C++

When we talk about macros in C + +, the first thing we think about is "#define", and its basic syntax looks like this:1 #define macroname (para1, Para2, Para3, ..., Paran) macro-bodyThe declaration of a macro is similar to a normal function

1. Assignment operator overloading1. Timing: Assign a value to another existing object with an existing object . The assignment behavior that occurs after two objects have been created.2. The assignment operator overload is provided by default and

C and C + + 's respective characteristicsC is a structured language that focuses on algorithms and data structures. The design of C program is the first consideration is how to pass the process, the input processing to get output. For C + +, first

The contents are collated from foreign C + + textbooksConsider a simple example: suppose there is a vector your task is to count the number of strings that are less than 5 in length, and if you use the COUNT_IF function, your code may grow like this:

Recently due to the preparation of papers related matters, resulting in a slow blog update speed, I hope you forgive me. However, the update is still updated, so today I will squeeze out a little time to update one. Since the previous blog post has

1. Introduction 　　 threads (thread)Technology was put forward in the 60 's, but the real application of multithreading to the operating system was in the middle of the 80 's, and Solaris was the leader in this area. Traditional UNIX also supports

Zhu JinchanSource: http://blog.csdn.net/clever101Cross-platform C + + open source code to adapt to the compilation of a variety of compilers, the use of two ways to fit. One is the makefile way. Taking the famous Spatial data format parsing library

Today, when I wrote Qt, I encountered two classes of mutual problems, Class A To use Class B, class B to use the Class A.Class A:a.h#ifndef a_h #define A_hclass a{public: A ();}; #endif // a_hA.cpp" a.h " a::a () { b b;}Class B:b.h#ifndef B_h

Header files: #include The function atof () is used to convert a string to a double-precision floating-point number (double) whose prototype is:Double atof (const char* str);The name of Atof () is derived from the abbreviation of the ASCII to

#pragma  once#include//with one probe    two probes #include #include Using namespace std;enum status{exist,empty,delet,};template  //key/value form Structure Body struct kv{k _key; v _value; KV (Const k& key = k (),  const v& value = v ()): _key

has been on the C + + DELETE and delete[] The difference is not very understanding, today encountered, surf the internet for a moment, came to the conclusion. Make a backup to avoid loss.C + + tells us to use delete[] when reclaiming the memory

In C + + deep copy and shallow copy problem is more important, a brief introduction to the meaning of deep copy and shallow copy, in C + + class by default There are six functions, copy constructor is included in the process of running the program,

Before running this program, you need to shut down the Windows firewall, Win7 system shutdown Firewall method is in the control Panel \ System and security \ Windows Firewall \ Custom settings path, the "home or work (private) network location

Http://www.wxzzz.com/1860.htmlWindows Communication Foundation (WCF) is a series of application frameworks developed by Microsoft that support data communication and can be translated into the Windows Communications development platform. integrates

1. Create a new Calculator.cs fileThe code is as followsUsing System;namespace myclasslib{public class Calculator {public int Add (int a, int b) {        return a + B;        } public int Sub (int a, int b) {return a-A; }    }}2, compile the

command-style data parallelismVisual C # 2010 and. NETFRAMEWORK4.0 offers many exciting new features that are designed to deal with the complexities of multicore processors and multiprocessor. However, since they include complete new features,

Show.h#ifndef __ocday01__show__#define __ocday01__show__#include extern void Testtshow (); #endif/* Defined (_ _OCDAY01__SHOW__) */Show.c#include "Show.h" void Testtshow () { printf ("I am a function in the famous C file, who dares to invoke? ").

#include #define TAX_RATE1 0.15#define TAX_RATE2 0.2#define TAX_RATE3 0.25#define SALARY_RATE1 1.5#define LEVEL1 8.75#define LEVEL2 9.33#define LEVEL3 10.00#define LEVEL4 11.20double calculate_salary (int time,double pay){double salary;if

STL container stack basic usage summary, stl container stack Summary /* Stack container Methods: push (), pop (), top (), empty (), size () * // # include #include using namespace std; int main () {stack s; // defines the stack s. push (1); //

Remember the clever ideas of the non-window (windowless) npapiwindowless API plug-in and then the superb experience process to solve the problem. 1: Problem Integrates third-party ocx controls for pdf display and signature. If you use a window