#include <stdio.h>
    #include <string.h>
    #include <stdlib.h>
    #define MAX_IME 100
    #define MAX_OBLAST 100
    #define MAX_NIZ 700


    struct naucnik {
    char ime[MAX_IME];
    char prezime[MAX_IME];
    char oblast[MAX_OBLAST];
    int br_radova;
    };

    void ucitaj(FILE *ulaz,struct naucnik *niz,int *n);
    void ispis(FILE *izlaz,struct naucnik *niz,int *k,int *n);
    FILE *safe_fopen(char *filename,char *mode,int error_code);




    int main(int arg_num, char *args[]){
    if(arg_num!=4){
    printf("Uputstvo : ./zad input_filename output_filename min_radova\n");
    exit(1);
    }
    struct naucnik niz[MAX_NIZ];
    int n,k;






    char *input_filename=args[1];
    char *output_filename=args[2];
    char *min_radova=args[3];
    k=atoi(min_radova);

    FILE *ulaz=safe_fopen(input_filename,"r",2);
    FILE *izlaz=safe_fopen(output_filename,"w",3);






    ucitaj(ulaz,niz,&n);
    ispis(izlaz,niz,&k,&n);



    fclose(ulaz);
    fclose(izlaz);
    return 0;
    }


    void ucitaj(FILE *ulaz,struct naucnik *niz,int *n)
    {


            int i=0;

        while(fscanf(ulaz, "%s %s %d %s", niz[i].ime,niz[i].prezime, &niz[i].br_radova, niz[i].oblast) != EOF)
        {
        i++;

        }
     *n=i;

    }
    FILE *safe_fopen(char *filename,char *mode,int error_code){
    FILE *f=fopen(filename,mode);
    if(f==NULL){
    puts("Nemre otvoriti");
    exit(error_code);
    }
    return f;
    }

    void ispis(FILE *izlaz,struct naucnik *niz,int *k,int *n){
    int i;
    for(i=0;i<*n;i++){
    if(niz[i].br_radova>*k){
    fprintf(izlaz,"%s\t%s\t%s\t%d\n\n",niz[i].ime,niz[i].prezime,niz[i].oblast,niz[i].br_radova);
    }
    }
    }