Integer type of C language

List of articles

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• ​ ​ Integer types ​​

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• ​ ​1. Basic introduction ​​
• ​ ​2. Case presentation ：​​
• ​ ​3. The type of integer ​​
• ​ ​4. Details of the use of integer ​​
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Integer types

1. Basic introduction

• C The integer type of language is used to store integer values , such as 12 , 30, 3456 wait

2. Case presentation ：

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        int num = 10;
       
       

        
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3. The type of integer

4. Details of the use of integer

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2. Various types of storage sizes and operating systems 、 The number of bits in the system is related to the compiler , At present, the common is 64 Bit system is the main
   
3. In practice ,c Programs usually run on linux/unix Under the operating system . Level 2 exam , Use windows
4. C Integer type of language , Divided into signed ​​signed​​ And no sign ​​unsigned​​ Two kinds of , The default is ​​signed​​
5. C Integers in programs are often declared as ​​int​​ type , Unless it's not enough to show a large number , Only use ​​long long​​
6. ​​bit​​( position ): The smallest unit of storage in a computer .​​byte​​( byte ): The basic storage unit in a computer .
   ​​1byte = 8bit​​
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• 【 A simple example ​​short 3​​​ and ​​int 3​​​】
  ​​​short 3​​​ Occupy... In memory ​​2​​​ byte
  ​​​int 3​​​ Occupy... In memory ​​4​​​ A word