Continuation of the previous example (Visual C++)

#pragma endregion

System::Boolean is_First(int value)

{

int i,sum=0;

for(i=1;i<value+1;i++)

if(value%i==0)

++sum;

if(sum==2)

return true;

else

return false;

}

int *tab1, *tab2,  *tab3;

private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {

Close();

}

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {

int h_many1,h_many2,h_many3,i,j;

h_many1=h_many2=h_many3=0;

for(i=0;i<1001;i++)

if(is_First(i))

++h_many1;

for(i=1000;i<2001;i++)

if(is_First(i))

++h_many2;

for(i=2000;i<3001;i++)

if(is_First(i))

++h_many3;

label7->Text=h_many1.ToString();

label8->Text=h_many2.ToString();

label9->Text=h_many3.ToString();

tab1=new int[h_many1];

tab2=new int[h_many2];

tab3=new int[h_many3];

i=0;

j=1;

do

{

if(is_First(j))

{

tab1[i]=j;

++i;

}

++j;

}while(i<h_many1);

i=0;

j=1000;

do

{

if(is_First(j))

{

tab2[i]=j;

++i;

}

++j;

}while(i<h_many2);

i=0;

j=2000;

do

{

if(is_First(j))

{

tab3[i]=j;

++i;

}

++j;

}while(i<h_many3);

Graphics^ a1=panel1->CreateGraphics();

Graphics^ a2=panel2->CreateGraphics();

Graphics^ a3=panel3->CreateGraphics();

Pen^ p1=gcnew Pen(System::Drawing::Color::Yellow);

Pen^ p2=gcnew Pen(System::Drawing::Color::Red);

Pen^ p3=gcnew Pen(System::Drawing::Color::Green);

p1->Width=2;

p2->Width=2;

p3->Width=2;

int height=panel1->Height;

             int h1,h2,h3;

h1=h2=h3=height;

for(i=1;i<h_many1;i++)

{

a1->DrawLine(p1,tab1[i-1],h1,tab1[i],h1);

h1-=1;

}

for(i=1;i<h_many2;i++)

{

a2->DrawLine(p2,-1000+tab2[i-1],h2,-1000+tab2[i],h2);

h2-=1;

} 

for(i=1;i<h_many3;i++)

{

a3->DrawLine(p3,tab3[i-1]-2000,h3,tab3[i]-2000,h3);

h3-=1;

}

delete tab1;

delete tab2;

delete tab3;

}