){goto m0;}
if((w=='y')||(w=='Y')){
printf("\nVvedite familiiu studenta %d: ",i);
scanf("%s",&aux.fam);
printf("\nVvedite nazvanie gruppi %d: ",i);
scanf("%s",&aux.gruppa);
printf("\nVvedite nazvanie kafedri %d: ",i);
scanf("%s",&aux.kafedra);
 
f1=fopen("baza.txt","a");
for(i=0;i<n;i++){
fwrite(&aux,sizeof(aux),1,f1);}
fclose(f1);
printf("\nZapisi bila dobavlena v konets faila\n");
printf("\nPress any key\n");
getch(); goto m0;}
 
m4: clrscr();
f1=fopen("baza.txt","r"); i=0;
while(fread(&x[i], sizeof(x[i]),1,f1)==1){i++;}
n=i; fclose(f1);
printf("\nPoisk po familii\nVvedite iskomuiu familiiu: ");
scanf("%s",&search);
printf("\n\n\t***Rezulitat poiska:***\n\n");
printf("\t|-------------------------------------------|\n");
printf("\t|  Familiea studenta  |  Gruppa  |  Kafedra |\n");
printf("\t|-------------------------------------------|\n");
k=0;
for(i=0;i<n;i++){
if(strcmp(x[i].fam,search)==0){ k++;
printf("\t|%21s|%10s|%10s|\n",x[i].fam,x[i].gruppa,x[i].kafedra); i++;
printf("\t|-------------------------------------------|\n");}}
if(k==0){ printf("\nTakogo studenta net v BD\n"); }
printf("\nPress any key\n");
getch(); goto m0;
 
m5: clrscr();
f1=fopen("baza.txt","r"); i=0;
while(fread(&x[i], sizeof(x[i]),1,f1)==1){i++;}
n=i; fclose(f1);
for (k=0;k<n-1;k++){
art=x[k]; x[k]=x[n-k-1]; x[n-k-1]=art;}
 
printf("\n\n\t***Uporeadochennaea BD***\n\n");
printf("\t|-------------------------------------------|\n");
printf("\t|  Familiea studenta  |  Gruppa  |  Kafedra |\n");
printf("\t|-------------------------------------------|\n");
for(i=0;i<n;i++){
printf("\t|%21s|%10s|%10s|\n",x[i].fam,x[i].gruppa,x[i].kafedra);
printf("\t|-------------------------------------------|\n");}
printf("\n\tPress any key\n");
getch(); goto m0;
 
m6: clrscr();
printf("\nPress any key\n");
getch();}