[es] - Napisati program u programskom jeziku c++

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Kemal Topalovic
Student, prva godina masinstva
Buzim, Bosna i Hercegovin

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Re: Napisati program u programskom jeziku c++

^{04.01.2010. u 22:52 - pre 174 meseci}

Googlo sam ga ali mi izbacuje gresku, ne znam u cemu je greska.....Ako imas vremena pogledaj...

Code:

01    // matrix inversioon
02    // the result is put in Y
03    void MatrixInversion(float **A, int order, float **Y)
04    {
05        // get the determinant of a
06        double det = 1.0/CalcDeterminant(A,order);
07
08        // memory allocation
09        float *temp = new float[(order-1)*(order-1)];
10        float **minor = new float*[order-1];
11        for(int i=0;i<order-1;i++)
12            minor[i] = temp+(i*(order-1));
13
14        for(int j=0;j<order;j++)
15        {
16            for(int i=0;i<order;i++)
17            {
18                // get the co-factor (matrix) of A(j,i)
19                GetMinor(A,minor,j,i,order);
20                Y[i][j] = det*CalcDeterminant(minor,order-1);
21                if( (i+j)%2 == 1)
22                    Y[i][j] = -Y[i][j];
23            }
24        }
25
26        // release memory
27        delete [] minor[0];
28        delete [] minor;
29    }
30
31    // calculate the cofactor of element (row,col)
32    int GetMinor(float **src, float **dest, int row, int col, int order)
33    {
34        // indicate which col and row is being copied to dest
35        int colCount=0,rowCount=0;
36
37        for(int i = 0; i < order; i++ )
38        {
39            if( i != row )
40            {
41                colCount = 0;
42                for(int j = 0; j < order; j++ )
43                {
44                    // when j is not the element
45                    if( j != col )
46                    {
47                        dest[rowCount][colCount] = src[i][j];
48                        colCount++;
49                    }
50                }
51                rowCount++;
52            }
53        }
54
55        return 1;
56    }
57
58    // Calculate the determinant recursively.
59    double CalcDeterminant( float **mat, int order)
60    {
61        // order must be >= 0
62        // stop the recursion when matrix is a single element
63        if( order == 1 )
64            return mat[0][0];
65
66        // the determinant value
67        float det = 0;
68
69        // allocate the cofactor matrix
70        float **minor;
71        minor = new float*[order-1];
72        for(int i=0;i<order-1;i++)
73            minor[i] = new float[order-1];
74
75        for(int i = 0; i < order; i++ )
76        {
77            // get minor of element (0,i)
78            GetMinor( mat, minor, 0, i , order);
79            // the recusion is here!
80            det += pow( -1.0, i ) * mat[0][i] * CalcDeterminant( minor,order-1 );
81        }
82
83        // release memory
84        for(int i=0;i<order-1;i++)
85            delete [] minor[i];
86        delete [] minor;
87
88        return det;
89    }

_{[Ovu poruku je menjao X Files dana 07.01.2010. u 18:55 GMT+1]}