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system requirements The differences between different versions of ssdss can be seen as follows: ssdss1, look for the corresponding version, such as the latest version is 2.5.6, so we have to look at the requirements of the corresponding version. ssdss2, click "Getting Started" to view related system requirements ssdss 3. We fo ...

An introduction We learn variables so that the computer can remember a certain state of things like people, and the value of variables is used to store the state of things. Obviously, the state of things is divided into different types (such as people's age, height, position, salary, etc.), so the value of variables should also have dif ...

1, Process oriented and object oriented The programmer has changed from a process oriented executor to an object-oriented commander 2, Creation and use of classes and objects Class definition Modifier keyword class name{ Properties and fields; method(); } //For example, we create a Person class class Person{ //Human char ...

File descriptor By opening a FILE with the open function, you can get a structure that stores all the attributes of the FILE (similar to the FILE of standard io), but not exactly like standard io. The open of system io will store the pointer of the structure in an array, and then return the subscript of the pointer in the array, but an int ...

Multithreading 1, Process and Thread A program is an ordered collection of instructions and data. It has no running meaning and is static A program in process execution is a dynamic concept. It is the unit of system resource allocation Usually, a process can contain multiple threads. There is at least one thread in a process. Thread is the ...

Exercise 7-8 The square matrix moves to the right. Read in two positive integers m and n (1 ≤ n ≤ 6), then read in the n-order square matrix a, and move each element in the square matrix to the right by m positions, that is, columns 0, 1,..., n-1 are transposed into columns N-M, n-m+1,..., n-1, 0, 1,..., n-m-1. The moved square matrix ca ...

Thread creation Inherit Thread class You can create a Thread by inheriting the Thread class and creating an object through new. public class MyThread extends Thread { private int count = 5; @Override synchronized public void run() { super.run(); count--; System.out.println("from " + this.curre ...

Synchronized property Reentrant Reentrant refers to the outer function of the same thread. After obtaining the lock, the inner function can obtain it again. What people say is: If a thread gets a lock, it can continue to use it once it gets the lock. After the outer function obtains the lock, the inner function can continue to use the loc ...

[Linux high concurrency server] producer and consumer model Article overview This article is a personal note of Niuke C + + project course: Linux high concurrency server, which records some knowledge points of producer and consumer model Author information NEFU 2020 zsl ID: fishingrod / fishing rod Email: 851892190@qq.com You are welcome ...

Two uses of Synchronized Object lock It includes method lock (the default lock object is this, that is, the current instance object) and synchronous code block lock (specify the lock object yourself) Class lock A Synchronized method that modifies a static or specifies a lock as a Class object Example No synchronization effect public clas ...