What is the meaning of char in C language

char is the type that stores a single character in C language, accounting for 1 byte, representing ASCII code. Values ​​in the range of ASCII codes 0-255, including letters, numbers and symbols. Use the "%c" format specifier to print the char variable, but be careful about the possible effects of truncation and implicit conversion.

The meaning of char in C language

char is the type used in C language to store a single character. It occupies one byte of memory, and the value of this byte represents an ASCII code.

char type data

Data of type char can store any valid ASCII code value, ranging from 0 to 255 (unsigned) or -128 to 127 (signed). Some common char values ​​and their corresponding ASCII codes include:

• 'A' -> 65
• 'a' -> 97
• '0' -> 48
• ' ' -> 43
• '\n' -> 10 (line break)

usage

The char variable is usually used to store a single letter, number, or symbol. For example:

 <code class="c">char letter = 'A'; char number = '5'; char symbol = ' ';</code>

These variables store characters with ASCII codes 65, 53 and 43, respectively.

Format specifier

When printing the char variable, use the "%c" format specifier. It prints the characters corresponding to the ASCII code value of the character. For example:

 <code class="c">printf("字母：%c\n", letter);输出：字母：A</code>

Things to note

• The char value may be truncated. For example, if the value of an integer variable is assigned to a char variable, it will only be saved with the smallest 8 bits.
• The char value can be implicitly converted to an int value. This can lead to unexpected behavior.

The above is the detailed content of What is the meaning of char in C language. For more information, please follow other related articles on the PHP Chinese website!