Tag：Octal number system
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Time：2021-9-2
Always forget the Java string format specifier? Or maybe you never took the time to learn. This is a reference to the various signs you can use.Do you try to read and understand Java’s string format documents? I’ve found it almost impenetrable. Although it does contain all the information, the organization still has some shortcomings. […]
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Time：2021-6-9
The usage of input output conversion specifier in C language This paper mainly introduces the usage of conversion specification in formatted input and output statements in C language printf sprintf fprintfConversion specifier for % [flags][width][.precision][length]specifier flags meaning – Align left + When the signed value is positive, a positive sign is added before the value; […]
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Time：2021-6-8
The numbers we use in our life are all decimal, and binary is the most direct language that the machine can recognize. But binary is too big to record. So binary is usually converted to octal or hexadecimal. In our daily life, the number (decimal system) is between 0 ~ 9. Similarly, the range of […]
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Time：2021-4-30
1、 Fundamentals of C language 1. Learning methods See more + knock more + think more 2. History of C language Machine code: 01 binary to write code, very difficult 10 + 11 operation + —》 01001Assembly language: replacing sequences in machine code with mnemonics + —》addB language1972: Design UNIX system and invented C language […]
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Time：2021-4-1
Why use output controllers: We know that in the computer, data is stored in the form of binary in the computer, but the code composed of 01 can represent both data and instructions. It’s easy to misunderstand if we don’t use the output controller to become what we want. If the code composed of 01 […]
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Time：2021-1-19
fn main() { Println! (“{}”, 1); // default usage, print display Println! (“{: O}”, 9); // octal Println! (“{: X}”, 255); // hexadecimal lowercase Println! (“{: X}”, 255); // hexadecimal uppercase Println! (“{: P}”, & 0); // pointer Println! (“{: B}”, 15); // binary Println! (“{: e}”, 10000f32); // scientific count (lowercase) Println! (“{: e}”, […]
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Time：2020-12-11
Note: This paper is transferred fromPick up the star blog Regular expressions in PHP “^ D + $” // non negative integer (positive integer + 0) “^ [0-9] * [1-9] [0-9] * $” // positive integer “^ ((- \ D +)| (0 +)) $” // non positive integer (negative integer + 0) “^ – [0-9] […]
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Time：2020-11-25
OCT function is also a python built-in function. It mainly converts an integer into octal, which is similar to ord function / Chr function; 1、 Introduction to OCT function The oct() function converts an integer into an octet string. The syntax is as follows: oct(x) Parameters: X – integer; Return value: return octal […]
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Time：2020-8-10
1、 System 1. Display octal and hexadecimal (1) % d is used to display decimal numbers; (2) % O is used to display octal numbers; (3) % X is used to display hexadecimal numbers. (4) % u is used to display an integer of type unsigned. In addition, if you want to display prefixes 0, […]
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Time：2020-8-7
Ask questions PHP nativejson_encodeMethods when encoding Chinese, no parameters are addedJSON_UNESCAPED_UNICODEGet a list of classes\uXXXXThe string with parameters is the Chinese we usually see. What happened? Confirmation phenomenon //1.php <?php echo json_ Encode (‘good ‘); # php 1.php > 1.txt # ls -l 1.txt -rw-r–r– 1 root root 8 Jun 12 15:21 1.txt # cat […]
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Time：2020-7-22
The numbers we usually use are composed of 10 numbers from 0 to 9, such as 1, 9, 10, 297, 952, etc. a number can represent nine at most. If you want to represent 10, 11, 29, 100, etc., you need to combine multiple numbers. For example, for the result of 5 + 8, if […]
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Time：2020-7-16
I. char type Instead, char.65 represents an integer of type A, not an ASCII character; 2. The standard ascii range is 0-127; a global character set is created by commercial Unicode; 3. Note: C language defines 1 byte as the bit occupied by char type, so char type can be used in 16 bit, 32-bit […]
