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


What Interpreter Means?

Interpreter is also a language translator that translates a source code(.c) into a machine code(.obj). But it converts only one source code instruction to a machine code instruction at a time. Therefore a compiler processes the entire program in one go while interpreter processes one instruction at a time.

Error In Source Code

The interpreter checks for errors in each source code instruction and indicates it to the programmer instantly. Thus clearing errors for a programmer is not that much headache. As interpreter execute the instruction, only after the error in a instruction is corrected. This process continues until the last line of a program is reached.

How Interpreter Works

Interpreter replaces a single statements to a single machine language instruction at a time. A single statement is a line terminated by semicolon. The following diagram clearly demonstrate how interpreter translate source code to a machine code.

How Interpreter Works

Compiler vs Interpreter

Compiler Interpreter
Scans entire program before translating it into object code(machine readable). Translates one instruction at a time.
Slow in debugging. Fast in Debugging.
Execution time is less. Execution time is more.
C, C++ are the best examples which uses compiler. Python, Ruby, Matlab and Perl are the best examples which uses interpreter.

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