What is the role of char in C strings

In C language, the char type is used in strings: 1. Store a single character; 2. Use an array to represent a string and end with a null terminator; 3. Operate through a string operation function; 4. Read or output a string from the keyboard.

The role of char in C language strings

In C, char is a data type used to represent a single character. In a string, an array of type char is used to store a sequence of characters.

effect

char mainly plays the following role in C language strings:

• Store characters: Each element in the char array stores one character.
• Represents string: Character arrays usually end with a null terminator ( \0 ) to represent the end of a string.
• String operations: A char array can be operated through various string manipulation functions, such as strcpy(), strcmp(), and strlen().
• Input/Output: A character array can be used to read strings from the keyboard or print strings to the screen.

Example

The following code example demonstrates how to use a char array to store strings:

 <code class="c">char str[] = "Hello, world!";</code>

This array contains 13 characters (including the null terminator).

Things to note

• The char array must end with a null terminator to indicate the end of the string.
• When accessing strings, make sure that the boundaries of the array are not exceeded.
• The char array is different from the std::string class in C, which provides a higher level of string manipulation capabilities.

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