C++

OnProgramIn the first lesson of logic, when the teacher taught us how to learn the language of the program, he asked a question: "What are the differences between variables and variable names?" I think they are the same, some people must have the

Let the libc of Android coexist with the standard libc, and let the CProgramRun together. In the past, some people always said that the C program can only be statically linked to andriod. Actually, it is not. andriod C It can be compiled into

You can use a macro definition with parameters to call a function, and reduce system startup.Sales to improve operation efficiency. As in C, the use of functions canProgramIt is more modular, easy to organize, and reusable. However, when a function

Windows: using the cocreateguid function (guid) # Include # include # define guid_len 64int main (INT argc, char * argv []) {char buffer [guid_len] = {0}; guid; If (cocreateguid (& guid )) {fprintf (stderr, "Create guid error \ n"); Return-1;} _

Sometimes we often need to use logs when writing programs on the server side. When doing some things over the past few days, we find that there is no log class that I often use, now we have found another very good log class, so we can record it and

This program uses the ICMPv4 protocol (echo request) to test whether the network from the local machine to a server is connected. Because the original socket is used, administrator permissions are required to run the program. PS: This program

The function is very commonly used, and the code is very simple, so I will not explain it much. I will directly go to the code. # Include # include # define maxlen 10240 // read the file filename content to the Dest array, which can read a

The user pointer Data Pointer is often used to call C functions through Python's ctypes module. For example, the window process used to call the Win32 API to generate a window is an example. This example shows how to convert the pointer objects in

This blog (http://blog.csdn.net/livelylittlefish) posted by the author (three two one, small fish) related research, learning content of the notes made, welcome to the majority of friends correct! Use the range operator to solve the problem of

This blog (http://blog.csdn.net/livelylittlefish) posted by the author (three two one, small fish) related research, learning content of the notes made, welcome to the majority of friends correct! Example 1:Define the base class cbase, and define

Gettickcount FunctionFunction: gettickcount returns the number of milliseconds that have elapsed since the operating system was started (elapsed). The returned value is DWORD.Function prototype:DWORD gettickcount (void );VBVB statement:Declare

Recently, because I haven't written basic sorting algorithms for a long time, I don't know how to write the code of these algorithms if I only know the general idea, so I spent one afternoon writing the code of several basic sorting algorithms, so I

The iterator defines a common set of operations, but some iterators have more powerful functions than other iterators. For example, ostream_iterator only supports self-historical, dereference, and copy operations. In addition to these operations,

It took me a few hours to write this log system, and its functions are not complete yet. I will continue to improve it in the future and strive to achieve commercial level. Unicode is not supported currently, but I have already tested how to support

I. The forced transformation of C-style is as follows: (T) expression // cast expression to be of type TFunction-style forces the transformation to use the following syntax:T (expression) // cast expression to be of type TThere is no essential

If a person is a programmer and has no knowledge of memory, I can tell you that he must be boasting. Writing a program in C or C ++ requires more attention to the memory, not only because the reasonable memory allocation directly affects the

Knowledge about bit segments A bit segment is a data structure unique to the C language. It allows us to define a bit segment and assign it a name. Define five variables. In fact, the F1, F2, and F3 variables only need one digit. The variable type

1. Is a parent class having written a virtual function? Can a sub-class overwrite its function without the virtual function realize polymorphism? Virtual modifiers are implicitly inherited. Private is also integrated, but the derived class has no

The trie tree, also known as the dictionary tree, is a tree structure, a variant of the hash tree, and a multi-Cross-tree data structure for quick search. Stores a large number of strings. The advantage is that the common prefix of a string is used

# Include # Include # Include # Include # Include # Include # Include # Include # Include # Define open_dsp_failed 0x00000001/* Open DSP failed! */# Define samplerate_status 0x00000002/* samplerate status failed */# Define set_samplerate_failed 0x00