# Change first and last bits of a number

Here given code implementation process.

``````// C Program
// Change first and last bits of a number
#include <stdio.h>

// Active all the bits of present in a number
int activeAllBits(int num)
{
int n = num;
n = n | n >> 1;
n = n | n >> 2;
n = n | n >> 4;
n = n | n >> 8;
n = n | n >> 16;
return n;
}
// Change the first and last bits of given number
void changeFirstLast(int num)
{
int n = 0;
if (num > 1)
{
n = activeAllBits(num);
// Change first and last bits
n = num ^ ((n + 1) >> 1) + 1;
}
// Display calculated result
printf(" Number : %d", num);
printf("\n After Active : %d\n", n);
}
int main()
{
// (16) 10000 => 00001 (1)
changeFirstLast(16);
// (45) 101101 => 001100 (12)
changeFirstLast(45);
// (100) 1100100 => (37)   0100101
changeFirstLast(100);
return 0;
}``````

#### Output

`````` Number : 16
After Active : 1
Number : 45
After Active : 12
Number : 100
After Active : 37``````
``````/*
Java Program for
Change first and last bits of a number
*/
public class SwitchBits
{
// Active all the bits of present in a number
public int activeAllBits(int num)
{
int n = num;
n = n | n >> 1;
n = n | n >> 2;
n = n | n >> 4;
n = n | n >> 8;
n = n | n >> 16;
return n;
}
// Change the first and last bits of given number
public void changeFirstLast(int num)
{
int n = 0;
if (num > 1)
{
n = activeAllBits(num);
// Change first and last bits
n = num ^ ((n + 1) >> 1) + 1;
}
// Display calculated result
System.out.print(" Number : " + num);
System.out.print("\n After Active : " + n + "\n");
}
public static void main(String[] args)
{
// (16) 10000 => 00001 (1)
// (45) 101101 => 001100 (12)
// (100) 1100100 => (37)   0100101
}
}``````

#### Output

`````` Number : 16
After Active : 1
Number : 45
After Active : 12
Number : 100
After Active : 37``````
``````// Include header file
#include <iostream>

using namespace std;
/*
C++ Program for
Change first and last bits of a number
*/
class SwitchBits
{
public:
// Active all the bits of present in a number
int activeAllBits(int num)
{
int n = num;
n = n | n >> 1;
n = n | n >> 2;
n = n | n >> 4;
n = n | n >> 8;
n = n | n >> 16;
return n;
}
// Change the first and last bits of given number
void changeFirstLast(int num)
{
int n = 0;
if (num > 1)
{
n = this->activeAllBits(num);
// Change first and last bits
n = num ^ ((n + 1) >> 1) + 1;
}
// Display calculated result
cout << " Number : " << num;
cout << "\n After Active : " << n << "\n";
}
};
int main()
{
// (16) 10000 => 00001 (1)
// (45) 101101 => 001100 (12)
// (100) 1100100 => (37)   0100101
return 0;
}``````

#### Output

`````` Number : 16
After Active : 1
Number : 45
After Active : 12
Number : 100
After Active : 37``````
``````// Include namespace system
using System;
/*
C# Program for
Change first and last bits of a number
*/
public class SwitchBits
{
// Active all the bits of present in a number
public int activeAllBits(int num)
{
int n = num;
n = n | n >> 1;
n = n | n >> 2;
n = n | n >> 4;
n = n | n >> 8;
n = n | n >> 16;
return n;
}
// Change the first and last bits of given number
public void changeFirstLast(int num)
{
int n = 0;
if (num > 1)
{
n = activeAllBits(num);
// Change first and last bits
n = num ^ ((n + 1) >> 1) + 1;
}
// Display calculated result
Console.Write(" Number : " + num);
Console.Write("\n After Active : " + n + "\n");
}
public static void Main(String[] args)
{
// (16) 10000 => 00001 (1)
// (45) 101101 => 001100 (12)
// (100) 1100100 => (37)   0100101
}
}``````

#### Output

