how to define pi

 Rectangular nesting time limit: 3000 MS | memory limit: 65535 KB difficulty: 4 Description There are n rectangles. Each rectangle can be described by a and B to indicate length and width. Rectangle X (a, B) can be nested in Rectangle Y

[OpenGL] Shader instance analysis (7)-Snowflake falling effect, shader instance analysis Keep forwarding address: http://blog.csdn.net/stalendp/article/details/40624603 After studying the effect of falling snow, I feel very good. I will share it

is an important library in the C function library. I collect some frequently-used libraries and attach examples or descriptions to some obscure functions. Here, I divide into six categories:Triangle function library;Anti-triangle function

/* Use the conversion specifier */# Include # Include # Define PI 3.141593 // The first method to create a symbolic constant# Define pages 93179962# Define blurb "authentic imtation! "# Define words 65618# Define pages2 336Int main (void){Printf ("\

  Source: hdoj 1700   Mathematical Proof] If R is the circle radius, A, B, and C are the angles of triangles, A/Sina = B/sinb = C/sinc = 2R is obtained from the sine theorem.Therefore, A + B + C = 2R (SINA + sinb + sinc). When r determines that the

1) # define is a pre-processing command. It is a simple replacement during compilation and pre-processing, and does not check the correctness. It does not mean that it is correct or not, possible errors are detected and reported only when the

/* The idea is completely messy, so you can write it if you don't have a clear idea at the beginning. I'm dizzy, various wa.Ideas:Find the leftmost vertex d in the bottom of all vertices. Then find the link between D and each other and the

C1 condition include As follows: Code # Ifndef main_h _ # Define main_h _ Other content # Endif When we see the header file, the function is to prevent this header file from being included multiple times. Repeated definitions occur when multiple

# Define usage 1.Simple define Definition # Define maxtime1000 A simple maxtime is defined. It represents 1000. If you write If (I The compiler replaces maxtime with 1000 before processing this code. This definition looks similar to a normal

Fast Fourier Transform C ++ Recursive Algorithm Implementation   Some algorithms on the Internet are incorrectly tested and run, although the Code is non-recursive. To verify the accuracy of the fast Fourier transform, I provide a self-designed

  Original article address: Http://blog.csdn.net/kindazrael/article/details/8108868 In C, Preprocessor is a powerful tool that makes your code easier to read and modify. With preprocessing code, you can redefine a part of the code to make your code

7-3 "three numbers in the middle" Division There is a way to improve the RANDOM-QUICKSORT, is based on the Child array more carefully selected (rather than randomly selected) elements as the principal component to divide. The common practice is

Here is the link to the question: Http://acm.zju.edu.cn/onlinejudge/showProblem.do? ProblemCode = 1090 the topic description is very simple. The coordinates of the three points are given, which are set to A (x1, y1), B (x2, y2), C (x3, y3 ), then

For example, the program file starts with the following # define statement. Copy codeThe Code is as follows: # define N 10 # Define PI 3.14 # Deprecision MAX 10000 # Define Heigth 6.65 ... ... If the program runs an error here, and there is an

I. PHP data output PHP supports a wide range of data types. Later, I will use it again and again. I have knowledge about other languages, so I can better understand the uniqueness of PHP. The following describes the PHP output. The basic output

K-th Number (poj 2104 line segment tree + binary)   Language:DefaultK-th Number Time Limit:20000 MS   Memory Limit:65536 K Total Submissions:40048   Accepted:13081

Bob's RaceTime Limit: 5000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission (s): 2115 Accepted Submission (s): 658Problem DescriptionBob wants to hold a race to encourage people to do sports. he has got trouble in

Seven Puzzle (AOJ 0121 bfs)  Seven PuzzleTime Limit: 1 sec, Memory Limit: 65536 KBSeven Puzzle 7. When there are 8 rows above the square, there will be two rows above the upper limit. When there are two rows above the upper limit, there will be two

Difference between const and # define, (1) Different compiler Processing MethodsThe define macro is expanded in the preprocessing phase. Const constants are used in the compilation and running phase. (2) Different Types and security checks The

Recall: # define usage, Ansi c stipulates that: # can contain spaces or tabs, and # can contain spaces between the command and other parts. It can appear anywhere and the scope ranges from the definition to the end of the file. Before preprocessing,