C: Switch Statements. Sometimes when creating a C program, you run into a situation in which you want to compare one thing to a number of other things. Let's say, for example, that you took a character from the user and wanted to compare this to a number of characters to perform different actions.

  1. Dev C++ Switch Case Example
  2. Visual C++ Switch Case Example
  3. Dev C++ Example Graphics Programs

จากผังงานรูปที่ 12-2 แสดงการทำงานของคำสั่ง switch ที่ไม่มีคำสั่ง break ทำให้ทราบว่า การทำงานหลังจากตรวจสอบว่าเงื่อนไขที่ 1เป็นจริง จะทำกิจกรรมที่ 1. Hi, I've been having difficulty getting my switch statements to work = properly. When I run the program no matter what I enter I get the = default response.

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Jun 03, 2015 Switch case programming exercises and solutions in C June 3, 2015 Pankaj C programming C, Exercises, Programming, Switch switch case is a branching statement used to perform action based on available choices, instead of making decisions based on conditions. จะเห็นว่าค่าตัวแปรที่ใช้ในการเงื่อนไข จะอยู่หลัง switch และเงื่อนไขจะอยู่หลัง case ส่วนสิ่งที่จะทำหากผลของเงื่อนไขเป็นจริง.

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A switch statement allows a variable to be tested for equality against a list of values. Each value is called a case, and the variable being switched on is checked for each switch case.

Syntax

The syntax for a switch statement in C programming language is as follows −

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Dev C++ Switch Case Example

The following rules apply to a switch statement −

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  • The expression used in a switch statement must have an integral or enumerated type, or be of a class type in which the class has a single conversion function to an integral or enumerated type.

  • You can have any number of case statements within a switch. Each case is followed by the value to be compared to and a colon.

  • The constant-expression for a case must be the same data type as the variable in the switch, and it must be a constant or a literal.

  • When the variable being switched on is equal to a case, the statements following that case will execute until a break statement is reached.

  • When a break statement is reached, the switch terminates, and the flow of control jumps to the next line following the switch statement.

  • Not every case needs to contain a break. If no break appears, the flow of control will fall through to subsequent cases until a break is reached.

  • A switch statement can have an optional default case, which must appear at the end of the switch. The default case can be used for performing a task when none of the cases is true. No break is needed in the default case.

C++C# switch case multiple

Flow Diagram

Visual C++ Switch Case Example

Example

Dev C++ Example Graphics Programs

When the above code is compiled and executed, it produces the following result −