global variables

This is a discussion on global variables within the C++ Programming forums, part of the General Programming Boards category; hi, i have a question about global variables.for example(sorry i just made up its not a good example,the purpose me ...

  1. #1
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    global variables

    hi,

    i have a question about global variables.for example(sorry i just made up its not a good example,the purpose me to understand how it works).i define a global variable its called age;

    1-if i use the age again somewhere else(in a function or in the main body).what the age`s value ?i mean will the program hold its first value(20)?or the value after process ?i mean do the global variables always contain their first value?



    Code:
    #include<iostream>
    
    int age=20;
    
    int main()
    {
    
    age=age+2;
    
    return 0;
    
    }

    thanks.

  2. #2
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    the age in main body refers to the global variable age, after the statement age = age + 2; the value after process is 22. If you still use age in somewhere else after process, the value is still 22.
    Nana C++ Library is a GUI framework that designed to be C++ style, cross-platform and easy-to-use.

  3. #3
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    thanks.

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