arrays

This is a discussion on arrays within the C++ Programming forums, part of the General Programming Boards category; Originally Posted by john5754 Here is what I got, It seems to work when I run it. See any problems? ...

  1. #16
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by john5754
    Here is what I got, It seems to work when I run it. See any problems?
    It should not even compile without errors since this statement is not terminated by a semi-colon:
    Code:
    int jimmy[Height * Width]
    I suggest that you post your actual code (copy and paste, if necessary), and please post it in [code][/code] bbcode tags.

    EDIT:
    Incidentally, I think that you need two arrays: the two dimensional array source and the one dimensional array destination. Alternatively, you use a one dimensional array and access it as a two dimensional array (but that seems the opposite of what you are asking for). Or, you use a two dimensional array and access it as a one dimensional array via a cast (but in practice, this should be avoided).
    Last edited by laserlight; 12-01-2008 at 10:14 AM.
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  2. #17
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    Code:
    #include <iostream>
    #include <iomanip>
    using namespace std;
    
    
    
    int main()
    {
    	const int j=99;
    	int height=3,width=5,n,m,i,jimmy[j];
    
    	for(n=0; n<height; n++)
    		for(m=0; m<width; m++)
    		
    		{jimmy [n]=(n+1)*(m+1);
    		cout<< setw(4)<< jimmy[n];
    	}
    
    	return 0;
    }

  3. #18
    Guest Sebastiani's Avatar
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    I really don't get what you're trying to accomplish here. The code you've posted does nothing but assign some random values to the first three elements in a one-dimensional array. If you want to transform a 2-d array to 1-d, just do a cast. If you want to copy it then do the cast and use memcpy (height * width * sizeof( int )). Or, if you insist on doing it the hard way, source[ n ][ m ] == destination[ width * n + m ].
    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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