Clear little database

This is a discussion on Clear little database within the C++ Programming forums, part of the General Programming Boards category; Hi. I was wondering if there is another way or better way to clear my database, I had this but ...

  1. #1
    Banned Yuri's Avatar
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    Clear little database

    Hi.
    I was wondering if there is another way or better way to clear my database, I had this but I would like another way, to learn from.

    PHP Code:
    for ( int i 01024i++ )
    {

        
    string Database ] = '\0';

    Why I am making such big deal is because I am still learning and I saw something like Array [ 0 ] = { 0 }; or something simular, what does that do? Could that be usefull?
    Thanks, Yuri.
    Last edited by Yuri; 02-12-2006 at 08:09 AM.

  2. #2
    Registered User
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    if Database is an array of POD (plain-old-data) types, such as char* then you can use memset
    Code:
    memset(Database,0,1024);

  3. #3
    Banned Yuri's Avatar
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    Sorry, I edited my thread, it's a C++ string.

  4. #4
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    Code:
    Database.clear();

  5. #5
    Guest Sebastiani's Avatar
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    you can use generic template functions like these that work on any datatype that can be (safely) constructed without arguments:

    Code:
    template <class T>
    inline
    void
    init(T & value)
    {
    	value = T();
    }
    
    template <class I>
    void
    init(I begin, I end)
    {
    	while(begin != end)
    	{
    		init(*begin++);
    	}
    }
    
    template <class I>
    void
    init(I begin, unsigned n)
    {
    	while(n)
    	{
    		init(*begin++);
    		n--;
    	}
    }
    you could even optimize it further for POD's using some sort of template specialization scheme.
    Code:
    #include <cmath>
    #include <complex>
    bool euler_flip(bool value)
    {
        return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) 
            * std::complex<float>(std::atan(1.0)
            *(1 << (value + 2)))
        ).real() < 0;
    }

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