Negative numbers are stored in the computer

1. Negative numbers are stored in the computer in the form of complement, the highest bit 1 is negative, 0 is positive, and the complement method is convenient for addition operation.

2. BYTE type numeric range 128 to 127.

   The highest bit is the flag bit, 1272 binary is 01111111, then 127 is 10000001,-128=-127-1, so the second binary is 10000000

3. byte b=11111111; positive expression: 00000001, i.e. b=-1;

4. Positive number is reversed plus 1 for its negative representation, then negative plus 1 will get its positive form?

   Example: -3=1111 1101; after inversion: 0000 0010; Plus 1:0000 0011 = 3;

   So the negative number of the inverse plus 1 will get its positive form;

   So what does a negative minus 1 get back?

   Minus 1:1111 1100; take the inverse: 0000 0011=3, then also get its positive form

Negative numbers are stored in the computer