C++

Get file size There are two ways to do this:Method One,Example: Unsigned long get_file_size (const char *path) { unsigned long filesize =-1; FILE *FP; fp = fopen (Path, "R"); if (fp = = NULL) return filesize; Fseek (FP, 0L,

1. Functions defined inside the class implicitly feel inline, the inline function should be defined in the header file, because its definition must be visible to the compiler, so that the compiler can expand the code of the function within the call

First, the article for the reasonI now use C + + many other. But once Java also wrote a lot, Java and C + + very much like, but dig some, Java and C + + very big difference, take just send another blog virtual function and multi-state, inside feel

1. Input a line of English sentences through the keyboard, statistics the number of English letters and words, the words separated by a space (punctuation is not counted words)#include"stdafx.h"//through the keyboard input a line of English

The meaning of a handle class exists to compensate for the tile effect that occurs when a derived class object is assigned to a base class object. For example, the following programs:Multimap Basket; Base base;derived Derive;basket.insert

The return value of the function is used to initialize the temporary object that is created in the calling function.1. The return value is non-reference type:The return value of the function is copied to the temporary object. The same way that

Feel it directly on the code:#include using namespace Std;int main (){int a=3;int* p1=&a;int* p2=new Int (8);coutDelete P1;Delete P2;coutreturn 0;}Output Result:3 3 0x28fef4 8 0x7318703 3 0x28fef4 0x731870Thus the conclusion is shown in title.C + +

This series of articles by the @yhl_leo produced, reproduced please indicate the source. Article Link: http://blog.csdn.net/yhl_leo/article/details/50782792 In deep learning, when making a sample dataset, it is necessary to produce and

Const fvector2d& PT1 = position of First point; Const fvector2d& PT2 = position of second point; float EdgeRadians1 = fmath::atan2 (Pt2.y-pt1.y, Pt2 . x-pt1.x); const fvector2d& PP1 = Position of the second point; Const fvector2d& PP2 = Position of

Basic knowledge of C #-arraysDefined:Arrays: can have any number of data of the same type, and the data stored in the array is called an array item.Index of Array (subscript): In the array, each array item has a number called the index or subscript

#include #includepthread_mutex_t mutex;pthread_cond_t cond;void*thread1 (void*Arg) {Pthread_cleanup_push (Pthread_mutex_unlock,&mutex); //provides function callback protection while(1) {printf ("Thread1 is running\n"); Pthread_mutex_lock (&mutex)

"1" First we start by creating a JSON character to goString json = @ "[{' Phantom ': TRUE, ' id ': ' 20130717001 ', ' data ': {' MID ': 1019, ' Name ': ' AACCCCC ', ' Des ': ' cc ', ' Disable ': ' Enabled ' , ' Remark ': ' CCCC '}}] ";"2" First we

Not very good at writing articles, probably title it. Not much to say, direct sticker code.　　1 Public Static stringTitletoupper ( This stringstr)2 {3 if(string. Isnullorwhitespace (str))4 return string.

1. Any programming language has relevant data types. C # is no exception, its basic data types are int,short,long,float,double,string and so on. Data types can be converted to each other. However, the conversion process should be aware that small

First, the Commission 1. For class comparisons, classes are declared with class, and delegates are declared with delegate.2. The delegate should point to a real method.3. The signature of the delegate, as directed by the method. //1. Declaring a

About. NET, there are three common methods:Assembly.Load ()Assembly.LoadFrom ()Assembly.loadfile ()Let's talk about the difference between these three methods and some details.1. Assembly.Load () IntroductionThe load () method receives a string or

An interface can be considered a behavior contract between code that belongs to a different inheritance tree. The interface of C # is equivalent to a special abstract class, which has only virtual methods inside it.Use of one interfaceA) The

1.async awaitprivate void Form2_load (object sender, EventArgs e) { Console.WriteLine ("Main:" + THREAD.CURRENTTHREAD.MANAGEDTHREADID); Dosth (); No await does not wait for dosth execution to complete directly eject

In the Windows environment, the command-line program for Cmd.exe, is a 32-bit command-line program, Microsoft Windows system based on the Windows command interpreter, similar to Microsoft's DOS operating system. Enter some commands, Cmd.exe can be

A function is an important part in any language, no matter what kind of program is composed of more or less functions. The use of a function, divided into declarations and calls two steps. Declaration of a function Static return type