binary representation of

If you use php +-*/to calculate the floating point number, you may encounter some calculation result errors, such as echo intval (0.58*100); 57 is printed instead of 58, this is actually a bug that the underlying binary of the computer cannot

Title: Please implement a function, enter an integer, output the number of binary representation of 1. For example, 9 is represented as a binary is 1001, and 2 bits is 1, so if you enter 9, the function outputs 2.1, may cause the death cycle the

PHP floating point usage and problem summary. There are many floating point number processing functions in php, including ceil, floor, round, and intval. after they are processed, they can return the expected floating point decimal places, next I

Bit operation and its application example (1)SummaryBit operations are one of the basic operations in C/s + +, and even so, it is a strange operation for most programmers-most programmers seldom use bit arithmetic. This article first briefly

The floating point number calculation problem in php recently encountered a very strange problem when I made a price program. I caught the problem. See the following code: $ A = 86.1-80.0;Echo 6.1-$;?> You will find that the echo result is not 0

I have written an article about the floating point number in PHP: you should know about the PHP floating point number (All 'bogg' aboutthefloatinPHP). However, I missed a point at the time, that is, to answer the following Frequently Asked Questions:

In "The beauty of programming" there is a section on how to find a byte of unsigned integer variable binary representation of the number of 1 , mainly refers to four methods. Here's a quick introduction:1. method of finding redundancywhen converting

There are many floating point number processing functions in php, including ceil, floor, round, and intval. after they are processed, they can return the expected floating point number decimal places. I will introduce them below. There are many

Both int and float are 4-byte, 32-bit representations. Why is the range of float greater than int?Float precision is 6~7 bit. 1.66*10^10 's numerical results are not 166 0000 0000, the larger the error.These problems are caused by the way

Document directory Float storage Parsing Floating-point Subtraction 12.0f-11.9f Calculation This article uses float as an example to explain how to store floating point numbers and How to Lose precision.First, let's take a look: float f = 12.0

Tree array for beginners ..     This is a line segment tree. We can see from the figure that C [1] = A [1]; C2 = A [1] + A [2]; c [3] = A [3]; C [4] = A [1] + A [2] + A [3] + A [4]; c [5] = A [5]; C [6] = A [5] + A [6]; C [7] = A [7]; c [8] = A [1]

As we all know, all data in a computer is represented in binary format, and floating point numbers are no exception. However, the binary representation of floating point numbers is not as simple as that of fixed points. First, clarify the concept

PHP several FAQs One, PHP floating point number of a common problem First, let's look at an example: ??? Why is the output 57? Is this a bug in PHP? A lot of people often ask such questions, in order to understand this problem, it is

I. OverviewRSA algorithm was 1977 by Ron Rivest, Adi Shamir and Leonard Adleman Trio in thesis A Method for obtaining Digital Signatures and Public-key Cryp Tosystems proposed public-key encryption algorithm. Since encryption and decryption use

Transferred from: http://zhedahht.blog.163.com/Title: Three digits A, B, c appear only once in an array, and the other numbers appear two times. Please find three numbers that appear only once.Analysis: In the blog

The past few days have been learning the tree-like array, but still smattering.Given an array, if you want to ask for all the sums in the sum, you will generally think of the accumulation, but when the array is large, the accumulation is too

1.NOT The bitwise operator is not represented by ~. The essence of the not operator is to negate the number and then subtract 1. The bitwise operator NOT is a three-step process. A. Converting an operator to a 32-digit number B.

Relive integersThere are two types of ECMAScript integers, signed integers (which allow positive and negative numbers), and unsigned integers (only positive numbers are allowed). In ECMAScript, all integer literals are signed integers by default.

A, PHP floating point accuracy loss problem Let's look at the following code: Copy Code code as follows: $f = 0.57; Echo intval ($f * 100); 56 The result may be a little surprising to you, PHP follows IEEE 754

Title: An array of three digits A, B, C appears only once, the other numbers appear two times. Please find three digits that appear only once. Analysis: In the blog http://zhedahht.blog.163.com/blog/static/2541117420071128950682/we discussed how to