What does 'a' mean in c++

What does "a" mean in C

Direct answer:

"a" in C is a character literal.

Detailed description:

Character literals are usually used to represent a single character, wrapped in single quotes. For example, the character literal "a" represents the lowercase letter "a". Its type in C is char.

Character literals can be used:

• Initialize char type variables
• As part of a string literal
• As in a switch statement case tag
• A single character used as an input or output operation
• Compares or assigns to other character literals

Example:

<code class="cpp">// 初始化 char 变量
char letter = 'a';

// 字符串字面量的一部分
const char* greeting = "Hello, world!";

// switch 语句中的 case 标签
switch (letter) {
  case 'a':
    // ...
    break;
}

// 输入单个字符
char input_char;
std::cin >> input_char;

// 比较字符字面量
if (letter == 'a') {
  // ...
}</code>

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