fisier

#include <stdio.h>
#include <conio.h>
#include <string.h>

typedef struct
{
	char cnp[14];
	char nume[30];
	char an;
	int clasa;
	int nrd;
	int note[5];
}elev;
//functia care scrie cate un articol student din fisierul binar f in fisierul text g
void elev_intext( FILE *text, elev *x)
{
	int i;
	fprintf(text," %-15s  %-20s     %c        %d      %d  ", x->cnp, x->nume, x->an, x->clasa, x->nrd);
	for (i = 0; i < x->nrd; i++)
		fprintf(text, "%d ", x->note[i]);
	fprintf(text,"\n");

}

int main()
{
	FILE *f, *g;
	char numef[20], numeg[20], cnpc[14];//cnpc pt cnp-ul cautat
	elev x;
	int  cls, gasitcl, gasitcnp;//cls pt clasa dorita

	printf("Numele primului fisier: ");
	gets_s(numef); if (numef[0] == 0) gets_s(numef);
	f = fopen(numef, "rb");
	if (!f)
		printf("Fisierul 1 nu a putut fi deschis.");
	else
	{
		printf("Nume fisier2= "); gets_s(numeg);
		if (numeg[0] == 0) gets_s(numeg);
		g = fopen(numeg, "wt");
		if (!g)
			printf("Fiserul 2 nu a putut fi deschis.");
		else
		{
			fprintf(g, "\t\t Lista elevilor\n ");
			fprintf(g, " %-15s  %-20s    an     clasa   nrd \n", "cnp", "nume");
			fseek(f, 0, 0);
			fread(&x, sizeof(elev), 1, f);
			while (!feof(f))
			{
				elev_intext(g, &x);
				fread(&x, sizeof(elev), 1, f);
			}

			//afisarea elevilor dintr-o anumita clasa introdusa de la tastatura
			fprintf(g, "\nAfisarea elevilor dupa o anumita clasa ");
			printf("\n clasa dorita= "); scanf("%d", &cls);
			while (!feof(stdin))
			{
				gasitcl = 0;
				fseek(f, 0, 0);
				fread(&x, sizeof(elev), 1, f);
				while (!feof(f))
				{
					if (x.clasa == cls)
					{
						if(gasitcl==0)
						  fprintf(g, "\n Lista elevilor din clasa %d\n ", cls);
						elev_intext(g, &x);
						gasitcl = 1;

					}
					fread(&x, sizeof(elev), 1, f);
				}
				if (gasitcl == 0)
					fprintf(g, "\nNu s-a gasit niciun elev in clasa %d", cls);
				printf("\n clasa dorita= "); scanf("%d", &cls);
			}


			//gasirea unui elev dupa cnp
			fprintf(g, "Gasirea unui elev dupa cnp");
			printf("Cnp-ul elevului= "); gets_s(cnpc);
			if (cnpc[0] == 0) gets_s(cnpc);
			while (!feof(stdin))
			{
				gasitcnp = 0;
				fseek(f, 0, 0);
				fread(&x, sizeof(elev), 1, f);
				while (!feof(f))
				{
					if (strcmp(x.cnp, cnpc) == 0)
					{
						elev_intext(g, &x);
						gasitcnp = 1;
					}
					fread(&x, sizeof(elev), 1, f);
				}
				if (gasitcnp == 0)
					fprintf(g, "Nu exista un elev cu cnp-ul %s", cnpc);
				printf("Cnp-ul elevului= "); gets_s(cnpc);
				if (cnpc[0] == 0) gets_s(cnpc);
			}

			fclose(g);
		}

		fclose(f);
	}

	printf("\n\nGata, apasa o tasta ");
	_getch();

	return 0;
}