639. [C + +] decoding method II

Title Description A message containing the letters A-Z is encoded as follows: 'A' -> 1 'B' -> 2 ... 'Z' -> 26 To decode an encoded message, all numbers must be grouped and then mapped back to letters according to the original encoding scheme (there may be many ways). For example, "11106" can be mapped to: "AAJF" ...

Posted by ganeshcp on Mon, 27 Sep 2021 15:02:16 +0200

Memory management + function template and class template

The difference between global variables and global static variables: link attributes are different. globavar is visible in all files, while global static is only visible in this file. Relationship between malloc - > operator new - > New malloc new = malloc + failure throw exception; Throw exception (object-oriented way to handle errors) n ...

Posted by brash on Sun, 26 Sep 2021 21:33:51 +0200

Common features of C++ 11

12.Lambda expression Lambda expression is one of the most important and commonly used features of C++11. It is a feature of modern programming languages. Lambda expression has a declarative programming style. 2. Simplicity, avoiding code expansion and function dispersion. 3. Features such as closure of functions in the time and place required. ...

Posted by rkeppert on Sun, 26 Sep 2021 18:38:24 +0200

[learn C together] dynamic memory allocation

Dynamic memory allocation preface: If you can open up memory at will and open it as you use it, can you make the use of memory more efficient? There will be no situation where more development can't be used up and less development can't be used up. Dynamic memory development solves this problem. Open up location Memory can be roughly divide ...

Posted by stuffradio on Sun, 26 Sep 2021 11:57:15 +0200

[C language] Pointer -- the basic knowledge of pointer you must master

preface Pointer is the key and difficult point of C language. Mastering pointer skillfully can better understand the storage mode of calculation, simplify the code and enhance the efficiency of the program. 1, Pointer overview A pointer is a variable that holds the address (number) of the memory unit. Pointer creation When defi ...

Posted by coldfused on Sat, 25 Sep 2021 20:54:37 +0200

Copy constructor, this pointer, assignment operator overload, complete class

Catalog copy constructor this pointer Because this pointer points to its own object, we return this pointer to return our own object Assignment Operator Overload (Assignment Constructor, have I forgotten this statement, I've always called it that way) Complete class (parameterized, parameterized, copy, assignment, destructive) copy con ...

Posted by srhino on Sat, 25 Sep 2021 19:04:03 +0200

C++ Review Notes: Classes and Objects

c++ online compilation tool for fast experimentation: https://www.dooccn.com/cpp/ 1.Write before During this period of time, I plan to pick up c++. One of the lessons I learned from my internship is that Algorithm Engineers solve practical problems, so they can't be limited by algorithms or projects. They should always improve their ability t ...

Posted by idweb on Sat, 25 Sep 2021 18:13:49 +0200

Learning notes of data structure, algorithm and application - C + + language description - competition tree

1, Winner tree Suppose n players take part in a tennis match. The rule of the game is "sudden death": as long as a player loses a game, he will be eliminated. A pair of players play one-on-one, and finally only one player remains unbeaten. We use binary tree to describe the game process. Each external node represents a player, ea ...

Posted by excence on Sat, 25 Sep 2021 12:59:48 +0200

C language fgetc and fputc function usage details

When reading and writing a file as characters, you can read one character from the file or write one character to the file at a time. Two functions are mainly used: fgetc() and fputc(). Character reading function fgetc Fgetc is the abbreviation of file get char, which means to read a character from the specified file. The usage of fge ...

Posted by bigbstanley on Fri, 24 Sep 2021 16:08:14 +0200

Dilworth theorem learning notes

Yesterday, you got dilworth theorem in t2 Middle School of membrane competition. I felt a little wonderful, so I simply studied it 1. Introduction: first review yesterday's film game t2   The main idea of the question is that given n tuples (x,y), the two tuples of X1 < = x2 and Y1 < = Y2 can be divided into one pile. How many piles c ...

Posted by alsal on Thu, 23 Sep 2021 14:18:17 +0200