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7. The third C programFirst, take a look at the following small program and try to compile and run it by yourself. If you do not know how to compile, click the following hyperlink:Compiler usageCompiler Dev-C ++ download tutorial /* Circle. c -- calculate the area of the circle */ # IncludeStdio. h> Int main (void){Fl

C # enumeration (enum) An enumeration is a set of named integer constants. Enumeration types are declared using the enum keyword. C # Enumerations are value data types. In other words, the enumeration contains its own values and cannot inherit or pass inheritance. Declaring an enum variable General syntax for declaring enumerations: Enum which ENUM_NAME Specifies the type name of the enumeration. The enume

explained the conditional operators in the previous chapters. : Can be used instead of if...else statements. Its general form is as follows: Exp1? EXP2:EXP3; Among them, EXP1, EXP2, and Exp3 are expressions. Notice the use and position of the colon. ? The value of an expression is determined by EXP1. If EXP1 is true, the value of EXP2 is computed and the result is the whole? The value of an expression. If EXP1 is false, the value of EXP3 is computed and the result is the whole? The value of

Public classMrzhang {//In fact, the sad figure of buying a ticket is Xiao Zhang Public Static voidBuyticket () {Console.WriteLine ("NND, let me go to buy tickets every time, chicken man! "); } Public Static voidBuymovieticket () {Console.WriteLine ("I'll go, pick up the girls, and let me bring the movie tickets! "); } } //Xiao Ming class classmrming {//declaring a delegate is, in fact, a "command." Public Delegate voidBugticketeventhandler (); Public Static

range of Int. Then, for the second printf, regardless of whether we use%HD or%d, the output results are the same. This is because the c language standard stipulates that when the short type value is passed to the function, it is automatically converted to the int type value. It is converted to int because int is designed to be the most efficient integer type of computer processing. So, for computers with a short and int size, converting the variabl

); Console.WriteLine ("Remarks: {0}", DBI. Message); }}//Traverse Method property foreach (MethodInfo m in type. GetMethods ()) {foreach (Attribute A in M.getcustomattributes (true)) {Debugin Fo dbi = (debuginfo) A; if (null! = DBI) {Console.WriteLine ("Bug No: {0}, for Method: {1}", DBI. Bugno, M.name); Console.WriteLine ("Developer: {0}", DBI. Developer); Console.WriteLine ("Last reviewed: {0}", DBI. Lastreview); Conso

status); The event Boilerloghandler Boilereventlog is defined based on the delegate above; public void Logprocess () {String remarks = "O. K"; Boiler B = new boiler (100, 12); int t = b.gettemp (); int p = b.getpressure (); if (T > | | | t When the above code is compiled and executed, it produces the following results: Logging info:temperature 100Pressure 12message:o. K The above is the "C #

the concept of an anonymous method: Using system;delegate void Numberchanger (int n); namespace delegateappl{class Testdelegate {static int num = 10; public static void Addnum (int p) {num + = p; Console.WriteLine ("Named Method: {0}", num); } public static void Multnum (int q) {num *= q; Console.WriteLine ("Named Method: {0}", num); } public static int getnum () {return num; } static void Main (string[] args) {//Use anonymous method

anonymous method or a naming method, that is, passing method parameters to the delegate object. For example: nc(10); Instance The following example demonstrates the concept of an anonymous method: Using System; delegate void NumberChanger (int n); namespace DelegateAppl {class TestDelegate {static int num = 10; public static void AddNum (int p) {num + = p; Console. writeLine ("Named Method: {0}", num);} public static void MultNum (int q) {num * = q; Console. writeLine ("Named Method: {0}", num)

[Study Notes-Objective-C] Chapter 10 object initialization and objectivec initialization in Objective-C-Basic tutorial 2nd10.1 allocate objects When an alloc message is sent to a class, a large enough memory can be allocated for the class to store all instance variables of the class. At the same time, alloc initializes all the memory areas to 0. The newly allocat

Object-C Development tutorial -- MRC and ARC hybrid editing, object-c -- mrc After iOS5.0, you can use ARC (Automatic Reference Counting: Automatic Reference count) to replace the previous MRC (Manual Reference Counting: Manual Reference count ). Using ARC reduces the trouble of code and forgetting to release objects. But everything has two sides. If you want to

C # ADO database accessWhat I want to talk about in this section is something that everyone cares about and is certainly very interested in. hey hey, it's also the best part of my tutorial-ADO database access. this reminds me of the "database access" series I wrote last year! So, if you think it is hard to understand the record set or something like that, I recommend you read my articles first. Well, let's

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Below are all the complete tutorials for C languageC Language Tutorial (i): The theoretical basis of program developmentC Language Tutorial (ii): Development Environment ConstructionC Language Tutorial (iii): binary and binary conversionsC Language Tutorial (iv): Constants,

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