reading a bool

This is a discussion on reading a bool within the C++ Programming forums, part of the General Programming Boards category; I can save a bool value but I get an error when I try to read it -> bool dead; ...

  1. #1
    Frustrated Programmer :( phantom's Avatar
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    reading a bool

    I can save a bool value but I get an error when I try to read it ->

    bool dead;

    save<<player.dead<<endl; //saves it as 0, this works fine

    save>>player.dead; //Gets the following error - binary '>>' : no operator defined which takes a right-hand operand of type 'bool' (or there is no acceptable conversion
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  2. #2
    Has a Masters in B.S.
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    Read it in as a char and convert it to bool, it should work the same since a bool is still a byte.
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  3. #3
    Registered User
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    One option is to open the stream for input and output.

    Code:
    #include <fstream>
    using namespace std;
    
    struct player_type
    {
       bool dead;
    };
    
    int main()
    {
       bool dead;
    
       player_type player;
       player.dead = true;
       //player.dead = false;
    
       fstream save("game.txt",ios::in | ios::out);
       save<<player.dead<<endl; //saves it as 0, this works fine 
       save>>player.dead; //Gets the following error - binary '>>' : no operator defined which takes a right-hand operand 
    
       cout << "player.dead:" << player.dead << endl;
       if (player.dead)
          cout << "dead\n";
       else
          cout << "alive\n";
       return 0;
    }
    Last edited by swoopy; 10-05-2001 at 11:50 PM.

  4. #4
    Frustrated Programmer :( phantom's Avatar
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    thanks no-one, I'll do it that way. I will admit onething to you no-one, that was a brilliant creative thought to get your name, it deflates the ego when you get an e-mail that reads -> 'no-one has just replied to your thread'

    fstream save("game.txt",ios::in | ios: ut); // dont you hate it when the face comes up in the code?

    Cheers for the reply swoopy. The code I gave assumed that I had the streams open for input and output. I was able to output the bool (it is either 0 or 1) but I couldn't read it in as a bool
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