Bitwise Operators: Exact Size Integer Types, Logical Bitwise Operators, Shift Operators

1. By
Y N D ARAVIND
Associate Professor, Dept Of CSE
Newton’s Group Of Institutions, Macherla
@2020 Presented By Mr.Y N D Aravind 1

2. Part- I
Exact Size Integer Types
Logical Bitwise Operators
Shift Operators
@2020 Presented By Mr.Y N D Aravind 2

3. Exact Size Integer Types
 The integer can be of two types – Unsigned integers and
signed integers.
 They can be of four types –short int, int, long int, long
long int.
 As integer is one of the datatype it is built in so it is
machine dependent.
 The size of int may be 4 bytes on computer and on
another it is 2 bytes.
 In other applications we need to fix the size of integers.
 C allows us to define integer types of sizes 8 bits, 16 bits,
32 bits and 64 bits.
 They are defined in stdint.h header file.
Presented By Mr.Y N D Aravind
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4. Exact Size Integer Types
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5. Bitwise operators are used for manipulation of data at bit level.
Operator Meaning
& Bitwise AND.
| Bitwise OR.
^ Bitwise Exclusive OR.
<< Shift left.
>> shift right.
~ One’s complement.
These bits are used to test the bits, or shifting them right to left.
These operators may not be applied to float or double.
These operators are works on integers and characters.
Presented By Mr.Y N D Aravind
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6. Bits are numbered from zero onwards increasing
order from right to left.
15 14 13 12 11 10 9 8 7 6
5 4 3 2 1 0
16-bit integer
7 6 5 4 3 2 1 0
8- bit integer
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7. The truth table for Bitwise AND is
A B A & B
0 0 0
0 1 0
1 0 0
1 1 1
Program:- Write a program to use bitwise AND operator between two integer.
Source code:-
#include <stdio.h>
main()
{
int a,b;
printf(“n Enter a, b values”);
scanf(“%d %d”,&a,&b);
printf(“n After bitwise AND is %d ”,a&b);
}
Presented By Mr.Y N D Aravind
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8. Enter a, b values 3 2
After bitwise AND is 2
To perform Bitwise AND operator:-
a=3
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
b=2
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
a & b
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
a & b =2
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0

9. The truth table for Bitwise OR is
A B A | B
0 0 0
0 1 1
1 0 1
1 1 1
Program:- Write a program to use bitwise OR operator between two integer.
Source code:-
#include <stdio.h>
main()
{
int a,b;
printf(“n Enter a, b values”);
scanf(“%d %d”,&a,&b);
printf(“n After bitwise OR is %d”,a|b);
}
Presented By Mr.Y N D Aravind
9

10. Enter a, b values 3 2
After bitwise OR is 3
To perform Bitwise OR operator:-
a=3
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
b=2
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
a | b
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
a | b =3
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1

11. The truth table for Bitwise EXCLUSIVE OR is
A B A ^ B
0 0 0
0 1 1
1 0 1
1 1 0
Program:- Write a program to use bitwise Exclusive OR operator between two
integer.
Source code:-
#include <stdio.h>
main()
{
int a,b;
printf(“n Enter a, b values”);
scanf(“%d %d”,&a,&b);
printf(“n After bitwise ECLUSIVE OR is %d”,a ^ b);
}
Presented By Mr.Y N D Aravind
11

12. Enter a, b values 3 2
After bitwise Exclusive OR is 1
To perform Bitwise Exclusive OR operator:-
a=3
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
b=2
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
a ^ b
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
a ^ b =1
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1

13. The one‟s complement operator is a unary operator that
requires one operand only. It complements the bits in the
operand. That means it finds the reverse of the operand bit.
The result of the operand is 1 if the original bit is 0 and it is 0
if the original bit is 1. The truth table for one‟s complement
operator is shown below:
Presented By Mr.Y N D Aravind
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14. Write a program to shift inputted data by two bits right..
Source code:-
#include <stdio.h>
main()
{
int x,y;
printf(“n Enter x value”);
scanf(“%d”,&x);
x>>=2;
y=x;
printf(“n The right shifted data is =%d”,y);
} Presented By Mr.Y N D Aravind
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15. Enter x value 8
The right shifted data is = 2
To perform Right shift operator:-
x=8
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Right shift 2 bits
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
y = 2
Presented By Mr.Y N D Aravind
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0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0

16. Write a program to shift inputted data by three bits left.
Source code:-
#include <stdio.h>
main()
{
int x,y;
printf(“n Enter x value”);
scanf(“%d”,&x);
X<<=3;
y=x;
printf(“n The left shifted data is =%d”,y);
}
Presented By Mr.Y N D Aravind
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17. Enter x value 2
The left shifted data is = 16
To perform Left shift operator:-
x=2
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Right shift 2 bits
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
y = 16
Presented By Mr.Y N D Aravind
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0

18. Presented By Mr.Y N D Aravind
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