10 to 2 and 16, 10 to 16
// When I see the Forum saying that I encountered an interview, I tried to write public class Test {public static void main (String [] args) {System. out. println (toBinary (9); System. out. println (toHex (559); System. out. println (Integer. toBinaryString (9); System. out. println (Integer. toHexString (559);/* 100122F100122f */} publi
#include The hexadecimal string is converted to kanji (GBK) and the character (ASC) strcpy (HS, "61BABA"); i=0; while (1) {if (1!=sscanf (hs+i*2, "%2x", v)) is break; s[i]= (char) v; i++; } s[i]=0; printf ("hs=%s,s=%s\n", hs,s); return 0;} i=1024,bs=00000000000000000000010000000000//i=1024,hs=00000400//hs=00000400,i=1024//bs= 00000000000000000000010000000000,hs=00000400//bs=00000000000000000000010000000000,i=1024//hs=00000400
Use an expression to determine whether a number X is 2 ^ N (2, 4, 8, 16 ,...), Unavailable loop statement
Answer :! (X (X-1 ))
Analysis: The numbers 2 ^ N (100, 1000) are converted to binary Values 10, 10000, and.
If the result of X-1 and X is 0, x is 2 ^ n.
Extension:R
Unicode, ucs-2, ucs-4, UTF-16, utf-32, UTF-8
Unicode details
Copyright Notice: It can be reproduced at will, but the original author charlee and original link http://tech.idv2.com/2008/02/21/unicode-intro/must be indicated in a timely manner.
Maybe everyone has heard of Unicode, UCS-2, UTF-8 and other words, but what they specifically mean, what is the principle
About 16-bit OS attempts (2)
At the end of the last article, I posted a large part of my boot loader, which may be confusing. here I wrote another boot loader in the 16-bit real-time mode of the tiny version. Let's take a look.Here I will explain again that this article only records my own 16-bit OS experience and is n
Binary conversion has always been a headache for beginners, the following is a simple list of how each of the binary is converted.# print (' 2-->8: ', Oct (int (' 0b1010 ', 2)) # 2-10-8# print (' 2-->10: ', int (' 0b1010 ', 2)) #
Today, when it comes to the question of string conversion to int, the conversion problem of signed number, we find that we need to look back into the problem of the system. Find some information, think can also, borrow a paragraph here and prepare to check.16 binary: Use 16 as the base counting system. 10 to 15 are represented by the number 0-9 and the letter a-f (or its uppercase a-f).Hexadecimal number co
the use of this parameter situation;(2), there is an Isa pointer inside the block, indicating that it is also an object. And when constructing this block, the pointer is pointed to the _nsconcretestackblock, which will be explained in detail below;(3), block callback function, essentially through the call function implementation.15, through 13 of the simple block example to understand the block's 3 main function points of the callback function of the
Common ratios
At the beginning of the information age of 195x, the most notable feature is that analog technology has turned to digital technology, graphic design has been gradually led by electronic devices from paper to media, and the granularity units have changed, but this is not so much for designers, the problem is the ratio.
Aspect ratio, which is the height ratio, only discusses the three most common categories: photography, video, and display equipment.
The common rates of photograph
//decimal Transfer to othervarx=110; alert (x); Alert (x.tostring (8)); Alert (x.tostring (32)); Alert (x.tostring (16)); //Other Turn decimalvarx= ' 110 '; Alert (parseint (x,2)); Alert (parseint (x,8)); Alert (parseint (x,16)); //other transfer to other//use parseint to convert to decimal before using ToString to go to target systemAlert (String.fromCharCode (
Two of these methods can be used to easily convert various hexadecimal values:Convert. ToInt32 (string value, int fromBase ):You can convert strings of different hexadecimal values to numbers. The fromBase parameter is in the hexadecimal format and can only be 2, 8, 10, or 16:For example, the result of Convert. ToInt32 ("0010", 2) execution is
Transformations in the. NET framework, the System.Convert class provides a more comprehensive range of conversions between types and values. Two of these methods allow you to easily implement conversions between the various values of the system:
Convert.ToInt32 (string value, int frombase):
You can convert a string of different values into numbers, where the frombase parameter is in the form of 2, 8, 10, and 1
Two of these methods allow you to easily implement conversions between the various values of the system:
Convert.ToInt32 (string value, int frombase):
You can convert a string of different values into numbers, where the frombase parameter is in the form of 2, 8, 10, and 16:
If Convert.ToInt32 ("0010", 2) The result of execution is
C ++ Primer learning note _ 16 _ class and data abstraction (2) _ implicit this pointer, primer_16
C ++ Primer learning note _ 16 _ class and data abstraction (2) _ implicit this pointer
1. Introduction
As mentioned above, a member function has an additional implicit parameter, that is, a pointer to the class object.
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