C Foundation

What is C? C Compiler Installation C Extensions C Compiler C Interpreter C Program Structure

C Basics

C Keywords C Data Types C Identifiers C Variables C Constant C Escape Sequences C Constant and Volatile C Typecast


What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

Basic IO's

Basic IO's C Formatted Functions C Unformatted Functions C Common Functions

Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement


What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop


What is Function C User Defined Functions C Recursion C Passing Parameters


Scope C Local Scope C Global Scope

Storage Classes

What is Storage Class C Auto C Extern C Static C Register


What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings


What is String C String Functions


What is Pointer C Pointers Arithmetic C Pointer to Pointer C Pointers and Arrays C Pointers and Strings C Pointer to Functions Void Pointers Null Pointers C Null and Void Pointer


What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def


What is Union


What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

Memory Allocation

What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

All ASCII Code Basic C Questions

C Interview

C Interview Sets All Star Patterns All Number Patterns All Alphabet Patterns All Series Patterns
The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

C Compiler

What Compiler Means?

Complier is nothing more than translating one thing to another to do some useful work.

Compiler in C

In C, Compiler is a kind of translator that translate source code (.c) into machine code (.obj). This machine code is used by your computer's microprocessor to do the work as per the command written in source code by the programmer.

Error In Source Code

During translation process the Compiler reads the source code (.c) and checks the syntax errors. If any error, the Compiler generates an error message, which is usually displayed on a screen. In case of any errors a object code will not be created by the Compiler. Until all the errors are rectified.

Where Compiler Resides

The Compiler usually resides on a disk and not in Random Access Memory (RAM).

Does Source Code Actually Needed?

Once the program has been compiled the resulting machine code is saved in an executable file, which can be run on its own at any time. Once the executable file (.obj) is generated there is no need of actual source code file. Execution file (.obj) generation will not affect a source code file (.c).

How Compiler Works

The Compiler replaces all statements with a series of machine language instruction. A single statement is a line terminated by semicolon. The following diagram clearly demonstrate how compiler translate source code to a machine code.


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