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Switch Statement C++ With Numbers
Switch Case In Dev C++

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I am making a program where the user has to input text, and the program outputs the appropriate string. I made this program using if else statement, but professor said not to use if and else. So I want to know if I can use the switch statement. I know that switch statement work for.
If c is a lowercase a, lettera is incremented and the break statement terminates the switch statement body. If c is not an a or A, the default statement is executed. Visual Studio 2017 and later: (available with /std:c17) The fallthrough attribute is specified in the C17 standard. It can be used in a switch statement as a hint to the.

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 −

The following rules apply to a switch statement −

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.

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.

Flow Diagram

Example

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

-->

Allows selection among multiple sections of code, depending on the value of an integral expression.

Syntax

switch ( [initialization;] expression)
{
caseconstant-expression:statement
[default :statement]
}

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Remarks

The expression must have an integral type, or be a class type that has an unambiguous conversion to integral type. Integral promotion takes place as described in Standard conversions.

The switch statement body consists of a series of case labels and an optional default label. Collectively, the statements that follow the labels are called labeled statements. The labeled statements aren't syntactic requirements, but the switch statement is meaningless without them. No two constant expressions in case statements may evaluate to the same value. The default label may appear only once. The default statement is often placed at the end, but it can appear anywhere in the body of the switch statement. A case or default label can only appear inside a switch statement.

The constant-expression in each case label is converted to the type of expression. Then, it's compared with expression for equality. Control passes to the statement whose caseconstant-expression matches the value of expression. The resulting behavior is shown in the following table.

Switch statement behavior

Condition	Action
Converted value matches that of the promoted controlling expression.	Control is transferred to the statement following that label.
None of the constants match the constants in the case labels; a default label is present.	Control is transferred to the default label.
None of the constants match the constants in the case labels; no default label is present.	Control is transferred to the statement after the switch statement.

Switch Statement C++ With Numbers

If a matching expression is found, execution can continue through later case or default labels. The break statement is used to stop execution and transfer control to the statement after the switch statement. Without a break statement, every statement from the matched case label to the end of the switch, including the default, is executed. For example:

How to make switch statement in dev c 2017

In the above example, uppercase_A is incremented if c is an uppercase 'A'. The break statement after uppercase_A++ terminates execution of the switch statement body and control passes to the while loop. Without the break statement, execution would 'fall through' to the next labeled statement, so that lowercase_a and other would also be incremented. A similar purpose is served by the break statement for case 'a'. If c is a lowercase 'a', lowercase_a is incremented and the break statement terminates the switch statement body. If c isn't an 'a' or 'A', the default statement is executed.

Visual Studio 2017 and later: (available with /std:c++17) The [[fallthrough]] attribute is specified in the C++17 standard. You can use it in a switch statement. It's a hint to the compiler, or anyone who reads the code, that fall-through behavior is intentional. The Microsoft C++ compiler currently doesn't warn on fallthrough behavior, so this attribute has no effect on compiler behavior. I

How To Make Switch Statement In Dev C++