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Using heap memory in C + + programming is a very frequent operation. The application and release of heap memory are managed by programmers themselves. However, using ordinary pointers is easy to cause problems such as memory leakage (forgetting to release), secondary release, memory leakage in case of program exceptions, etc. All C++11 introduc ...

concept SEL: method name (number)IMP: a function pointer that holds the address of the method@Selector (method name) gets the number of the method, resulting in SEL type. His behavior is basically equivalent to the function pointer in C languagedifference In C language, the function name can be assigned directly to a function pointer, and the f ...

1, Problem statement Dormitories are equivalent to the existence of home for college students in school life, and dormitories management is an important part of school logistics management. How to intuitively understand the occupancy of dormitories and the accommodation location of each student is an ...

C + + learning diary Double colon scope operator Namespace namespace Using declaration and using compilation instructions The enhancement of c + + to c Memory allocation of const The difference between const and define Inline function extern explicit Singleton mode Up down type conversion Type conver ...

1, OpenSSL memory allocation When users use memory, the error they are prone to make is memory leak. When users call memory allocation and release functions, it is more difficult to find memory leaks. OpenSSL provides built-in memory allocation / release functions. If the user calls OpenSSL's memor ...

1. Introduction 1. What is GCD? The full name is Grand Central Dispatch Pure C language provides many powerful functions 2. Advantages of GCD GCD is Apple's solution for multi-core parallel computing GCD will automatically utilize more CPU cores (such as dual core and quad core) GCD automatical ...

The realization of Joseph's link list in C language Joseph Ring is generally used for games in life Code block linklist.cpp: // linklist.cpp : defines the entry point for the console application. // #include "stdafx.h" #include "linklist.h" using namespace std; int _tmain(int argc, _TCHAR* argv[]) { l ...

LINQ in C ා provides two operation modes: query expression and query operator. All query expressions are replaced by corresponding query operator classes. Query expression is a bit of "class" SQL. When writing SQL in the code, I always feel that it is not "elegant". Using query operators is "elegant". This series i ...

The parameter passed by reference is a major feature of C ා compared with many other languages. It's not easy to understand this concept in depth. It's even more dizzy to mix the value type and reference type.I often see people confuse passing by reference with reference type, which makes me a little annoyed. Plus an interesting question I met ...

(1) Function pointer Definition: if a function is defined in the program, the compilation system allocates a storage space for the function code at compile time. The starting address of this storage space is called the pointer of this function. (2) Calling functions with function pointer variables Small example, take the maximum value #include ...