How to initialize an ostrstream object in a user defined class

How can we declare an oststream object in our own user defined class??

I tried this but it didn't work..

Code:

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class myclass
{
char str[80];
std::ostrstream(str,80);
};

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Don't use ostrstream, use std::ostringstream.

Next, why do you want a stringstream as a member of the class?

Quote:

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Originally Posted by laserlight

why do you want a stringstream as a member of the class?

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Just curious!! I was trying to derive my own class from ostrstream class such that it also contains a function for overloaded >> operator, but I couldn't declare an object of type ostrstream in my class. Is it possible??

Quote:

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Originally Posted by juice

I was trying to derive my own class from ostrstream class

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The ostrstream class is deprecated. Is there any special reason why you want to use it?

Quote:

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Originally Posted by juice

such that it also contains a function for overloaded >> operator, but I couldn't declare an object of type ostrstream in my class. Is it possible?

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Yes. You should declare the object as a member:

Code:

---

class myclass
{
    char str[80];
    std::ostrstream;
};

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Then initialise it in a constructor. Note that you are not deriving from ostrstream.

Quote:

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Originally Posted by laserlight

Yes. You should declare the object as a member:

Code:

---

class myclass
{
    char str[80];
    std::ostrstream;
};

---

Then initialise it in a constructor. Note that you are not deriving from ostrstream.

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How can we initialize it in the constructor?? Isn't it supposed to be initialized right when it is declared??

Quote:

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Originally Posted by juice

How can we initialize it in the constructor?

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By using the constructor's initialiser list.

Quote:

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Originally Posted by juice

Isn't it supposed to be initialized right when it is declared?

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No, because a class is a blueprint for objects of the class type.