22-bob: Bit bilan manipulyatsiya

DASTURLASH MARUZA FANIDAN TAYYORLANGAN TAQDIMOT

GURUH:651 22

TALABA:IKROMOV OYBEK

22.1-bo'lim: Tekshirish, sozlash, tozalash va almashtirish

individual bitlar. Bitta uzunlikdagi niqobdan foydalanish

Agar biz butun sonning n bitini o'zgartirmoqchi bo'lsak, i (bayt, qisqa, char, int yoki uzun):‌‌

(i & 1 << n) != 0 // checks bit 'n’

i |= 1 << n; // sets bit 'n’ to 1

i &= ~(1 << n); // sets bit ‘n’ to 0

i ^ = 1 << n; // toggles the value of bit 'n'

22-bob: Bit bilan manipulyatsiya

Long/int/short/baytni bit niqobi sifatida ishlatish:‌‌

• Long/int/short/baytni bit niqobi sifatida ishlatish:‌‌
• public class BitMaskExample {
• private static final long FIRST_BIT = 1L << 0;
• private static final long SECOND_BIT = 1L << 1;
• private static final long THIRD_BIT = 1L << 2;
• private static final long FOURTH_BIT = 1L << 3;
• private static final long FIFTH_BIT = 1L << 4;
• private static final long BIT_55 = 1L << 54;
• public static void main(String[] args) {
• checkBitMask(FIRST_BIT | THIRD_BIT | FIFTH_BIT | BIT_55);
• }

private static void checkBitMask(long bitmask) {

• private static void checkBitMask(long bitmask) {

System.out.println("FIRST_BIT: " + ((bitmask & FIRST_BIT) != 0));

System.out.println("SECOND_BIT: " + ((bitmask & SECOND_BIT) != 0));

System.out.println("THIRD_BIT: " + ((bitmask & THIRD_BIT) != 0));

System.out.println("FOURTh_BIT: " + ((bitmask & FOURTH_BIT) != 0));

System.out.println("FIFTH_BIT: " + ((bitmask & FIFTH_BIT) != 0));

System.out.println("BIT_55: " + ((bitmask & BIT_55) != 0));

}

}

Chop etish

FIRST_BIT: rost

SECOND_BIT: noto’g’ri

THIRD_BIT: rost

FOURTh_BIT: noto’g’ri

FIFTH_BIT: rost

BIT_55: rost

• biz checkBitMask parametri sifatida qabul qilgan niqobga mos keladi:‌‌FIRST_BIT | THIRD_BIT | FIFTH_BIT | BIT_55.