define or else

Preprocessor commands are very powerful and are used extensively during programming, such as easy to use in version release, 1, #define (tells the compiler that there is a symbol for the given name) #undefine (delete symbol) 2,

The difference between #define, const, typedef#define is not defining variables, it's just for text substitution.For example:#define PI 3.1415926float Angel;angel=30*pi/180;Then, when the program is compiled, the compiler will first "#define PI 3.141

Definition: The # define Directive You can use the # define directive to give a meaningful name to a constant in your program. The two forms of the syntax are: Syntax # Define identifier token-stringopt # Define identifier [(identifieropt,...,

Address: http://coolshell.cn/articles/4758.html I think there are a lot of cool ShellsArticleBut the most visited part is the article "6 abnormal Hello World", and it can be on the right side of the site"Popular"," How to encrypt source code ",

Jency LeeLinks: http://www.cnblogs.com/Jency/articles/C_Cplusplus_define.html1. Simple define Definition #define MaxTime + A simple maxtime is defined, which represents 1000 if you write in the program if (i Compiler replaces maxtime with 1000

If (PHP 4, PHP 5) The IF structure is one of the most important features in many languages, including PHP, which allows code snippets to be executed on a conditional basis. The IF structure of PHP is similar to the C language: As defined in the

In programming, If-else and switch-case are very common branching structures that rarely use these control statements in the program. But it cannot be denied that, in some scenarios, because the branching structure is too long, causing the code to

Branch statements:if else if else; switch case--How to use if else if else:Console.WriteLine ("Please Punch");--Output "please punch"int a = Convert.ToInt32 (Console.ReadLine ());--Define a variable aRandom i = new random ();--Random numberint x = I.

Thanks to http://blog.chinaunix.net/u3/111961/showart_2187819.html first . This is an excellent article. In the last study, we wrote a small client example, which is very simple and the header file generated by using producer-binding-tool is very

The Define () function defines a constant.define () functions: Defines a constant. Constants is much like variables, except for the following differences: constants [constant] and variables [variable] There are many similarities, so it is easy to