#include <stdio.h>
#include <stdlib.h>
#define MAXS 20
#define MAXTS 100

typedef struct student{
	char ime[MAXS];
	char prezime[MAXS];
	float prosek;
} STUDENT;

int poredistud(const void *a, const void *b){
	STUDENT *a1= (STUDENT *)a;
	STUDENT *b1= (STUDENT *)b;
	return strcmp(a1->prezime,b1->prezime);
}

int main(){
	FILE *ulaz;
	STUDENT *studenti;
	int n=0;
	int i=0;
	STUDENT trazeni,*pronadjeni;
	char privr[MAXTS];
	ulaz=fopen("studenti.txt","r");
	if(ulaz==NULL)
		exit(EXIT_FAILURE);	
	while((fgets(privr,MAXTS,ulaz))!=NULL){
		n++;
	}
	n--;
	studenti=(STUDENT*)malloc(sizeof(STUDENT)*n);
	if(studenti==NULL)
		exit(EXIT_FAILURE);
	fseek(ulaz,0L,SEEK_SET);
	for(i=0; i<n; i++){
		fscanf(ulaz,"%s %s %f",studenti[i].prezime, studenti[i].ime, 
		&studenti[i].prosek);
	}
	for(i=0; i<n; i++){
		printf("%s %s %f\n",studenti[i].prezime, studenti[i].ime, 
		studenti[i].prosek);
	}
	printf("Uneti prezime i ime studenta:\n");
	scanf("%s %s",trazeni.prezime,trazeni.ime);
	pronadjeni=(STUDENT*)bsearch(&trazeni,studenti,n,sizeof(STUDENT),poredistud);
	printf(" %f\n",pronadjeni->prosek);
	free(studenti);
	fclose(ulaz);
	return 0;
}