pvjc24/cv5/program.c

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

#define SIZE 100

struct student {
    char name[SIZE];
    int score;
};
int compar(const void*,const void*);
int loading_the_entire_line_from_standard_input_into_the_helper_field_and_verify_that_i_have_loaded_it_correctly(struct student *databaza,int *size_ptr);
void parce_line_and_save_into_database(char line[],struct student *databaza, int *size_ptr);
int retriving_integer(char *line,char** end);
int find_index(struct student databaza[],int size, const char *xxx);
void adding_an_item_to_the_database(struct student databaza[],int *size_ptr, const char* name,int score);

int main()
{
    struct student databaza[SIZE];
    memset(databaza,0,SIZE*sizeof(struct student));
    int size = 0;
    while(loading_the_entire_line_from_standard_input_into_the_helper_field_and_verify_that_i_have_loaded_it_correctly(databaza,&size)){
    }
    int element_size=SIZE+sizeof(int);
    qsort((void *)databaza, size,element_size,compar);
    printf("Vysledky:\n");
    for(int i=0; i<size; i++){
        printf("%d %s\n",databaza[i].score,databaza[i].name);
    }

    return 0;
}



int loading_the_entire_line_from_standard_input_into_the_helper_field_and_verify_that_i_have_loaded_it_correctly(struct student *databaza,int *size_ptr){
    char line[SIZE];
    memset(line,0,SIZE);
    char* r = fgets(line,SIZE,stdin);
    if (r == NULL||strlen(r)==1){
        return 0;
    }
    parce_line_and_save_into_database(line,databaza,size_ptr);
    return 1;
}
void parce_line_and_save_into_database(char line[],struct student *databaza, int *size_ptr){
    char* end = NULL;
    int score=retriving_integer(line,&end);
    if(score==0){
        return;
    }
    char name[SIZE];
    memset(name,0,SIZE);
    end += 1;
    int velkost_mena = strlen(end) - 1;
    if (velkost_mena > 0){
        memcpy(name,end,velkost_mena);
    }
    else {
        return;
    }
    adding_an_item_to_the_database( databaza, size_ptr, name, score);
}

int retriving_integer(char *line,char** end){

    int value = strtol(line,end,10);
    if (value == 0){
        return 0;
    }
    return value;
}
int find_index(struct student databaza[],int size, const char *xxx){
        for(int i=0; i<size; i++){
            if(strcmp(databaza[i].name,xxx)==0){
                return i;
            }
        }
    return -1;
}

void adding_an_item_to_the_database(struct student databaza[],int *size_ptr, const char* name,int score){
    int size_of_Name= strlen(name);
    int id = find_index(databaza,*size_ptr,name);
    if (id< 0){
        memcpy(databaza[*size_ptr].name,name,size_of_Name);
        databaza[*size_ptr].score=score;
        *size_ptr+=1;
    }else {
        databaza[id].score+=score;
    }
}
int compar(const void* a,const void* b){
    const struct student * a_ptr = a;
    const struct student * b_ptr = b;
    if(a_ptr->score < b_ptr->score) {
        return 1;
    }
    if(a_ptr->score > b_ptr->score) {
        return -1;
    }
    if(a_ptr->score == b_ptr->score){
        return strcmp(a_ptr->name, b_ptr->name);
    }
}