Fundamental concept of Problem solving
Problem solving strategies
Program design & implementation
Introduction to C
Introduction to C
How to open C program code window
Description of C code window
Editing File
Saving and Running a program
The components of C language
Structure of C Program
A sample of C language program
C character set and keywords
C character set and keywords
The C character set
Key words
Data Types
Data Types
Primary Data Type
Secondary Data Type
Rules for constructing variables names
Variable declaration
Assigning values to variables
Scope of variables: Local & Global
Character constants
Integer constants
Real constants
Logical & String constants
C instruction set
Type Declaration & Input/Output Instructions
Arithmetic Instructions
Control Instructions
Arithmetic operators
Relational operators
Logical operators
Increment & Decrement operators
Bitwise operators
Conditional & ternary operators
The comma operators
Size of operator
Assignment operator
Type modifier
Evaluation of expression
Automatic type conversion
Basic Input/Output
Console I/O function
Disc & Port I/O function
Control Structures
Sequence control statements
Decision control & conditional statements
Case control statements
Repitition & loop control statements
Some more statements
Array and String
Introduction of Array
Array Declaration
Array Initialization
Two Dimensional Array
Multi Dimensional Array
Function and Recursion
Function Definition
Function Declaration
Function Call
Pointer expression
Pointer & functions
Pointer & Array
Multi Dimensional Arrays & Pointer
Arrays of Pointer
Use of Pointer & functions
Giving values to member
Structure Initialization
Comparison of structure variables
Arrays of structures
Arrays within structures
Structures within structures
Passing structure to function
Accessing a union member
Initialization of Union variable
Uses of Union
Dynamic Data Structure
Linked list
Data File Handling through C
File operation
Opening & closing a data file
Creating a data file
Processing a data file
Unformatted data file
C Preprocessor & Macro
Macro substitution directives
File inclusion
Compiler control directive
Command line parameter of C
Command line parameter
Header file
Header file
Use of library functions
Some Useful library functions

Header file

Some Useful library functions

There is a vast collections of function .Some of them are grouped together and listed below.
String Function:
 strcpy copies one string into another.
 strcat appends one string to another.
 strcmp compare one string to another.
 strcmpi compare one string to another without case sensitive.
 strlen calculates the length of a string.
 strrev reserve a string.
Mathematical Function:
 abs returns absolute value of an integer.
 sin calculate the sine.
 cos calculate the arc cos.
 tan calculate the arc tangent.
 acos calculate the arc cosine.
 asin calculate the arc sine.
 atan calculate the arc tangent.
 ceil rounds up.
 floor rounds down.
 log calculate the natural logarithm of x.
 pow calculate x to the power of y.
 sqrt calculate the positive square root of input value.
Date & Time  Function:
 asctime converts date and time to ASCII.
 clock determine process time.
 getdate gets system date
 gettime gets system time.
 setdate sets DOS date
 settime sets system time.
 time gets time of day.
Utility Function:
 abort() abnormally terminates a process.
 bsearch() binary search of an array.
 tolower() translate character to lower case.
 toupper() translate character to upper case.
 qsort() sorting using the quick sort algorithm.
 exit() terminate execution of a program.
 free() frees allocated block.
Character Class Test Functions:
 isupper() check and returns non-zero if c is an upper case letter (A-Z).
 islower() check and returns non-zero if c is a lower case letter (a-z).
 isspace() check and returns non-zero if c is a space tab, carriage return, newline, vertical tab, form feed etc.
 isascii() tests whether a character is an ASCII (0 to 127) character.
 isalpha() check and returns non-zero if c is a letter (A-Z or a-z).
 iscntrl() tests whether a character is a control character.
 toascii() translate character to ASCII format.
 tolower() translate character to upper case.