strrchr

This is a discussion on strrchr within the C++ Programming forums, part of the General Programming Boards category; Hi everyone, Does anyone know why the old C function "strrchr" has been implemented in C++ as Code: const char ...

  1. #1
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    strrchr

    Hi everyone,

    Does anyone know why the old C function "strrchr" has been implemented in C++ as

    Code:
    const char * strrchr ( const char * str, int character );
          char * strrchr (       char * str, int character );
    and not as

    Code:
    char * strrchr ( const char *, int );
    Some old C libraries won't compile anylonger...

    Thanks!

  2. #2
    C++ Witch laserlight's Avatar
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    strrchr returns a pointer to the character found (or a null pointer otherwise). As such, it makes sense that if you pass it a pointer to something that should not be changed, you get back a pointer to something that should not be changed.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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