How to write the range after case of switch statement in c++

The case range of the switch statement in C is used to specify the value or value range that the variable can match. The syntax structure is: case range: // Code block break; It allows the code block to be executed when the variable matches the range, and uses The break statement exits the switch statement.

The switch statement case range in C

In C, the switch statement can be used to perform different executions based on the value of a variable code block. The scope after case is used to specify a specific value or range of values ​​that the variable can match. To specify a range, you need to use the tilde (~), as shown below:

<code class="cpp">switch (variable) {
    case value1 ~ value2:
        // 代码块
        break;
    // ...
}</code>

Syntax structure:

<code>case 范围:
     // 代码块
     break;</code>

Explanation:

• Range: Specified using the tilde (~) to indicate the range that the variable can match.
• Code block: Code that is executed when the variable matches the scope.
• break: Optional end statement, used to exit the switch statement. Without break, the program will continue to execute the following cases.

Example:

<code class="cpp">int number = 5;

switch (number) {
    case 1 ~ 5:
        cout << "数字介于 1 和 5 之间" << endl;
        break;
    case 6:
        cout << "数字是 6" << endl;
        break;
    default:
        cout << "数字大于 6" << endl;
}</code>

Output:

<code>数字介于 1 和 5 之间</code>

In this example, the variable number# The value of ## (5) matches the range 1 ~ 5, so the first code block is executed.

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