C

Basic concepts of automatic release poolThere is an Autorelease Pool concept in cocoa. As the name suggests, it can store some entities.Set. Objects in the Auto Release pool can be automatically released. The NSObject class provides an

  Code:   #include #include #include #include #define SKIP_LIST_INIT_LEVEL 5struct list_node_s;struct list_s;typedef struct list_node_s list_node_t;typedef struct list_s list_t;struct list_node_s {int key;void *value;

Through the analysis of the compilation code generated by the C language program compiled by GCC, we can clearly understand the internal working principle of C statement running mechanism, memory allocation mechanism, and so on hidden under C

The C language return value cannot be used to directly write arrays. # Ifndef _ VMATH_H # define _ VMATH_H # ifdef _ cplusplusextern "C" {# endiftypedef float Matrix44f [16]; Matrix44f translate (float x, float y, float z ); round scale (float x,

  The process of program startup is summarized as follows: 1. The main function of the program entry creates the UIApplication instance and the UIApplication proxy instance. 2. Rewrite the startup method in the UIApplication proxy instance and set

#include #include #include #include readtext.h#ifdef _APPLE_#include #else#define FREEGLUT_STATIC#include #endif#pragma comment(lib, readtext.lib)GLuint vShader, fShader, programHandle;GLint vaoHandle,

Reprinted please indicate the source: http://blog.csdn.net/ns_code/article/details/19174553 About Huffman Tree The Huffman Tree, also known as the optimal binary Tree, is a type of Tree with the shortest length of the weight path. Assume there are n

Fibonacci series: It is also called the golden split series, which refers to a series of 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89,144 ,... In mathematics, the Fibonacci series are defined as follows by recursive Methods: F0 = 0, F1 = 1, Fn = F (n-1)

There are two algorithms to determine whether a game can win or lose:   1. scan the entire board to see if there are five links in four directions. This algorithm is used to find the source code of many five games on the Internet. This means that

1. good at using symbolic constants. It is no good to bury a number in a program. On the one hand, it cannot provide information to people looking at your program in the future. On the other hand, it is also very troublesome to modify the

Zookeeper 1. What is alignment and why:1. in modern computers, memory space is divided by byte. Theoretically, it seems that access to any type of variables can start from any address, however, the actual situation is that access to specific

  Basic concepts of key-value Encoding1: Key-value encoding is a mechanism used to introduce Access Object Attributes. Using this mechanism, you do not need to call access methods and variable instances.You can access object attributes.2:

Another starting point of program optimization is to reduce the amount of computing in the running process. There are two major ideas: 1) transfer part of the computing workload to offline, or move part of the work out of the program for manual

Knoppix @ Microknoppix:/mnt-system/lx/test $ gcc-D_REENTRANT-lpthread-o testcondout. cKnoppix @ Microknoppix:/mnt-system/lx/test $./testcondout Please input an integer :( Time outTime out1/1 finished, push 1.00000000001/2 finished, push 0.50000000001

Key points:After the program ends with an exception, the core code file program is generated to add the-g compilation option, which contains debugging information to locate the exception points in combination with the gdb and coredump files. After

When reading svm. h, we found the following code: #ifndef _LIBSVM_H#define _LIBSVM_H#define LIBSVM_VERSION 317#ifdef __cplusplusextern "C" {#endifApparently, the first three lines of code are intended to prevent repeated references to header files.

We will share with you the code below. There are two methods to achieve this: # Include Int main () {char * src = "hello world"; int len = strlen (src); char * dest = (char *) malloc (len + 1 ); // allocate a memory space char * d = dest; char

Comment in the code segment ";" The Assembly Code is as follows: Dp @ dp :~ % Cat test1.s . Section. rodata Output: . Asciz "the number is % d \ n" . Section. data Value: . Int 0, 0, 0, 0, 0, 0, 0, 0 . Section. text . Globl main Main: Movl $0, %

We have introduced how to introduce some features of object-oriented language to object-oriented programming in C. Starting from this article, we will use the techniques mentioned above to implement several examples in succession, finally, a basic

1: Basic concepts of ArraysIn Foundation, an array (NSArray, NSMutableArray) is a set of ordered objects, which are obtained through index subscript.Each element. Similar to a string, an array is also a variable or an unchangeable array. In addition,