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The difference between 'a' and 'a' in C language

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Release: 2024-05-07 10:40:56
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'a' and "a" represent different character constants in the C language: 'a' is a character, and "a" is a string containing one character. They differ in type, storage, usage, syntax, and examples.

The difference between 'a' and 'a' in C language

The difference between single quotation mark 'a' and double quotation mark "a"

'a' and "a" There are different character constants in C language. The main differences between them are as follows:

1. Type

  • 'a' is a character constant, Represents the single character 'a'.
  • "a" is a string constant, representing a string consisting of one character 'a'.

2. Store

  • 'a' is stored as an 8-bit ASCII code value 97.
  • "a" is stored as a character array where the first element is 97 and the second element is 0 (null character).

3. Use

  • #'a' to represent a single character, such as in a single-character variable or as a character in a string .
  • "a" is used to represent a string, such as in a string variable or as a literal string in a program.

4. Syntax

  • 'a' Use single quotes, for example: 'a'.
  • "a" Surrounded by double quotes, for example: "a".

5. Example

char ch = 'a'; // 将 'a' 存储在字符变量 ch 中
char *str = "a"; // 将字符串 "a" 存储在字符串变量 str 中
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Summary:

'a' and "a" in C language are different character constants, 'a' is a character and "a" is a string containing one character. They differ in type, storage, usage, syntax, and examples.

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