- Dev C++ Switch Statement Examples
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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. For now, let's just say that you have three commands which operate from the keys: 'h', 'e', and 'q'.
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. C – switch case statement in C Programming with example By Chaitanya Singh Filed Under: c-programming The switch case statement is used when we have multiple options and we need to perform a different task for each option. Switch statement in C. When you want to solve multiple option type problems, for example: Menu like program, where one value is associated with each option and you need to choose only one at a time, then, switch statement is used. Switch statement is a control statement that allows us to choose only one choice among the many given choices. Dev-c++ wont open.
We can use an if-statement to check equality to
'h'
, 'e'
, and 'q'
- remember that we use single quotes because we're dealing with chars, not strings. So let's just write the code in the way we're used to (and let's wrap a while loop around it so it keeps getting a character and acting upon what it was, because that makes our program slightly better and easier to test), using if-statements, like the following:But I do not want to give the impression that I was the first and only one who had the idea of using a map to implement switch on strings in C. About the Author Stefan is Principal Developer at NEW LINE Software Development GmbH in Germany, focused on the development of Windows DNA and Microsoft.NET Web applications. C Program to Calculate Grade of Student Using Switch Case In this C program, we will calculate the grade of a student based on the total marks obtained by the student in five subjects. Here we will use a switch case statement, however you can write same program using if-else ladder statement also.
This program should be something you're comfortable with creating by this point, however your programmer instincts should also be kicking in and telling you that you shouldn't be repeating so much code here. One of the core principles of object orientated programming is DRY: Don't Repeat Yourself. In this program we're having to repeat a lot of code for the 'else if's including using
ch
every time we're doing a comparison.The solution to this 'problem' is what this tutorial is all about: switch statements. These are essentially just a really nice way to compare one expression to a bunch of different things. They are started via the
switch
keyword, and from there comparisons are made using a case:
syntax. It isn't easily described in words, so take a look at the syntax below:The different
case
s essentially act as many if/else-ifs in a chain, and an 'else' type clause can be specified by using default
:This type of functionality should be reasonably easy to understand with if-statements securely under your belt, and so if you're feeling brave - try porting the basic program we created at the start of this tutorial to use if-statements. If you're not quite that brave, the cleaner and neater
switch
version of the code is below:Dev C++ Switch Statement Examples
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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 case.
Syntax
The syntax for a switch statement in C++ is as follows −
The following rules apply to a switch statement −
- 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. https://intensivepodcast.weebly.com/refx-nexus-vst-plugin-free-download-zip.html.
- 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. Nexus air 2 vst plugin free download 1.
- 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
This would produce the following result −
cpp_decision_making.htm