**EX:**

**write a C program to perform**

**Compliment**operation of two intiger's. How to write a C program to perform

**Compliment**operation of two intiger's. C program to perform

**Compliment**operation of two intiger's.

**Input from user:**

a=25;

**Expected Output:**

**After performing Compliment operation the output is: 230**

**Logic to perform Compliment operation of two intiger's:**

**Firstly you need to know how work Compliment operator.**

- It sets bit value
**1**only if corresponding bit of operand is**0**. Means it changes**1**value to**0**and**0**value to**1**.

1. We take one intiger numbers a=25.

2. Binary representation of

**a -Compliment**is-a = 0001 1001

------------------------------------

a~ = 1110 0110

**=230 in decimal.**3. After performing

__Compliment (~),__

**8**bit binary representation is 1110 0110 which is

**230**in decimal.

But output is not 230. The output of the Program is

**-26**.

To understand this you need to know how work's

**2's**compliment.

__2's compliment:__

**n**, bitwise Complement of n is

**-(n+1)**.

Means 2's compliment of a number is equal to the compliment of that number plus 1.

**For Example:**

We take

**230**.

**8**bit binary representation of 230 is 1110 0110 so 2's compliment of that number is... -(0001 1001)

-0001 1001

+ 1

--------------------

-0001 1010=-26(in decimal)

The bitwise Complement of

**25**is**230**in decimal. The**2's**compliment of**230**is**-26**. Hence, the output is**-26**__not__**230**.**Program:**

void main()

{

int a=25;

printf("Output is:%d",~a);

}

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