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Source Code to find Inverse of N X N matrix in C or in C++

Posted on 2006-11-06
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Last Modified: 2012-06-22
Hi Experts

I would like to have source code to find Inverse of N X N matrix
either in C or in C++

Any algorithm can be used Crout's, Gaus' or finding co-factor

Regards
Shiju S N
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Question by:Shiju Sasidharan
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8 Comments
 
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Accepted Solution

by:
sunnycoder earned 400 total points
ID: 17880038
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Author Comment

by:Shiju Sasidharan
ID: 17880192
@ sunnycoder
Thank you for the code.

I am also hoping for a C++ stuff with operator overloaded.
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Expert Comment

by:sunnycoder
ID: 17880199
>I am also hoping for a C++ stuff with operator overloaded.

Homework ?
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LVL 14

Author Comment

by:Shiju Sasidharan
ID: 17880225
sorry, i am not asking for home work job.
If any one has got link or source code then pls provide
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LVL 45

Expert Comment

by:sunnycoder
ID: 17880239
Sounds very strange that you impose a restriction like C++ with operator overloading, unless the specific requirement of an assignment is to use operator overloading ... else, any code that does the job should suffice.
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Author Comment

by:Shiju Sasidharan
ID: 17880386
>>impose a restriction
Please appologise if my comment gave such an impression
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Assisted Solution

by:itsmeandnobodyelse
itsmeandnobodyelse earned 100 total points
ID: 17883721
>>>>  I am also hoping for a C++ stuff with operator overloaded

Suppose, you think of overloading unary operator~.

Take the sample sunnycoder gave you a link to.

Make the three functions

   
    double Determinant(double **a,int n)

    void CoFactor(double **a,int n,double **b)

    void Transpose(double **a,int n)


member functions of a class Matrix. 'a' and 'n' were data members of the class while 'b' needs to be passed as 'Matrx& b'. Determinant, CoFactor and Transpose have no arguments then. The rest of the implementation code should compile with minor changes (e. g. replace malloc/free by new/delete).

Then

    Matrix& Matrix::operator~()
    {
            Matrix b = *this;  // make a copy

            CoFactor();
            Transpose( );

            (*this) /= b.Determinant();
            return *this;
    }

Beside of the three functions you would a copy constructor/assignment operator and a operator/= where the prototype is

   Matrix& Matrix::operator/=(double d);

Regards, Alex

   

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Author Comment

by:Shiju Sasidharan
ID: 17886589
Thank you friends
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