void strcpy(char target[], const char source[]) {
    while (*target++ = *source++);
}

int strcmp(const char lhs[], const char rhs[]) {
    while (*lhs || *rhs) {
        if (*lhs++ != *rhs++) {
            return *(lhs - 1) - *(rhs - 1);
        }
    }
    return 0;
}