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    Devshed Newbie (0 - 499 posts)

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    Question Can c++ strings be used as char buf[]?

    I'm playing around with some sockets and most of the c based commands utilise char buf[BUFSIZE]. I've been using c++ strings and sending &string[0] whenever a char * is required. I'm aware that a buf can be a string or not depending on wether is is null terminated but is it a bad idea to force a c++ string object into a char buf[]?

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    Devshed Novice (500 - 999 posts)

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    why dont u just convert it out of the C++ string to a C string?

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    Devshed Supreme Being (6500+ posts)

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    It is a bad idea only if the function alters the char buffer. This is because, the string object may keep the size of the string allocated in a different member of the class (depending on the implementation of course), and if the function alters the char buffer, interesting things might occur later on. If the function accepts a const char* instead of a char *, then at least you have some assurance that the function is not going to alter the contents. BTW string objects have a c_str() member function which returns the pointer to the char array of the object.
    Last edited by Scorpions4ever; March 15th, 2003 at 07:15 PM.

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