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Thread: Value of a variable when it is not reserved

  1. 04-25-2011 #1
    linuxlover
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    Value of a variable when it is not reserved

    What is the value of a variable when it is delared
    ie.
    int x ;
    This declaration allocates 2 bytes of memory (not in linux) and we can refer to that memory as a.will it erases the data at that location and initialises a to 0..also what happens when an uninitialised variable is passed to a function..
  2. 04-25-2011 #2
    laserlight
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    If x has static storage duration (it is not declared static, but it could be a global variable), then it will be zero initialised. If x has automatic storage duration (e.g., it is a local variable), then its initial value is indetermine (or "garbage").
    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
  3. 04-25-2011 #3
    linuxlover
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    thanks for that...I forgot basic things like storage classes...thanks a lot
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