The ABC YZ in the ASCII code is different from the ABC YZ in the area code, and how the computer rec

ASCLL code A corresponds to 65 and A corresponds to 97. There are corresponding tables in the book, please refer to them yourself. And you're talking about the conversion of complement and source code.

This is because in computer systems, numerical values are always stored in complements. In the C language, it is stored and calculated with complements. A 0 on the far left indicates a positive number, and a 1 on the far left indicates a negative number.

Knowing the complement of a number, there are two ways to find the original code

1) If the sign bit of the complement is "0", it means that it is a positive number, and its original code is the complement.

2) If the symbol bit of the complement is "1", which means that it is a negative number, then finding the complement of the given complement is the required original code.

To give you an example:

For example, find the complement of -15.

Step 1: +15:00001111

Step 2: Find the first 1 from right to left, and then negate all the digits on the left.

Addition formula for complement:

x+y] complement = [x]complement + y] complement.

Subtraction formula for complement:

x-y] complement = [x] complement - y] complement = [x]complement + y] complement.

I'll give you another example:

For example: 1+(-1) [decimal].

The original code of 1 00000001 is converted to complement: the original code of the 000000011 10000001 is converted to complement: 1111111100000000 is converted to decimal 0

0=0 so the operation is correct.

See for yourself and you'll understand!

The so-called area code is two bytes, the first byte is the area code, and the last byte is the bit code. The area code is the composition of the internal code such as GB2312.

For example, in the GB2312 internal code, the first digit of the area code and the bit code are all 1, and the first digit is regarded as 0 and then starts from 33. Therefore, the location code you give is not a direct corresponder to ASCII. For more information, please check the encoding format you are converting.

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ASCII (American Standard Code for Information Interchange) is a computer coding system based on the Latin alphabet for the display of modern English and other Western European languages. It is the most common standard for information exchange and is equivalent to the international standard ISO IEC 646.

The standard ASCII code character set has a total of 128 encodings. The standard ASCII code uses 7 binary bits to represent 1 character, and since the 7th power of 2 is 128, the standard ASCII code character set has a total of 128 encodings. Each encoding represents a basic symbol, i.e., up to 128 basic symbols can be represented using an ASCII code.

The standard ASCII code, also commonly known as 7-bit **, consists of a 7-bit binary code, the highest bit is 0, and its range is expressed as 00000000 01111111 in binary, and 0 127 in decimal system, a total of 128 kinds (2 to the 7th power), each encoding represents a basic symbol, that is, up to 128 basic symbols can be represented using ASCII code.

y+8=a

Therefore, the binary value of the ASCII code of A is: 1011001+1000=1100001 choose B

Option B

Z and a difference of 7, then Y and A are 8 years apart.