问题
I am trying to understand C++. Can anybody explain what this code does exactly, I understood that it is some type of setter and getter in Java but I am not sure.
Comm::Comm(const char* id)
{
strcpy(this->id, id);
}
char* Comm::getId()
{
return id;
}
回答1:
What does this code do?
It burns the eyes of children.
The assumption here is that the class Comm has a member variable of type char* or char[N]. There is no "setter" per se, but Comm's constructor attempts to copy its input to that member variable. The getId function is a getter for this member variable.
Depending on the rest of the code, this could be totally flawed due to lack of memory allocation, lack of memory de-allocation, and lack of copy semantics. At best the member is an array and then the lack of range checking in the strcpy call is a serious security risk.
The class would be much better redesigned with the use of std::string.
I would not encourage you to learn from this code snippet.
Instead, learn from a good book.
来源：https://stackoverflow.com/questions/20939163/c-classes-getting-value-using-pointers-and-strcpy