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 File Handling Functions

C provides many functions to access a file in convenient way.

Functions Description
fopen() to open a file
fprintf() to write a sequence of characters to the file
fputc() to write a single character to the file
fputs() to write a string to the file without format specifier
fscanf() to read a sequence of alphanumeric characters from a file
fgetc() to read a single character from the file
fgets() to read a string from a file without format specifier
fwrite() to write a entire structure to a file
fread() to read a entire structure from a file
feof() to test whether the pointer reaches the end of a file
ftell() returns the current position of the file pointer
fseek() to set the file pointer on the stream
ferror() used to detect the error when file read or write operation
fclose() to close one opened file at a time
fcloseall() to close one or more opened file

Writing Data - File Functions

The functions fprintf(), fputc(), fputs() are used to write a single or sequence of characters, integers, floats, etc.

Reading Data - File Functions

The functions fscanf(), fgets(), fgetc() are used to read single or sequence of characters from the file.

Open or Close - File Functions

The functions fopen() function is used to open a file with specific mode. The functions fclose() and fcloseall() is used to close one or more file.

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