pik2/upr

//Author: vsavovpc
#include <stdio.h>
#include <stdlib.h>

 struct student {
     int id;
     char name[50];
     char spec[50];
     double price;
 };

int main()
{
    int input = 0;
    while (scanf("%d",&input))
    {
        if (input == 3)
        {
            break;
        }


        switch (input)
        {
        case 1: {
                FILE *fp;
                int i;
                struct student n;

                if ((fp = fopen("gosho", "wb")) == NULL) {
                    exit(1);
                }

                for (i = 0; i < 1; i++)
                {
                    printf("id: ");
                    fflush(stdin);
                    scanf("%d", &n.id);

                    printf("Name: ");
                    fflush(stdin);
                    scanf("%s", &n.name);

                    printf("Spec: ");
                    fflush(stdin);
                    scanf("%s", &n.spec);

                    printf("price: ");
                    fflush(stdin);
                    scanf("%lf", &n.price);

                    fwrite(&n, sizeof(n), 1,fp);
                }

                fclose(fp);
        }; break;
        case 2:{
                   FILE *fp;
                   fp = fopen("gosho", "rb");
                   struct student n;
                   int id;
                   char name[50];
                   char spec[50];
                   double price = 100000;

                   while (fread(&n, 1, sizeof(n), fp) != NULL){
                       printf("print from reading: id: %d  name: %s  spec: %s   price: %lf\n", n.id ,n.name,  n.spec, n.price);
                       if (price > n.price)
                       {
                            id = n.id;
                            strncpy(name, n.name, 50);
                            strncpy(spec, n.spec, 50);
                            price = n.price;
                       }
                   }

                   printf("Product with min price is: id: %d  name: %s  spec: %s   price: %lf\n", id, name, spec, price);
                   fclose(fp);

        }; break;
        default:
            break;
        }
    }
    return 0;
}