C

Some simple C language algorithms and simple C language Algorithms 1. Enter a number to print the following figure. Input 5 Print: * ** *** **** ***** # Include Int main (int argc, const char * argv []) { Int num, I, j; Scanf ("% d", & num ); For

Gcc shared object, gccshared An example of generating a dynamic link library *. so is introduced: first create a new 1 Head file test. h: #include void first();void second();void third(); Create three source files first. c/second. c/third. c: First.

The library file cannot be found for FFmpeg compilation and ffmpeg compilation. When compiling FFmpeg, use./configure for configuration, and the library file cannot be found often, for about two reasons: 1. No library file is installed or the

Login, Login First, drag a label (write user name) followed by a Textbox Label (WRITE password) is followed by a Textbox (you need to set the property-behavior-useSystemPasswordChar (the default password entered is a black dot )) Add the Button

C language memset () function, C language memset Function 1) Name: memset () function 2) alias: char type initialization Function 3) function: sets all the content of each byte in the memory to the ASCII value specified by ch. The block size is

[Relationship between Assembly and C Language] 2. main Function and startup routine, main routine Why is the assembler entry _ start, and the C program entry is the main function? Let's explain the problem as follows: In the x86 assembler BASICS (AT&

Expression puzzles, expressions I. Judge odd numbers When it comes to determining odd numbers, the first response is I % 2 = 1; however, this is a big problem; The statement of negative number is incorrect !! BecauseNegative % 2 =-1 　　So it can be

Nim Game, Reverse String, Sum of Two Integers, nimintegers The following are the questions I wrote today: 292. Nim Game You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns

[Reprinted] cvGetSize and cvSize, cvgetsizecvsize CvSizeRectangle frame size, in pixels Typedef struct CvSize {int width;/* rectangle width */int height;/* rectangle height */} CvSize;/* constructor */inline CvSize cvSize (int width, int height );

Getopt, getoptlong learning, getoptgetoptlongGetopt and getoptlong are used to parse command line parameters. 1. getopt #include extern char *optarg; extern int optind, extern int opterr, extern int optopt; int getopt(int argc, char * const

In libcurl, The curlmulti_perform () function is used to execute the subscription type url.Prerequisites When you need to process multiple URLs at the same time, you can use curl_multi_perform to execute the following code 1: 1 // initialize a multi

1) sequential storage of linked list --- Code 2, storage --- Reference: 1) big talk Data Structure 2) http://blog.chinaunix.net/uid-20680669-id-147844.html 3) http://blog.csdn.net/strommaybin/article/details/51919464   1. Linear table (list): finite

A practical program for reading data from text files and sorting text filesProgram description This is a very reliable program, which has a very powerful ability to identify errors. Programs include file operations, Merge Sorting, string input, and

Deep understanding of source code, reverse code, complement code, and reverse Code complement This article describes the computer's original code, reverse code, and complement code. in addition, I thoroughly explored why the back code and complement

Ackerman function, ackerman Function Leave an introduction first: Function Definition: It can be seen from the definition that it is a recursive function. The akeman function not only increases values very quickly, but also has a high recursion

Basic storage class and dynamic memory allocation, storage class dynamic memory For more information, seeC Primer Plus (sixth edition)BookStorage Class and Memory Distribution A brief introduction is given to the storage class of the variable and

Socket_Internet namespace, socket_internet Currently, Internet supports two address formats: 1, IPv4 (32-bit address format) 2, and IPv6 (128-bit address format ). The IPv4 namespace is PF_INET, And the IPv6 namespace is PF_INET6. #incldue int

Linux C lock pages, linuxlockpages  Virtual Memory is divided by page. We can clearly tell the system that a virtual memory page needs to be associated with the actual memory frame. In this way, the memory page is swapped in and won't be swapped out

[Switch] Linux C dynamic memory leakage tracking method, linux dynamic memory Original article: http://www.cnblogs.com/san-fu-su/p/5737984.html   C. There is no garbage collection mechanism in it. Sometimes you have applied for dynamic memory but

Semi-dynamic linux C memory management and linux memory management What is the first reaction when I see a semi-Dynamic Request for memory? In fact, the semi-dynamic memory application is easy to understand. It is implemented using the alloca