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Topic: C++ problem (Read 607 times) |
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curt_cobain
Newbie
Posts: 33
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Implement a c++ class such that it allows us
to add data members at runtime.
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towr
wu::riddles Moderator
Uberpuzzler
Some people are average, some are just mean.
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Posts: 13730
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Re: C++ problem
« Reply #1 on: Oct 1st, 2008, 2:03pm » |
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That doesn't really make much sense. Can you elaborate on what exactly you mean by "adding data-members at runtime".
Also the title for this topic really doesn't do anything to distinguish from the dozens of other "C++ problem"s.
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SMQ
wu::riddles Moderator
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Re: C++ problem
« Reply #2 on: Oct 1st, 2008, 7:23pm » |
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Well, since C++ is statically typed there's no way to make dynamic members type safe, so I'd probably keep it darn simple:
class foo {
public:
void set(string name, void * value) { _members[name] = value; }
void * get(string name) { return _members[name]; }
protected:
map<string, void *> _members;
};
--SMQ
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--SMQ
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ic10503
Junior Member
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Re: C++ problem
« Reply #3 on: Oct 1st, 2008, 11:12pm » |
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on Oct 1st, 2008, 7:23pm, SMQ wrote:Well, since C++ is statically typed there's no way to make dynamic members type safe, so I'd probably keep it darn simple:
class foo {
public:
void set(string name, void * value) { _members[name] = value; }
void * get(string name) { return _members[name]; }
protected:
map<string, void *> _members;
};
--SMQ |
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I could not understand your code. Can you please explain what u r trying to do ?
What is _members?
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towr
wu::riddles Moderator
Uberpuzzler
Some people are average, some are just mean.
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Re: C++ problem
« Reply #4 on: Oct 2nd, 2008, 12:35am » |
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on Oct 1st, 2008, 11:12pm, ic10503 wrote:I could not understand your code. Can you please explain what u r trying to do ?
What is _members? |
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It's a map (let's say, associative array). You give it a string and it returns a pointer to the "member" added at runtime. Of course the map is really the member here, and not its key-value pairs.
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