C++ tilida (if, else) tarmoqlanuvchi algoritmlari ustida amallar

If / else

• if/else sintaksisi
• if <mantiqiy ifoda> <amal1> [else <amal2>];
• Misol: Agar talabning bahosi 60 dan yuqoti bo’lsa imtihondan o’tdi aks holda o’tolmadi.
• C++:
• if (grade >= 60)
• cout << “O`tdi”;
• else
• cout << “O`tmadi”;

• CONTROLLING EXECUTION - SELECTION

If / else - shart operatorining qisqa ko’rinishi

• C++ shartli operatori ternar operatori ->?:
• Sintaksis:
• o'zgaruvchi= (shart) ? shart to'g'ri bo'lsa:  shart noto`g'ri bo'lsa;
• Misol:
• grade>=60? cout << “O`tdi” : cout << “O`tmadi”;
• yoki:
• cout << (grade >=60? “O`tdi” : “O`tmadi”);

3 ta sondan kattasini topuvchi dastur

• // 3 ta kiritilgan sondan kattasini topish dasturi
• #include
•  
• int main(){
• int A, B, C, max;
•  
• cout << “3 ta ixtiyoriy sonni kiriting!\n";
• cin >> A >> B >> C;
• if (A > B)
• max = A;
• else
• max = B;
• if (C > max)
• max = C;
• cout << “Sonlarning kattasi: " << max << endl;
• return 0;
• }

• if (Mantiqiy_ifoda)
• else

• if (Mantiqiy_ifoda)
• Blok 1_ 1
• else
• Blok 1_ 2

• Blok2

• Blok 1

• Ichma-ich shart operatorlari

Ichma ich joylashgan if

• // Ushbu dastur test ballini 5 ballik bahoga aylantiradi.
• #include
• int main(){
• int t;
• cout << “Test balingizni kiriting!: "; cin >> t;
• if (t > 100) cout << “Xatolik! Ball xato kritilgan!" ;
• else if (t >= 90) cout << ‘5';
• else if (t >= 80) cout << ‘4';
• else if (t >= 70) cout << ‘3';
• else if (t >= 60) cout << ‘2';
• else cout <<“Siz imtihondan o`ta olmadingiz!";
• return 0;
• }

C++ Switch (Tanlash Operatori)

• Sintaksisi:
• switch(qiymat) {
• case x: // code block break;
• case y: // code block break;
• default: // code block }
• Bu quyidagicha ishlaydi:
• switchIfoda bir marta baholanadi
• Ifodaning qiymati har birining qiymatlari bilan taqqoslanadi case
• Agar mos keladigan bo'lsa, tegishli kod bloki bajariladi
• break tanlash operatorini ishini yakunlaydi
• defaultkalit so'zlar ixtiyoriy bo'lgan qiymat uchun ishlaydi. yuqoridagi birontasi mos kelmasi demak default ishlaydi

• .

• CONTROLLING EXECUTION - SELECTION

Switch

• Ushbu dastur test ballini harf bahosiga aylantiradi.
• #include
• Using namespace std;
• int main(){
• int score;
• cout << "Enter the test score: ";
• cin >> score;
• switch (score/10) {
• case 10:
• case 9: cout << 'A' << endl; break;
• case 8: cout << 'B' << endl; break;
• case 7: cout << 'C' << endl; break;
• case 6: cout << 'D' << endl; break;
• case 5:
• case 4:
• case 3:
• case 2:
• case 1:
• case 0: cout << 'F' << endl; break;
• default: cout << "Error: score is out of range.\n";
• }
• return 0; }