Take you step by step to learn C (one)

One 、 What is? C Language

Language is a tool for communication , For example, Chinese people communicate in Chinese , Americans communicate in English , What people use to communicate with computers is computer language ,C Language is a computer language , It is widely used in low-level development . Here is a brief introduction to what is the bottom layer ：

When you buy a computer , It's just an iron pimple , Just a piece of hardware , We can use it because the operating system has been installed in it , Connecting hardware and operating system is a thing called driver . Most of the time, we only care about the top , That is, the software we installed , These are done on the operating system .C Language is good at low-level development , But it is not weak in the upper development .

The original computer language , Is a complex binary sequence , Only 0、1 Two numbers . Called binary instructions .

Later, for convenience , Assembly instructions are used , That is to simplify the fixed binary sequence , for instance , If you want to execute the instruction of adding , Before assembling instructions , We need to knock many 0 and 1, But now , We only need to knock one ADD Can mean addition , The computer reads ADD It will be converted into the corresponding binary sequence .ADD Such assembly instructions , Called mnemonics .

Later, it slowly developed B Language 、C Language , here we are C Language , It's already a high-level language , Ready to use C Language programming is already very simple .

  For better specification C Language ,ANSI Defined C Language standards , In turn, is C89、C90、C99、C11 standard , Use C Language programming has many compilers , The compiler used in the following is Visual Studio 2019.

A brief explanation “ compile ”, When we use C When language writes a code , The suffix of the file name is .c, What is stored inside is what we write , But the computer itself cannot understand , So we need to convert it into binary language , This process is called compiling , After compiling , After a series of processes , It will generate one with .exe Executable program with suffix .

Two 、 A simple C Program

How to use the compiler ？

 

 

 

  We can start typing code from this interface , The next article will take you through data types , And try to take you to type the code , If it helps you, just like it , If you have any questions, you can leave a message in the comment area or send me a private message .