Programming and Data Structures

54 Programming and Data Structures

3.16 Write a program to display 1 if inputed number is except 100 otherwise 0. Use the

logical NOT operator (!).

xnain()

{

in t x,z;

c l r s c r () ;

printf ("Enter number:");

scanf ("%d", &cx);

z=(xl=100 ? 1 : 0);

printf ("d :%d", z);

}

OUTPUT : Enter number : 100

d : 0

Enter number: 10

d : 1

Explanation In the above program ! NOT operator is used with the conditional operator. The

value of x is entered. Here, if the value of x is other than 100 then 1 is assigned to z otherwise 0.

3.7 BITWISE OPERATORS

C supports a set of bitwise operators as listed in the Table 3.6. C supports six bit operators. These

operators can operate only on an integer operands such as i n t , ch a r, sh o r t/ long in t etc.

Table 3.6 Bitwise operators

Operator

Meaning

>>

Right shift

<<

Left shift

A

Bitwise xor (Exclusive OR)

-

One's complement

&

Bitwise AND

1

Bitwise OR

3.17 Write a program to shift inputed data by two bits right.

m ain()

{

in t x»y ;

c l r s c r ( ) ;

printf ("Read The Integer from keyboard (x)

Operators and Expressions 55

scanf ("%d", &x);

x » = 2 ;

printf ("The Right shifted data is = %d",y);

i

OUTPUT: Read The Integer from keyboard (x) 8

The Right shifted data is a 2

Before the execution of the program: - The number entered through the keyboard is 8 and its

corresponding binary number is 1 0 0 0.

0 0 0 0 0000 00

00 10 00

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 0

After execution of the program: - as per the above program the inputed data x is to be shifted by 2

bits right side. The answer in binary bits would be as follows.

0 0 0 0 0 0 0 0 0 0

0 0

0 0 1

0

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 0

Shifting two bits right means the inputted number is to be divided by 2s where s is number of shifts

i.e. in short y=n/2*

Where, n = Number

a = Number of position to be shifted.

As per the program as cited above

Y= 8/22 = 2 .

Similarly, a program for shifting to the left can be written as follows.

3.18 Write a program to shift inputed data by two bits left.

mainO

{

int x,y;

c lr s c r ();

printf ("Read The Integer from keyboard (x)

scanf ("%d”, &x);

x « = 3 ;

y=x;

printf ("The Bight shifted data is = %d",y);

i

OUTPUT : Read The Integer from keyboard (x)2

The Left shifted data is = 16

56 Programming and Data Structures

Before execution of the program: - The number entered through the keyboard is 2 and its

corresponding binary number is 1 0. The bits will be as follows.

00000000 00 00

00 10

15 14 13 12 11 10 09 08 07 06

05

04

03

02 01 0

After execution of the program: - As per the above program the

bits left side. The answer in binary bits would be as follows.

inputed data x is to be shifted by 3

00000000 00

01

00 0 0

15 14 13 12 11 10 09 08 07 06

05

04

03

02 01 0

The corresponding decimal number is 16 i.e. answer should be 16.

Shifting three bits left means number is multiplied by 8 in short y=n*2s

Where n = Number

s = Number of position to be shifted.

As per the program as cited above

Y=2*23 = 16.

3.19 Write a program to use bitwise AND operator between the two integers and display the

results.

m&in()

{

in t a,b,c;

c l r s c r ( ) ;

printf ("Read The Integers from keyboard (a & b)

scanf ("%d %d", &a,&b);

c-a & b;

printf ("The Answer after ANDing is (C)= %d",c);

I

OUTPUT:

Read The Integers from keyboard (a & b ): 8 4

The Answer after ANDing is (C) = 0

a=8

0000 0 00 0 0 0 001000

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 0

Before execution

0000 0 00 0 0 0 000100

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 0