#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "students.h"


int load_register(Students *reg, const char *filename)
{
    //int count = 0;

    FILE *filu = fopen(filename, "r");
    if (!filu)
        return -1;

    reg->array = NULL;
    reg->count = 0;

    while (1) {

        char namelength = 0;
        size_t s = fread(&namelength, sizeof(char), 1, filu);

        if (namelength <= 0)
            break;

        char *name = calloc((namelength + 1) * sizeof(char), 1);
        fread(name, 1, namelength, filu);
        name[namelength] = '\0';

        char id[8];
        fread(id, 1, 8, filu);

        int age = fgetc(filu);

        char course[16];
        fread(course, 1, 16, filu);

        int numpoints = fgetc(filu);

        float *points = malloc(numpoints * sizeof(float));
        fread(points, numpoints, sizeof(float), filu);

        create_student(reg, name, id, age, course);
        set_points(reg, id, course, points, numpoints);

    }

    fclose(filu);
    return reg->count;

}


int save_register(const Students *reg, const char *filename)
{
    int count = 0;

    FILE *filu = fopen(filename, "w");
    if (!filu)
        return -1;

    for(unsigned int i = 0; i < reg->count; i++) {

        unsigned char length = strlen(reg->array[i].name);

        fwrite(&length, 1, 1, filu);
        fwrite(reg->array[i].name, sizeof(char),length, filu);
        fwrite(reg->array[i].id, 8, 1, filu);
        fputc(reg->array[i].age, filu);
        fwrite(reg->array[i].course, 16, 1, filu);
        fputc(reg->array[i].numPoints, filu);
        fwrite(reg->array[i].points, sizeof(float), reg->array[i].numPoints, filu);

        count++;

    }
    fclose(filu);
    return count;
}
src/main.c
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#include <stdio.h>