C ++ ostream char **

Question

我建了一個類Client ，我想ostream吧。 這是課程：

class Client {
    MyString id;
    MyString full_name;
    char gender;
    unsigned short age;
    unsigned short hobbies_num;
    char** hobbies_list;

這是我已經編寫的代碼：

ostream& operator<<(ostream& osc, const Client& for_print)
{
    return osc << for_print.id << endl << for_print.full_name << endl << for_print.gender << endl << for_print.age << endl << for_print.hobbies_num << endl;
}

我的問題是如何打印最后一個成員hobbies_list ，即二維字符動態數組？

Answer 1

使用for循環。

for (int i = 0; i < for_print.hobbies_num; i++) {
    osc << for_print.hobbies_list[i] << endl;
}

Answer 2

使用標准算法std::for_each ：

std::ostream& operator<<(std::ostream& osc, const Client& for_print)
{
    osc << for_print.id << endl << for_print.full_name << endl << for_print.gender << endl << for_print.age << endl << for_print.hobbies_num << endl;
    for_each(for_print.hobbies_list, for_print.hobbies_list + for_print.hobbies_num, [&](char* x){osc << x << endl; });
    return osc; 
}