Scalar product - C++ Builder

 

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

 srand(time(NULL));

}

//---------------------------------------------------------------------------

void __fastcall TForm1::Button2Click(TObject *Sender)

{

  Close();

}

//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)

{

 int i,j,k,width,height;

 width=5; height=2;

 float tab[width][height],r,d=10.0,scalar_Product;

 for(i=0;i<width;i++)

 {

for(j=0;j<height;j++)

{

k=1+rand()%100;

r=(1.00*k)/d;

tab[i][j]=r;

StringGrid1->Cells[i][j]=FloatToStrF(tab[i][j],ffGeneral,4,4);

}

 }

 std::valarray<float> x {tab[0][0],tab[0][1], tab[0][2], tab[0][3], tab[0][4]};

 std::valarray<float> y {tab[1][0],tab[1][1], tab[1][2], tab[1][3], tab[1][4]};

 scalar_Product=(x*y).sum();

 Label1->Caption="SCALAR PRODUCT = "+FloatToStr(scalar_Product);

}