about objects

This is a discussion on about objects within the C++ Programming forums, part of the General Programming Boards category; hi i have many object and i overloaded operator + in my class i want let user to choose objects. ...

  1. #1
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    about objects

    hi
    i have many object and i overloaded operator + in my class
    i want let user to choose objects.
    so i get the name of subjects from user
    now how can run function +
    (for example user enter A and B how can i run (A+B )

  2. #2
    C++ Witch laserlight's Avatar
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    If you want to refer to the variables by name based on user input, perhaps you could use a std::map.
    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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    Quote Originally Posted by laserlight View Post
    If you want to refer to the variables by name based on user input, perhaps you could use a std::map.
    thank you but is there another way

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    C++ Witch laserlight's Avatar
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    Quote Originally Posted by aminpost
    thank you but is there another way
    Maybe, but why do you reject the approach that I have suggested?
    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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    Quote Originally Posted by laserlight View Post
    Maybe, but why do you reject the approach that I have suggested?
    because i should work with array for example arrays that stores object name
    but i do not know how

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    C++ Witch laserlight's Avatar
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    Quote Originally Posted by aminpost
    because i should work with array for example arrays that stores object name
    What made you come to the conclusion that you should use an array of objects that know their own name (or rather, are assigned names by which they can be referenced)? It is certainly possible, but you would need to keep the array in sorted order by "object name" in order to use binary search. A std::map or std::tr1::unordered_map is likely to be easier.
    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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