Bin Complement

void BinComplement(char *data)
{
    char tmp[strlen(data) + 1];
    memset(tmp, 0, sizeof tmp);

    printf("\n%s\n", data);

    for (int x = 0; x < strlen(data); x++)
    {
        tmp[x] = data[x] ^ 1;
    }

    strcpy(data, tmp);

    printf("%s\n\n", tmp);
}