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(a) >>>ÓÒÒÆ£¬¸ßλÓÃ0Ìî³ä£»
int a = 14;
int b = 2;
System.out.println(a >>> b);// 3
int c = -14;
int d = 2;
System.out.println(c >>> d);// 1073741820
(b) >>·ûºÅλ²»±ä£¬ÆäËûλÓÒÒÆ£¬¸ßλÓÃ0Ìî³ä£¬Æä½á¹ûÓëa/2bÏàͬ£»
int a = 14;
int b = 2;
System.out.println(a >> b);// 3
int c = -14;
int d = 2;
System.out.println(c >> d);// -4
System.out.println(Math.floor(a / Math.pow(2, b))); // 3.0
System.out.println(Math.floor(c / Math.pow(2, d))); // -4.0
(c) <<·ûºÅλ²»±ä£¬ÆäËûλ×óÒÆ£¬µÍλÓÃ0Ìî³ä£¬Æä½á¹ûÓëa×2bÏàͬ£»
int a = 14;
int b = 2;
System.out.println(a << b);// 56
int c = -14;
int d = 2;
System.out.println(c << d);// -56
System.out.println(Math.floor(a * Math.pow(2, b))); // 56.0
System.out.println(Math.floor(c * Math.pow(2, d))); // -56,0
(d) ¶ÔÓÚjava.util.MathÖеÄceil¼°floorº¯Êý£¬Òª×¢Òâ²ÎÊýµÄÀàÐÍ
int a = 14;
int b = 3;
System.out.println(Math.floor(a / b)); // 4
System.out.println(Math.ceil(a / b)); // 4
double c = 14d;
double d = 3d;
System.out.println(Math.floor(c / d)); // 4
System.out.println(Math.ceil(c / d)); // 5
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import java.util.Enumeration;
public class CipherTest implements Enumeration {
private int N;
private int c[], k;
private Object[] objs;
public CipherTest(Object[] items) {
N = items.length;
c = new int[N + 1];
for (int i = 0; i <= N; i++)
c[i] = i;
objs = items;
k = 1 ......
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