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

int main()
{
    int cevap;
    system("color f2");
    FILE *fp;
    fp=fopen("kayit.txt","a");
    baslangic:
    printf("urun girmek icin 1 cikmak icin 2 giriniz \n");
    scanf("%d",&cevap);
    system("cls");
    if(cevap==1){
         struct urun{
           char marka[20];
           char model[20];
           int serino;
           char turu[20];
           }urun;
    if(fp==NULL){
                                          fp=fopen("kayit.txt","w+");
                                          fprintf(fp,"model\tmarka\ttur\tserino\n");
                                          fclose(fp);
                                          }
    else{
                                          
    printf("urun modeli => ");
    scanf("%s",&urun.model);
    printf("urun markasi => ");
    scanf("%s",&urun.marka);
    printf("urun turu => ");
    scanf("%s",&urun.turu);
    printf("urun seri numarasi => ");
    scanf("%s",&urun.serino);
    fprintf(fp,"%s %s %s %d \n",urun.marka,urun.model,urun.turu,urun.serino);
    fclose(fp);
    system("cls");
    goto baslangic;
}
}

    else if(cevap==2){
    system("exit");
                     }
    else{
         printf("yanlis cevap \n");
         goto baslangic;
         }
         
    return 0;
}