Домаћи

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

#define EXIT_NO_MEMORY   2
#define EXIT_NO_IN_FILE  3
#define EXIT_NO_OUT_FILE 4

#define MAX_NAME         (20 + 1)
#define MAX_SURNAME      (30 + 1)

typedef struct musterija_st{
    char ime[MAX_NAME];
    char prezime[MAX_SURNAME];
    unsigned int br_artikala;
    double pazar;
    struct musterija_st *left;
    struct musterija_st *right;
}MUSTERIJA;

void tree_init(MUSTERIJA**);
void destroy_tree(MUSTERIJA**);
MUSTERIJA* make_musterija(char*,char*,unsigned int,double);
void add_to_tree(MUSTERIJA**,MUSTERIJA*);

FILE* safe_open(char*,char*,int);
void load(FILE*,MUSTERIJA**);
void save_fast(FILE*,MUSTERIJA*,double*,int);
void fprint_(FILE*);
void fprint_sum(FILE*,double);
void save(FILE*,MUSTERIJA*,double*,int);

int main(int argc, char** argv){
    if(argc != 4){
        printf("Nepravilan poziv programa.\n");
        return EXIT_FAILURE;
    }else{
        MUSTERIJA *koren;
        FILE      *file = safe_open(argv[1],"r",EXIT_NO_IN_FILE);
        double     sum  = 0;
        tree_init(&koren);
        load(file,&koren);
        fclose(file);
        file = safe_open(argv[2],"w",EXIT_NO_OUT_FILE);
        save_fast(file,koren,&sum,atoi(argv[3]));
        fprint_(file);
        fprint_sum(file,sum);
        fprintf(file,"\n\n");
        sum = 0;
        save(file,koren,&sum,atoi(argv[3]));
        fprint_(file);
        fprint_sum(file,sum);
        fclose(file);
        destroy_tree(&koren);
        return EXIT_SUCCESS;
    }
}

void tree_init(MUSTERIJA** koren){
    *koren = NULL;
    return;
}

void destroy_tree(MUSTERIJA** koren){
    if(*koren != NULL){
        destroy_tree(&(*koren)->left);
        destroy_tree(&(*koren)->right);
        free(*koren);
        *koren = NULL;
    }
    return;
}

MUSTERIJA* make_musterija(char* name,char* sname,unsigned int br_art,double pazar){
    MUSTERIJA* new = (MUSTERIJA*)malloc(sizeof(MUSTERIJA));
    if(new == NULL){
        printf("Nema dovoljno memorije.\n");
        exit(EXIT_NO_MEMORY);
    }
    strcpy(new->ime,name);
    strcpy(new->prezime,sname);
    new->br_artikala = br_art;
    new->pazar       = pazar;
    new->left        = NULL;
    new->right       = NULL;
    return new;
}

void add_to_tree(MUSTERIJA** koren,MUSTERIJA* new){
    if(*koren == NULL){
        *koren = new;
    }else{
        if((*koren)->br_artikala > new->br_artikala){
            add_to_tree(&(*koren)->left,new);
        }else{
            add_to_tree(&(*koren)->right,new);
        }
    }
    return;
}

FILE* safe_open(char* name,char* mode,int err_code){
    FILE* f = fopen(name,mode);
    if(f == NULL){
        printf("Nije moguce ucitati fajl %s.\n",name);
        exit(err_code);
    }
    return f;
}

void load(FILE* file,MUSTERIJA** koren){
    char ime[MAX_NAME],
         prezime[MAX_SURNAME];
    unsigned int br_artikala;
    double pazar;
    while(fscanf(file,"%s %s %u %lf",
                                     ime,
                                     prezime,
                                     &br_artikala,
                                     &pazar) != EOF){
        add_to_tree(koren,make_musterija(ime,prezime,br_artikala,pazar));
    }
    return;
}

void save_fast(FILE* file,MUSTERIJA* koren,double* sum,int br_art){
    if(koren != NULL){
        save_fast(file,koren->left,sum,br_art);
        if(koren->br_artikala < br_art){
            fprintf(file,"%7.2lf %-9s %s\n",
                                       koren->pazar,
                                       koren->ime,
                                       koren->prezime);
            *sum += koren->pazar;
        }
        save_fast(file,koren->right,sum,br_art);
    }
    return;
}

void fprint_(FILE* file){
    int i = 0;
    for(;i < 30; i++){
        fprintf(file,"-");
    }
    fprintf(file,"\n");
    return;
}

void fprint_sum(FILE* file,double sum){
    fprintf(file,"%7.2lf",sum);
    return;
}

void save(FILE* file,MUSTERIJA* koren,double* sum,int br_art){
    if(koren != NULL){
        save(file,koren->left,sum,br_art);
        if(koren->br_artikala >= br_art){
            fprintf(file,"%7.2lf %-9s %s\n",
                                       koren->pazar,
                                       koren->ime,
                                       koren->prezime);
            *sum += koren->pazar;
        }
        save(file,koren->right,sum,br_art);
    }
    return;
}