, doesn't it?However, Ruby is also a very good language. Ruby is one of the best programming languages to learn. And there's a huge, vibrant ruby exchange in every major city around the world. The average Ruby developer's salary is $102,000, and Amazon is one of the best employers.If you plan to develop software, hardware, or even an operating system then you might want to learn C.
Please be sure to learn Select this simple multiplexing model, so you can slowly into the inside Poll,epoll, IOCP and other models.Iv. operation of filesAll programs, basic will use the file read and write operation, Windows system has its own file operation API, such as CreateFile, DeleteFile, etc., please novice do not learn Windows file Operation API, novice please learn standard C language file operation function, Easy to learn and cross-platform
Dark Horse programmer------Foundation of the first C language structure1.1 Basic structure of C language#include The main function, each C language must have a main function and only one main functionprintf: is the standard output function of the C language, which is to outp
-------iOS training, Android training, Java training, and looking forward to communicating with you! ----------I. First C language ProgramSource code: code written by the programmer himselfcompile: The process of translating the source code into 0 and 1 to generate an. o File destination fileLink: Integrate the target file with the C language library file to gene
A company's C/C ++ programmer interview questionsFavorite from http://blog.csdn.net/w3nsirFrom vchelpIt is mainly for students who graduated from the field and those who have less than one year of work experience;Hope to help everyone;Algorithm:1. What is NPC, NP-hard?2. What is the time complexity of Bubble sorting?Speak out at least one Faster Algorithm than it
Dark Horse programmer------Relational and logical operations//Enter a character that, if it is an uppercase letter, is converted to lowercase, and if not, the output of the last obtained character#include intMain () {Charch; printf ("Please enter a character: \ n"); scanf ("%c",ch); CH= (ch>='A'ch'Z')? (ch+ +): ch; printf ("ch=%c\n", CH); return 0;}The 01 relatio
Dark Horse programmer------1.1 Basic grammatical components of C language#include intMain () {#definePI 3.14intR; Doubles; Doublem; //Prompt user to enter RADIUSprintf"Please enter radius: \ n"); //accept the radius of user inputscanf"%d",R); S=2*pi*R; M= pi*r*R; printf ("the circumference and area of the circle are%f%f\n, respectively.", s,m); return 0;}01 identifiers:* Identifiers can only consist of lett
Dark Horse programmer------Six pointers and functions01 Pointers as Function parametersWhen a pointer is an argument, as with a normal variable, it is also a one-way value pass that passes the value of the pointer variable (the value is an address) to the parameter of the modulated function (which must also be a pointer variable). Because the value passed by the formal parameter acceptance argument is an address, the two points to the same variable.*
Dark Horse programmer------Loop structure01-Type Loop whileFormat:while (expression)Statement* The value of the expression after the while is evaluated, and if the value is true, the loop body is executed* Once the loop body is executed, the expression after the while is evaluated again, and its value is true to continue the loop body, whose value is false, exits the loop.* First expression is false, then one loop does not execute* The loop body has m
Dark Horse programmer------1.1 C Language data types01 Integer DataL Integer constant decimal number: starts with a non-0 digit. Octal: Starts with the number 0. Hex: Start with 0x or 0Xl integer variable int, long int, short int,#include intMain () {#definePI 3.14DoubleR; Doubleh; Doubles; //Prompt user to enter two number: radius r, High hprintf"Please enter a radius: Please enter High: \ n"); //accept da
Dark Horse programmer-c language basics 1: keywords, identifiers, comments, dark horse-c
------
I. Keywords
1. What is a keyword?
1> keywords are symbols with special meanings provided by the C language, also known as "Reserved Words"
2> A total of 32 keywords are provided in C
client. The server must learn to select this simple multiplexing model,
In this way, you can gradually dive into poll, epoll, iocp and other models.
Iv. File Operations
All programs use file read and write operations. In Windows, you have your own file operation APIs, such as createfile and deletefile,
Please do not learn file operation APIs for Windows. For Beginners, please learn file operation functions in Standard C language, which is easy to lea
response server by yourself. Write a server and a client. On the server side, you must learn to select this simple multiplexing model so that you can go into poll, epoll, iocp and other models.
Iv. File Operations
All programs basically use file read/write operations. Windows systems have their own file operation APIs, such as createfile and deletefile. Please do not learn Windows File Operation APIs, for beginners, please learn file operation functions in the Standard
Programmer --- C language details 26 (boolean type, continue details in C language, sizeof example, strlen example)Main Content: boolean type, continue details in C language, sizeof example, strlen exampleI. boolean type
Many people may not know that the C language already h
for the largest share of open source projects, but the share is increasingly being overrun by C++/java, and on the other hand, a C + + version that encapsulates the original C program, such as gtk+/gtkmm/ Bakery. The use of new technology for software development, but also a good reuse of the original C program writte
[Good programmer training camp] Objective-C learning notes --- constructor and destructor, objective-c learning notes
In short, constructor initializes an object and initializes some member variables of the object, the Destructor cleans up objects after they are deleted. The code below is used to describe them.
1. Constructor
In OC, all functions starting with
constants:such as ' 6 ',' A ',' F ',' + ',' $ ' and so on. The parentheses are in numbers, lowercase letters, capitals, and other symbols. Here are some of the wrong ways to do this:'ABC','123456', error reason: Only 1 characters can be enclosed in single quotes. ' He ' fresh ' error Reason: Single quotation marks cannot be Chinese characters. String constants:Enclose one or more characters in double quotation marks ("") , which makes up a string constant. like "6" , " male " , " Wow, haha .
. There must be an end condition;3. Continue ends the current loop and enters the next loop;4.break terminates the entire cycle and enters the next procedure;Do{}while ();If the condition is not established, the procedure in the curly braces will be executed first to determine if the condition is satisfied.cyclic structure -for Initialization statements and so on can be multiple sentences (place printf in the for parentheses)For loop nestingfor (statement 1; condition; statement 2) {for (s
Socket Model:Https://www.cnblogs.com/nsnow/archive/2011/05/03/2036017.html http://blog.csdn.net/normalnotebook/article/details/999840 The socket model details The fifth completion port model is very important IOCP server is written in C++/javaTwo I/O modes:blocking mode: waits until the execution of an I/O operation completes without handing control over to the program. The socket defaults to blocking mode. Can be processed through multithreading te
function calls01 general form of function invocation:function name (actual parameter table) if the called function has no arguments, the "actual parameter table can be empty"02 parameter passing between functionsThe rules of C are simple, all the parameters of the C-language function are passed in the "call-to-value" mode, and the parameter passing direction is always passed to the formal parameter.03 Retu
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