Knowledge Walls
Venkatesan
Hyderabad, Andhra Pradesh, India
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Introduction
What is C Identifiers Characters in C Datatypes & Variables Structure of C Program How to install turbo C in windows XP? How to install turbo C in windows 7/8?
Introduction [cont'd]
How to Compile and Run? Header files C Tokens Escape sequence Keywords Storage class specifier Constants
Introduction [cont'd]
Volatile
Operators
Operators Arithmetic Operators Relational operators Logical operators Increment & Decrement Operators Assignment Operators Bitwise operators
Operators [cont'd]
Conditional Operator Sizeof Operator
Input Output Functions
printf Scanf Getch putch getche Putchar getchar
Input Output Functions [cont'd]
gets puts
Decision Statements
If If-Else Else-If Nested If-Else Switch Goto
Looping Statements
For While Do-While Break Continue
Arrays
What is Array? One Dimensional Two Dimensional Multi Dimensional
Strings
What is String? Strlen Strcpy Strcmp Strlwr Strupr Strchr
Strings [cont'd]
Strstr Strcat Strrev
User-defined Functions
What is Functions? Function prototype Defining a Function Simple Arguments Return Value Arguments with Return value
User-defined Functions [cont'd]
Call by value Call by reference Recursion Nesting Functions Arrays as Arguments
Structures and Unions
Define Structure Copying Structures Comparing two Structures Arrays of Structures Nested Structures Structure with Functions Define Union
Structures and Unions [cont'd]
Different between Struct and Union
Pointers
Define Pointers & Operator Operators in pointers Pointers Array Pointers as Function Arguments Functions Returning Pointers Pointers and Structures
Memory
Dynamic Memory Allocation Malloc Calloc Realloc Free
Files
What is Files? Write Files Read Files Append Files Error handling
# Preprocessor
What is preprocessor in C? #include #define #if and #else #elif #ifdef #ifndef
# Preprocessor [cont'd]
#undef
Bitwise operators in Operators of Programming in C
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Bitwise operators 
Bitwise operators are operates the values bit level. Also performs shift left and shift right in the bit level. It is not applicable for float and double. Binary values are performs the operator actionas in bit level.
What is bit level 
All values stores in the memory as binary value. Binary values are 0 and 1. int datatype allocates 2 bytes. 2 bytes is 16 bits. so integer allocates 16 bit memory. For example if value is 14 then binary value is 1110 stores in the memory as below.
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0
Operators and meaning 
Operators Meaning
& Bitwise AND
| Bitwise OR
^ Bitwise exclusive OR
<< Shift the values by bit level left side
>> Shift the values by bit level right side
Program Hints 
a value is 14. 14 equal binary value is 1110. 1110 move to the right side include one more zero at right side then the binary value is 11100. 11100 equal decimal value is 28.
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0
a<<1 shift 1 bit left side
0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0
Program
#include "stdio.h"
void main(){
    int a = 14;
    a = a<<1;
    printf("%d",a);
}
Output 
A = 28
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