In C language, the conversion between hexadecimal

In C language, the conversion between hexadecimal

Conversion between hexadecimal in C LanguageAuthor: Star)

 

Integer data can be expressed in the following ways:

Decimal: these nine digits are both 0-9 and cannot start with 0.

Binary: it consists of numbers 0 and 1.

Octal: it consists of 0-7 numbers. to distinguish it from other hexadecimal numbers, it starts with 0.

Hexadecimal: consists of 0-9 and A-F. To distinguish it from other numbers, it starts with ox.

 

1. Convert decimal to binary

Method: divide the decimal number by 2, and then take the remainder until the last quotient is 0 .. Then the remainder is obtained from bottom to top (this is the binary number)

 

2. Convert binary to decimal

Method: Expand and add the binary number in decimal format by weight.

 

Analysis: Binary four-digit number, starting from a single bit: 0.1.2.3 is

The number of digits multiplied by the power of 2 to 0 + ten digits multiplied by the power of 1 of 2 +Multiply the number of hundred BITs by the power of 2 and the number of thousandsThe number multiplied by the power of 2 = The number in decimal format

 

3. Convert decimal to octal (similar to decimal to binary)

Method: divide the number in decimal format by 8 until the quotient is 0, and then return the remaining eight digits.

 

 

4. Convert octal to decimal (similar to binary to decimal)

Method: calculate the number of octal nodes by weight,The sum is the decimal number.

 

5. Binary to octal

Method 1: Binary-> Decimal-> octal

The 3rd power of method 2 is 8. Therefore, the binary can start from a single bit and be split into three into a group. If the maximum number is less than 3, the value is 0 ..

Then the number of each group represents the single digit of the octal ..

 

 

Convert binary to hexadecimalThe same way

 

5. Convert octal to binary

Method 1: 8Base-> Decimal-> binary

Method 2: Perform the division of the remainder for each bid in octal. If the remainder is not three, add 0 in the highest position. (Why are less than 3Add 0 at the highest bit? Because the power of 2 is 8).

 

 

 

The same is true for hexadecimal to binary.