R. A. Yusupov C++ Builderda masalalar va topshiriqlar samarqand 2018 yil

if (CheckBox2->Checked)

summ+=10.5;

else

summ-=10.5;

Label2->Caption=FloatToStrF(summ,ffCurrency,6,2);

}

// "kartoshka" ulagichga shichqonchani bosish

void __fastcall TForm1::CheckBox3Click(TObject *Sender)

{

if (CheckBox3->Checked)

summ+=18.5;

else

summ-=18.5;

Label2->Caption=FloatToStrF(summ,ffCurrency,6,2);

}

// "Koka-Kola" ulagichiga shichqonchani bosish

void __fastcall TForm1::CheckBox4Click(TObject *Sender)

{

if (CheckBox3->Checked)

summ+=14;

else

summ-=14;

Label2->Caption=FloatToStrF(summ,ffCurrency,6,2);

}

// OK tugmasini sichqoncha bilan bosish

void __fastcall TForm1::Button1Click(TObject *Sender)

{

if (CheckBox1->Checked && CheckBox2->Checked &&

CheckBox3->Checked && CheckBox4->Checked) {

/*

foydalanuvchi to'liq to'plamga buyurtma berib

5% chegirmaga ega bo'ldi

*/

summ*=0.95;

ShowMessage("Sizga 5% chegirma taqdim etildi.\n"

"Buyurtma summasi: " + FloatToStrF(summ, ffCurrency,

6, 2) +" so'm.");

}