Data types in 2_c languages (ii) binary

1.1 binary number, bit, byte and word

We are accustomed to decimal numbers: 10,12, etc.

A bit can only represent 0, or 12 states, short bit, a bit

A byte is 8 binary, called 8 bits, or byte,8 bits is a byte

A word is 2 bytes, abbreviated to Word.

Two words for double word, abbreviated DWORD

1.2 Octal

Octal system is based on the number 8, the C language 0 means octal, 0666;

1.3 Hex

The hexadecimal value 16 is the radix number system, the C language uses 0x to denote hexadecimal

Decimal	Hexadecimal	Binary
0	0	0000
1	1	0001
2	2	0010
3	3	0011
4	4	0100

Decimal conversion 8, with the decimal number as dividend, 8 as the divisor, the quotient and the remainder, until the quotient is 0, the remainder is reversed is the result of conversion

Decimal conversion 16, with the decimal number as dividend, 16 as the divisor, the quotient and the remainder, until the quotient is 0, the remainder is reversed is the result of conversion

Source: Intelligence Podcast for study only

Data types in 2_c languages (ii) binary