String Class (String), familiar with memory management and copy control
Class definition
#include //#include usingstd::cout;usingstd::cin;classstring{usingiterator =Char*; Friend Std::ostream&operatorConstString &); Friend
Clause 11: declare a copy constructor and a value assignment operator for classes requiring dynamic memory allocationWhat is the reason for this clause?If you create a class without doing anything, the class will create a default constructor,
Programming to handle the basic situation of teachers.Requirements:1. Define a "person" class. Used to store and process the person's name, gender, age, member function self-defined;2, the definition of "teacher" category, the public inherits
Keywords: constructors, shallow copy, deep copy, stack (stack), heap heap, assignment operatorSummary:In object-oriented programming, the mutual copying and assignment between objects is a frequent operation.If an object is initialized at the same
Programming to handle the basic situation of teachers. Requirements:1, define a "person" class, used to store and deal with the name, gender, age, member functions of the self-defined;2, the definition of "teacher" category, the public inherits
String
In My Learning life in C + + I found that the string class is very powerful, so we have to simulate it, and in the interview, simulate a string class is also a regular exam, but because of outside constraints we are not possible to simulate
Although the concept has been too much to say, still want to record briefly, for later query.#ifdef _DEBUG#define Debug_clientblock New (_client_block, __file__, __line__)#else#define Debug_clientblock#endif#define _crtdbg_map_alloc#include #ifdef
1.1 String caseMethod prototypesString . ToUpper (); Returns the uppercase form of a string conversionString . ToLower (); Returns the lowercase form of a string conversionFor example, when a user enters a user name, it may be confusing in case of
Although this concept has been widely used, I still want to record it for future queries.
Copy codeThe Code is as follows: # ifdef _ DEBUG
# Define DEBUG_CLIENTBLOCK new (_ CLIENT_BLOCK, _ FILE __, _ LINE __)
# Else
# Define DEBUG_CLIENTBLOCK
#
Even though the concept has been overused, it's a simple one to keep track of.
Copy Code code as follows:
#ifdef _DEBUG
#define Debug_clientblock New (_client_block, __file__, __line__)
#else
#define Debug_clientblock
#endif
The String.Split method provides the following 6 overloaded functions:
name
Description
String.Split (char[])
Returns a string array containing the substrings in this instance delimited by the
Letter combinations of a Phone numberProblem:Iven a digit string, return all possible letter combinations, the number could represent.A mapping of Digit to letters (just as on the telephone buttons) is given below.Ideas:dfs+ BacktrackingMy Code:
Note for splitting strings using the string. Split method in C:String. Split provides us with a very flexible way to use it. However, improper use may cause errors. Most people recently used it in code review:String s = "A | B |: | C: D ";String []
We learned the string. Join function (http://blog.csdn.net/zhvsby/archive/2008/11/28/3404704.aspx) last time, and used the string. Split function, so we can check the usage of this function online, for example:
#Used inString. SplitNotes for using
We learned the string. Join function (http://blog.csdn.net/zhvsby/archive/2008/11/28/3404704.aspx) last time, and used the string. Split function, so we can check the usage of this function online, for example:
#Used inString. SplitNotes for using
We learned the String.Join function (http://blog.csdn.net/zhvsby/archive/2008/11/28/3404704.aspx) last time, When the String.Split function is used, it is possible to check the usage of the function on the Internet such as the following:#used
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