gistfile1.c

void write()    //Pretty much whole function is self explanatory
{
    char str[1000];

    FILE* f = fopen("input.bin", "wb");
    if(f == NULL)
    {
        perror("File opening error\n");
        exit(1);
    }

    fseek(f, 0, SEEK_SET);
    int i;
    for (i = 0; i < size; i++)
    {
        fprintf(f, "%s;%s;%s;%s", foo[i].kid, foo[i].jid, foo[i].name, foo[i].time);
    }
    fclose(f);

}

void read(char* filename)
{
    fp = fopen(filename, "rb");
    int i = 0;

    while (!feof(fp))
    {
        if (fp==NULL)
        {
                perror("File opening error\n");
                exit(1);
        }

        fscanf(fp,"%[^;]; %[^;]; %20[^\;]; %18[^\;]", foo[i].kid, foo[i].jid,foo[i].name, foo[i].time); //Little edit  when taking the "time string" not to cut-off after first ' '
        i++;
    }


    size = i;

    fclose(fp);
}