not to know the answer.Infinite Loops)
4. Infinite loops are often used in embedded systems. How do you write an infinite loop in C?There are several solutions to this problem. My preferred solution is:
While (1){?}
Some programmers prefer the following solutions:
For (;{?}
This implementation method makes me embarrassed because this syntax does not exactly express what is going on. If a candidate provides this solution, I will use this as an opportu
when you write your own code.Furthermore, drain is only available for Mac OS 10.4 and above, and release is available for all versions.The object will be automatically freed only if it is added to NSAutoreleasePool when the autorelease message is sent to an object.such as: [Car autorelease];Gold Guidelines for memory management:Only objects created through the Alloc, new, and copy methods require the programmer to send release or autorelease messages
!!”);
When you find that you do not know enough about the C language (Appendix A is really lightweight), it is time to pick up the second book.
2. C expert Programming
This is a magical book, because it tells you exactly what happened behind the code in a very entertaining way. After introducing the strange things of several famous bugs (most of which are related to NASA), readers will once again lea
straightforward, which function you want to refer to by using extern to declare which function. This is probably a reflection of the kiss principle! One obvious benefit of this is that it will speed up the process of compiling the program (to be exact, preprocessing) and saving time. This difference is very noticeable during the large C program compilation process.3. In addition, the extern modifier can be used to indicate the invocation specificatio
name ();Here's an example of a specific function to practice the feeling of a function:1 /*2 1. Find the difference between two numbers3 2. Print a horizontal line4 3. Print N Horizontal lines5 */6#include 7 intMinus (intAintb)8 {9 returnA-b;Ten } One A voidPrintLine ()//because only one horizontal line is required, no return value is required and no formal parameters need to be defined - { -printf"--------\ n"); the } - - voidPrintlines (intN//n horizontal lines are undefined so define l
; Arithmetic operators > Relational operators > > | |? expression! (3>5) | | (2, then calculate 1 0, the equation becomes 1 | | 0, the final result is 1.? Expression 3+2The expression 4>3 !-5>2 equivalent to (4>3) ((! ( -5)) > 2) with a result of 0?Seven or three mesh operationThe three-mesh operation is also called the conditional operationThe conditional operator is the only operator with 3 operands, and is sometimes called a ternary operator. For conditional expression B?x:y, the bar is ca
semicolonFor a compound statement, such as:{ z=x+y; T=z/; printf ("%f", t);};You should not add a semicolon after the curly braces of a compound statement, otherwise it will be superfluous. Another example:if (a%3==0);i++;This is if 3 is divisible by a, then I plus 1. However, because if (a%3==0) after the addition of semicolons, the IF statement to the end, the program will execute the i++ statement, regardless of whether the 3 divisible a,i will automatically add 1. Again such as: fo
cycle of a stack variable is managed by the OS, and the life of the stack variable ends in the process of unwinding the stack. But after adding the static modifier, the variable is not stored in the stack, but is stored with the global variable. At the same time, it cannot be used after the function that defines it, but it can continue to be used if the function that defines it is called again, and the value left after the previous call is saved. Static modification of a function is similar
Dark Horse programmer--c Language learning experience--pointers-------Java training , Android training ,iOS training ,. Net Training , look forward to communicating with you! -------1. Open Filefopen (file name, open mode);For example:FILE *FP = fopen ("A1", "R"); Returns a pointer to the file (the file's first address in the memory buffer)The fopen function inverse value is a pointer to a A1 file, usua
Focus on today's headlines-do the full stack siege Lion, learn the code to read, love the whole stack, more love life. Provide programmer technical and life guidance dry goods.If you really want to study, please comment on each article that you have learned, and record the traces of your studies.Please write the code mentioned in all the tutorial articles at least three times to achieve a familiar effect.Last lessons:. Programmers take you on Android
C # programmer's understanding of TypeScript
This article shows you in detail the process of learning TypeScript from the perspective of C # programmers. It mainly compares the similarities and differences between the two languages and hopes to help you.
Introduction
TypeScript has been developing well. When developing new functions and considering the maintainability of the program, we used TypeScript to w
function, use the pointer variablePA,PBis an argument and is called when the value is determined separately.Cprstrfunction. Because of the pointer variable usedPAand thePSS,PBand thePDSall point to the same string, so the main function and theCprstrthese strings can be used in functions. You can also putCprstrThe function is simplified to the following form:Cprstr (char *pss,char*pds) {while ((*pds++=*pss++)! = '/0 ');}That is, the movement and assignment of pointers are combined in a single st
"true",!!! (4>2) The result is 0, which is "false"C language provisions: Any non-0 value is "true", only 0 is "false". Therefore, a non-0 value is not logical! The result of the operation is 0, the value of 0 is logical non! The result of the operation is 1.! 5,!6.7 、!-9 results are 0,!0 results of 14. Priority levelThe order of precedence for logical operators is: parentheses () > minus sign->! > Arithmetic operators > Relational operators > > | |A
, execute. But it's a little bit different from the C language.is to add a frame (indicating the –framework parameter) used in the OC program during the link phase, for example:Ø Compile: cc–cmain.m test.mØ Link: cc main.otest.o–framework FoundationØ run:./a.out9. A complete OC programSummarize the previous description, you can no longer be unfamiliar with the OC program, below is a complete OC version of Hello World[OBJC]View Plaincopy
#impo
level.
Then concentrate on improving the level of C + +, you can choose the "C + + programming ideas", and then see "effective C + + Chinese version 2nd Edition" and "more effective C + + Chinese version", these two books introduced the efficient use of C + + valuable expe
) Setfillcolor: (Shapecolor) C{Fillcolor=c;}-(void) Draw{NSLog (@ "Drawing a circle at (%d%d)%d) in%@",Bounds.x,bounds.y,bounds.width,bounds.height,colorname (Fillname));}@endThe Hidden object self corresponds to this in C. Self->fillcolor to access member variables.11. Call the written class and class functions:Creating a new object, using the default initializa
Dark Horse programmer--c Language learning experience--function passing two-dimensional array-------Java training , Android training ,iOS training ,. Net Training , look forward to communicating with you! -------First, you must initialize the pointer when you define it.Variables are initialized when they are defined, which is a good habit of ensuring that there is no error. Especially in the use of poin
Link to tenka1 programmer contest C-align
Given a sequence, require the maximization \ (\ sum _ {I = 2} ^ {I = n} | a_i-a _ {I-1} | \), \ (n \ Leq 10 ^ 5 \)
Small, fresh, greedy, first put the largest first, and then consider the following four decisions in sequence:
Minimum left, minimum right, maximum left, and maximum right.
Each time the \ (MAX \) is obtained and the Left and Right endpoints are up
English Source: Mycplus---top-ten-c-language-resourcesSome people find programming boring, and some people think it's fun. But every programmer has to keep up with the trend of programming languages. Most programmers learn to program from C, because C is the most common language used to write operating systems and appl
of a logical operation is only two: true (0) and False (1)"and : conditions 1 conditions 2 only the condition 1 and Condition 2 are established, only for true otherwise false.""or | | : Condition 1 | | Condition 2 When one of the conditions 1 or Condition 2 is true, it is false when it is not established."No!" : ! Conditions, take the reverseNote: When a logical operator is operating, the following conditions are ignored, as long as the integrity of the whole can be determined.Int a=b=10;Int
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.