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'.
We can use an if-statement to check equality to
'h'
, 'e'
, and 'q'
Adobe audition 1.5 vst plugins. - 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:Compound statements. (A compound statement is a group of statements enclosed by curly braces.) Action The boolean expressions are evaluated in the order of their appearance to determine the first expression that is true. The associated statement is executed, and execution continues with the first statement following the entire if-else-if construct. C Nested if.else. The if.else statement executes two different codes depending upon whether the test expression is true or false. Sometimes, a choice has to be made from more than 2 possibilities. The nested if.else statement allows you to check for multiple test expressions and execute different codes for more than two conditions.
If the if statement was true the else statement will not be checked. It is possible to use numerous else if statements to ensure that only one block of code is executed. Kali ini kita akan belajar percabangan dengan contoh program C untuk IF bersarang (Nested If). Percabangan IF sendiri merupakan sebuah pemilihan statement yang akan dieksekusi berdasarkan suatu kondisi. Kondisi tidak hanya satu saja tapi bisa lebih. Pada kali ini kita akan membahasnya lebih detail dan kompleks dengan contoh program IF bersarang.
C Programming Nested If Statement Example
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: