public MatricePatratica(MatricePatratica A)
{
int i;
set_size(A.NrLin, A.NrCol);
for (i = 0; i < A.NrLin; ++i)
{
mat[i] = A.mat[i];
}
}
public int Determinant()
{
int det;
if (NrLin == 1)
{
return(mat[0][0]);
}
int i, j;
det = 0;
i = 0;
for (j = 0; j < NrCol; ++j)
{
///construiesc matricea care ramane
MatricePatratica aux;
aux = new MatricePatratica();
aux.set_size(NrLin - 1, NrLin - 1);
for (int i1 = 1; i1 < NrLin; ++i1)
{
for (int j1 = 0; j1 < NrLin; ++j1)
{
if (j1 < j)
{
aux[i1 - 1][j1] = mat[i1][j1];
}
if (j1 > j)
{
aux[i1 - 1][j1 - 1] = mat[i1][j1];
}
}
}
int pow;
if ((i + j) % 2 == 0)
{
pow = 1;
}
else
{
pow = -1;
}
det += pow * mat[i][j] * aux.Determinant();
}
return(det);
}
static void Main(string[] args)
{
int i, j, n;
Console.Write("Numarul de linii (si coloane) al matriei patratice: ");
n = int.Parse(Console.ReadLine());
MatricePatratica A = new MatricePatratica(n);
for (i = 0; i < n; ++i)
{
for (j = 0; j < n; ++j)
{
A[i][j] = int.Parse(Console.ReadLine());
}
}
Console.WriteLine("Determinantul este: " + A.Determinant());
Console.ReadLine();
}