Error: explicit type cast cannot convert 'void* to 'int*'

This is a discussion on Error: explicit type cast cannot convert 'void* to 'int*' within the C++ Programming forums, part of the General Programming Boards category; I'm a newbie, so please bear with: Here's my problem and the line I get an error on: int *buf ...

  1. #1
    Registered User juschillin's Avatar
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    Error: explicit type cast cannot convert 'void* to 'int*'

    I'm a newbie, so please bear with:

    Here's my problem and the line I get an error on:

    int *buf = GlobalAlloc(GPTR, sizeof(int) * count);

    when I compile the program that contains this line in C everything works fine. However when I rename my file to .cpp then I get the following error:

    error C2440: 'initializing' : cannot convert from 'void *' to 'int *'
    Conversion from 'void*' to pointer to non-'void' requires an explicit cast


    I am missing something in there I know. Something about bout c++ requires explicit casts.

    What am I missing and why do I need it?

    Any help would be great!

  2. #2
    &TH of undefined behavior Fordy's Avatar
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    C++ forces you to consider typesafety more than C

    int *buf = (int*)GlobalAlloc(GPTR, sizeof(int) * count);

  3. #3
    pronounced 'fib' FillYourBrain's Avatar
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    Code:
    int *buf = (int*)GlobalAlloc(GPTR, sizeof(int) * count);
    That should do it

  4. #4
    pronounced 'fib' FillYourBrain's Avatar
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    dang it fordy! you're fighting for that mod spot aren't you! just a half a second too late with my reply

  5. #5
    &TH of undefined behavior Fordy's Avatar
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    Quickest draw in the west

    Originally posted by FillYourBrain
    dang it fordy! you're fighting for that mod spot aren't you! just a half a second too late with my reply
    ::Blows smoke from the barrel of revolver::




  6. #6
    pronounced 'fib' FillYourBrain's Avatar
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    Why are you using GlobalAlloc with a GPTR? This has none of the benefits of HANDLE based memory allocation and it has all of the problems of being non-standard. A simple "new" would get you the same results if I'm not mistaken.

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