Convert a variable's datatype

This is a discussion on Convert a variable's datatype within the C Programming forums, part of the General Programming Boards category; Hello all, Is it possible to convert a single variable's datatype several times in code? If so, is it frowned ...

  1. #1
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    Question Convert a variable's datatype

    Hello all,

    Is it possible to convert a single variable's datatype several times in code? If so, is it frowned upon? It saves space though so you don't have to use new variables.

    Here is an example:
    Code:
    float i;                //i is float here
    i=456.79835;
    i=(int)i;              //i changes to integer here
    Thanks!

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    You say "i changes to integer here", but it doesn't. i is still a float variable, and will always and forever be a float variable. You can put an integer value in it, but that doesn't change the type of the variable just as
    Code:
    float i = 1; //i is still a float variable, even though 1 is an int

  3. #3
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    Ah, ok so I do need to make another variable specifically for the datatype...

    Thanks.

  4. #4
    C++ Witch laserlight's Avatar
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    Yes, if you need the variable to have a different type, just create a new variable of that type.
    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.
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