Takrorlanuvchi jarayonlar va ularni dasturlash
![Agar dastur bajarilish jarayonida operator yoki operatorlar guruhi bir necha marta
qayta-qayta bajarilsa , bunday jarayonlarni takrorlanuvchi (siklik) jarayon deyiladi.
C++ tilida siklni 3 xil ko’rinishda tashkil qilish mumkin.
1.Sharti avval tekshiriladigan takrorlanish (oldshartli sikl):
while (shart) operator (lar);
Bu yerda operatorlar while da ko’rsatilgan shart yolg’on bo’lgunicha takrorlanadi.
Takrorlanish tanasi murakkab bo’lsa, ya’ni 1 tadan ortiq operatorlar qatnashsa,
ularni alohida {} ichiga olish kerak bo’ladi.
Masalan: b = 2*(a+5); a € [1, 10]; h=1;
# include <iostream>
void main ( )
{ int a=1, b;
while (a<=10)
{ b = 2*(a+5); cout << “b=” <<="" p="">
cout << “a=” <
a++ ; }
}
Ekranda 10 ta a va b larning qiymatlari paydo bo’ladi.
2- misol.](https://docx.uz/documents/7bf3b5ff-88c4-4de6-b066-d678fa4d921a/page_10.png?v=1)
![# include
void main ( )
{ int i = 10;
while ( i++ < =15)
cout << “Salom!!!”<< endl; }
Ekranda 5 marta “Salom!!!” yozuvi paydo bo’ladi.
2. Sharti keyin tekshiriladigan takrorlanish (so’ngshartli sikl):
do
operator (lar)
while (shart);
Takrorlanish while da ko’rsatilgan shart yolg’on bo’lgunicha davom etadi.
Masalan: y=sinx; x € [1,2] ; h=0.1
#include<iostream>
#include<iomanip>
void main ( )
{ float x=1, y;
do](https://docx.uz/documents/7bf3b5ff-88c4-4de6-b066-d678fa4d921a/page_11.png?v=1)
![1-misol. Y = cos x; x € [2,3] ; h=0,2;
# include
# include
void main ( )
{ float x, y;
for (x=2; x<=3; x+ = 0.2)
{ y=cos(x); cout << “x=”<< x << “ y=”<< y << endl; }
}
2-misol. 100 gacha bo’lgan juft sonlarni ekranga chiqarish dasturi.
# include<iostream>
void main ( )
{ int i = 2;
while (i<=100)
{ cout << “i=”<< i; i += 2; } }
….
for (int i=2; i<=100; i +=2)
cout << “i=”<< i; do
cout << “i=”<< i; i += 2;
while (i<=100);](https://docx.uz/documents/7bf3b5ff-88c4-4de6-b066-d678fa4d921a/page_13.png?v=1)
![for (x=1; x<=100; x++)
for (y=1; y<=100; y++)
if (19*x + 5*y = = 100)
{ z = 100 – x – y;
cout << “x=”<<="" p="">
cout << “y=”<<y;< p=""></y;<>
cout << “z=”<<="" p="">
return 0;
} for (x=1; x<=100; x++)
for (y=1; y<=100; y++)
for (z=1; z<=100; z++)
if (x + y + z = = 100)
{ cout << “x=”<<="" p="">
cout << “y=”<<y;< p=""></y;<>
cout << “z=”<<="" p="">
return 0;
}
2.2 Continue operatori
Bu operator yordamida sikl parametrining biror qiymatida hisoblashni to’xtatib,
keyingi qiymatida hisoblashni davom ettirish mumkin. Masalan: y = 2x
funksiyasini x € [1,18] oraliqda h=1 qiymat bilan hisoblash kerak, lekin x=6 yoki
x=13 qiymatlarida hisoblashni bajarmaslik kerak.
# include <iostream>
void main ( )
{ int x, y;
for (x=1; x<=18; x++)
{ if (( x = = 6) || (x = = 13)) continue ;
y = 2*x; cout << “x=”<< x << “ y=” << y << endl;](https://docx.uz/documents/7bf3b5ff-88c4-4de6-b066-d678fa4d921a/page_15.png?v=1)
Takrorlanuvchi jarayonlar va ularni dasturlash