C-language in the system

In-process

A way of counting. The focus is on how many times a count is in.

1) C language can be recognized in the system

1. Binary

Every bit. 0 0 1 0 0 1 1 0 1 0 1 0 0 1 0 1 1 0

In the C language, the way to write a binary number is preceded by a 0b or 0B prefix, binary each bit is 0 or 1, every 2 into 1;

2. Eight binary

Every bit. 0 1 2 3 4 5 6 7 10 11

In the C language, the way to write an octal number is to prefix it with a 0 in front, and every 8 into 1;

%o Outputs data in integer variables in eight-binary form

3. Decimal

Every bit. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

In C language directly write 1 integers, then the default is the decimal, every 10 into 1;

%d outputs data in integer variables in decimal form

4.16 Binary

Every bit. 0 1 2 3 4 5 6 7 8 9 a B c D E F 10 11 12

In C, the way to write a hexadecimal number is preceded by a 0x or 0X prefix, every 16 into 1;

%x outputs data in integer variables in eight-binary form

2). Conversion between the binary a. Basic concepts

Digital: Refers to the number of each digit of this data.

Digits: The position of the numeral in this number. From right to left. Increments from 0.

Cardinality: That is, how many data can be represented by each number of digits.

(cardinality actually refers to the binary of this number).

Bit right: Digital times (cardinality of the number of bits)

Any number of the 0-time parties are 1.

B. Decimal conversion into binary

In addition to the 2 method of taking the remainder. Divide this number by 2. Until the quotient is 1 or 0. Then the last 1 quotient and all remainder are reversed. This is the binary that corresponds to the decimal.

Cases:

The binary of 10 is 1010

The binary of 178 is 10110010

C. binary conversion to decimal

Weighted method: Add this binary number of each digital bit right, is the binary corresponding to the decimal.

10101 each of the 1 digital weights added.

No. 0 Bit right: 1 * 2 of 0 Parties 1

1 * 0

2 * 4

3 * 0

4 * 16

D. Decimal conversion to octal

Except 8 (similar to Decimal to binary method)

E. Eight binary to decimal

Weighted method: The corresponding decimal number is the sum of each 1 digits of octal.

0342

No. 0 Bit: 2 * 8 of 0 Parties 2

1 4 * 8 of 1 32

2 3 * 8 of 2 192

F. binary conversion to octal.

Three-in-one rule: divide this binary from low to high to 1 groups per three. High enough to fill 0 will convert every 1 group to decimal. Finally, the decimal of each 1 group is connected. is the octal corresponding to this binary.

001 011 100) 110 011

1 3 4) 6 3

G. Convert eight binary to binary.

Split three: This octal number of No 1 digital split into 1 three-bit binary number. Connect these binary numbers together.

134674

001 011 100 110 111 100

H. Binary conversion to hexadecimal.

Si He rule: divide this binary from low to high to 1 groups per four bits. High enough to fill 0

Converts each 1 group to the corresponding hexadecimal. Finally, the hexadecimal number of each of the 1 groups converted successfully is linked together.

11100101010111110111101010101

0001 1100 1010 1011 1110 1111 0101 0101

1 c A B E F 5 5

K. 16 binary conversion to binary.

Split the four rules: the hexadecimal Book of every 1 digital split into 1 four-bit binary number, to connect it together.

4dea761;

0100 1101 1110 1010 0111 0110 0001

C-language in the system