JAVA basic programming exercises program [32] 32 left right

 

32 program [32] left right

Title: takes an integer from 4 to 7 from the right end of a.

Program analysis: consider this:

(1) first makes a right four.

(2) is provided a low-4 are all 1, the rest is a number of 0. Available ~ (~ 0 << 4)

(3) above will be both & calculation.

 

package cskaoyan;

public class cskaoyan32 {
	@org.junit.Test
	public void logicalShift() {
		java.util.Scanner in = new java.util.Scanner(System.in);
		System.out.println("input a number:");
		int a = in.nextInt();
		int b = a >> 4;
		int c = ~(~0 << 4);
		int d = b & c;
		System.out.println(a + " " + d);

		in.close();
	}
}