bilet_9 (Binary_Files)

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>


int main()
{
    FILE* f;
    char str[255];
    f = fopen("BINARY.bin", "wb");
    puts("Enter the sequence:");
    gets_s(str);
    fwrite(str, sizeof(str), 1, f);
    fclose(f);
    f = fopen("BINARY.bin", "rb");
    fread(str, sizeof(str), 1, f);
    puts("File:");
    puts(str);
    fclose(f);
    char new_str[255];
    int cnt = 0;
    for (int i = 0; i < strlen(str); i++)
    {
        if ((int(str[i]) - 48) % 5 != 0)
        {
            new_str[cnt] = str[i];
            cnt++;
        }
    }
    new_str[cnt] = '\0';
    f = fopen("BINARY.bin", "wb");
    fwrite(new_str, sizeof(str), 1, f);
    fclose(f);
    f = fopen("BINARY.bin", "rb");
    fread(str, sizeof(str), 1, f);
    puts("Changed file:");
    puts(str);
    fclose(f);
    return 0;
}