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iOS App Design: Intro to C

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Statement terminator- each statement must end with a semicolon
space ignored by the compiler
Data types
Extensive system used for declaring variables or functions of different types. The type of a
Enumerated types
arithmetic types and they are used to define variables that can only be assigned certain
Void Type
The type specifier void indicates that no value is available.
Derived Type
(a) Pointer types, (b) Array types, (c) Structure types, (d) Union types and (e) Function types.
Variable Type
They are char, int, float, double and void
Variable Declaration
A line of programming code that alerts the operating system that the program needs to
Lvalues & Rvalues
Lvalue : An expression that is an lvalue may appear as either the left-hand or right-hand
General - purpose, high level development language
Text Editor
(computer science) an application that can be used to create and view and edit text files. C files
A highly specialized piece of software that takes a programming language understandable by humans
Preprocessor Commands
begin with a pound sign (#) and perform some action before the compiler translates the
Group of statements that together perform a task. Every C program has at least one function, which
Name given to a storage area that our programs can manipulate
Statements & Expressions
Whats being expressed
Texted ignored by the compiler. For human organization
either a keyword, an identifier, a constant, a string literal, or a symbol.
identifier is a name used to identify a variable, function, or any other user-defined item. An
The constants refer to fixed values that the program may not alter during its execution. These
String literals
Represents a sequence of characters.
Objects that carry out a certain function
Basic Type
arithmetic types and consists of the two types: (a) integer types and (b) floating-point types.
Integer Type
any positive or negative number without a decimal point [1, 2, 3]
Special set of "reserved" words. Can't be used in any other manner.
arithmetic operators
+ adds two operands
relational operators
== Checks if the values of two operands are equal or not, if yes then condition becomes
logical operators
&& Called Logical AND operator. If both the operands are non-zero, then condition becomes
assignment operators
= Simple assignment operator, Assigns values from right side operands to left side operand
Order of operation with operators
Statement that calls for the execution of a statement a multiple number of times, includes for, while, do
return type
the data type of the value a function returns
function name
the name of the function
a placeholder that receives a value with the function is called
function body
contains a collection of statements that define what the function does
local variables
Variables that are declared inside a function and can only be accessed by statements that are
global variables
Variables that are declared outside the functions, usually at the top of the program and
A data structure which can store a fixed size sequential collection of elements of the *same type*
a statement used to list the elements in an array
Used to access the specific elements of an array by number
variable, whose value is the address of another variable, i.e., direct address of the memory
Symbol often denoting a 'pointer'
Symbol that indicates the address of a variable
one-dimensional array of characters which is terminated by a null character '\0'.
User defined data type that can hold data items or variables of different kinds, members are
A special data type that enables user to store different data types in the same memory location; only one
type casting
way to convert a variable from one data type to another data type
memory management
Use of functions to allocate, reallocate and free memory
Organized data management
Unorganized data management