1 – Laboratoriya ishi Mavzu: Dasturiy ta’minotni testlashning yashash siklini tadqiq qilish Ishdan maqsad

C++ Builderda istisnolar va xatoliklarni ushlash usullari

3 ta butun son berilgan. Shu sonlar asosida qanday uchburcha yasash mumkinligini aniqlovchi dastur tuzilsin. Dasturni testlash uchun varianlar ishlab chiqilsin. Dasturni testlalash amalga oshirilsin.

1. C++ Builderda quyidagicha forma hosil qilamiz.

2. Aniqlash tugmasida quyidagicha kod kiritiladi:

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

void __fastcall TForm1::Button1Click(TObject *Sender)

{

float a, b, c;

String s;
// urinishlar soni

soni++;

s = IntToStr(soni) + ")";
try

{

a = StrToFloat(Edit1->Text);

} // haqiqiy songa o'girishda xatolik sodir bo'lsa

catch (EConvertError &)

{

Memo1->Lines->Add(s + "A = " + Edit1->Text);

Memo1->Lines->Add("A ga qiymat xato kiritildi

qayta kiritng!");

//ShowMessage("A ga qiymat xato kiritildi qayta kiritng!");

Edit1->SetFocus();

return ;

}
try

{

b = StrToFloat(Edit2->Text);

}

catch (EConvertError &)

{

Memo1->Lines->Add(s + "B = " + Edit2->Text);

Memo1->Lines->Add("B ga qiymat xato kiritildi

qayta kiritng!");

//ShowMessage("B ga qiymat xato kiritildi qayta kiritng!");

Edit2->SetFocus();

return ;

}
try

{

c = StrToFloat(Edit3->Text);

}

catch (EConvertError &)

{

Memo1->Lines->Add(s + "C = " + Edit3->Text);

Memo1->Lines->Add("C ga qiymat xato kiritildi

qayta kiritng!");

//ShowMessage("C ga qiymat xato kiritildi qayta kiritng!");

Edit3->SetFocus();

return ;

}
if (a <= 0)

{

Memo1->Lines->Add(s + "A = " + Edit1->Text);

Memo1->Lines->Add("A ga musbat haqiqiy son kiritng!");

Edit1->SetFocus();

return ;

}
if (b <= 0)

{

Memo1->Lines->Add(s + "B = " + Edit2->Text);

Memo1->Lines->Add("B ga musbat haqiqiy son kiritng!");
Edit2->SetFocus();

return ;

}
if (c <= 0)

{

Memo1->Lines->Add(s + "C = " + Edit3->Text);

Memo1->Lines->Add("C ga musbat haqiqiy son kiritng!");
Edit3->SetFocus();

return ;

}
Memo1->Lines->Add(s + " A = " + Edit1->Text + " B = " +

Edit2->Text + " C = " + Edit3->Text);

// uchburchak tengsizligini tekshirish

if (!((a < b + c) && (b < a + c) && (c < a + b)))

{

Memo1->Lines->Add("Kiritilganlar asosida uchburchak

yasash mumkin emas");

return ;

}
// teng tanomli uchburchak ekanini tekshirish

if (a == b && b == c)

{

Memo1->Lines->Add("Teng tanomli uchburchak yasash mumkin");

return ;

}
// teng yonli uchburchak ekanini tekshirish

if (a == b || b == c || a == c)

{

Memo1->Lines->Add("Teng yonli uchburchak yasash mumkin");

return ;

}
Memo1->Lines->Add("Uchburchak yasash mumkin");

}

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

3. Testlash variantini ishlab chiqamiz va dasturni testlaymiz:

Dastur natijasi to’g’ri chiqsa bir xato bo’lsa nol ball beriladi.