Invert a matrix!!!

[TimYee]

Hi,

I got stuck while trying to invert a matrix.

#include <iostream>
#include <ql/quantlib.hpp>

using namespace std;
using namespace QuantLib;

int main()
{
  Matrix M(3,3,0);
  int n=M.rows();

  for(int i=0;i<n;i++)
    for(int j=0;j<n;j++)
      if(i==j) M[i][j]=2;

  Matrix N = inverse(M);

  cout<<N;

return 0;
}

I thought inverse should be a function which should return a inverted matrix after giving a matrix to it. To play safe, I include <ql/quantlib.hpp>, but the compiler still says 'inverse' was not declared in the scope as below.

try.cpp:22: error: ‘inverse’ was not declared in this scope

Anybody could help me with this would be highly appreciated!!!

Tim

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