`````` Number : 16
After Active : 1
Number : 45
After Active : 12
Number : 100
After Active : 37``````
``````<?php
/*
Php Program for
Change first and last bits of a number
*/
class SwitchBits
{
// Active all the bits of present in a number
public	function activeAllBits(\$num)
{
\$n = \$num;
\$n = \$n | \$n >> 1;
\$n = \$n | \$n >> 2;
\$n = \$n | \$n >> 4;
\$n = \$n | \$n >> 8;
\$n = \$n | \$n >> 16;
return \$n;
}
// Change the first and last bits of given number
public	function changeFirstLast(\$num)
{
\$n = 0;
if (\$num > 1)
{
\$n = \$this->activeAllBits(\$num);
// Change first and last bits
\$n = \$num ^ ((\$n + 1) >> 1) + 1;
}
// Display calculated result
echo " Number : ". \$num;
echo "\n After Active : ". \$n ."\n";
}
}

function main()
{
// (16) 10000 => 00001 (1)
// (45) 101101 => 001100 (12)
// (100) 1100100 => (37)   0100101
}
main();``````

#### Output

`````` Number : 16
After Active : 1
Number : 45
After Active : 12
Number : 100
After Active : 37``````
``````/*
Node Js Program for
Change first and last bits of a number
*/
class SwitchBits
{
// Active all the bits of present in a number
activeAllBits(num)
{
var n = num;
n = n | n >> 1;
n = n | n >> 2;
n = n | n >> 4;
n = n | n >> 8;
n = n | n >> 16;
return n;
}
// Change the first and last bits of given number
changeFirstLast(num)
{
var n = 0;
if (num > 1)
{
n = this.activeAllBits(num);
// Change first and last bits
n = num ^ ((n + 1) >> 1) + 1;
}
// Display calculated result
process.stdout.write(" Number : " + num);
process.stdout.write("\n After Active : " + n + "\n");
}
}

function main()
{
// (16) 10000 => 00001 (1)
// (45) 101101 => 001100 (12)
// (100) 1100100 => (37)   0100101
}
main();``````

#### Output

`````` Number : 16
After Active : 1
Number : 45
After Active : 12
Number : 100
After Active : 37``````
``````#   Python 3 Program for
#   Change first and last bits of a number

class SwitchBits :
#  Active all the bits of present in a number
def activeAllBits(self, num) :
n = num
n = n | n >> 1
n = n | n >> 2
n = n | n >> 4
n = n | n >> 8
n = n | n >> 16
return n

#  Change the first and last bits of given number
def changeFirstLast(self, num) :
n = 0
if (num > 1) :
n = self.activeAllBits(num)
#  Change first and last bits
n = num ^ ((n + 1) >> 1) + 1

#  Display calculated result
print(" Number : ", num, end = "")
print("\n After Active : ", n )

def main() :
#  (16) 10000 => 00001 (1)
#  (45) 101101 => 001100 (12)
#  (100) 1100100 => (37)   0100101

if __name__ == "__main__": main()``````

#### Output

`````` Number :  16
After Active :  1
Number :  45
After Active :  12
Number :  100
After Active :  37``````
``````#   Ruby Program for
#   Change first and last bits of a number

class SwitchBits
#  Active all the bits of present in a number
def activeAllBits(num)
n = num
n = n | n >> 1
n = n | n >> 2
n = n | n >> 4
n = n | n >> 8
n = n | n >> 16
return n
end

#  Change the first and last bits of given number
def changeFirstLast(num)
n = 0
if (num > 1)
n = self.activeAllBits(num)
#  Change first and last bits
n = num ^ ((n + 1) >> 1) + 1
end

#  Display calculated result
print(" Number : ", num)
print("\n After Active : ", n ,"\n")
end

end

def main()
#  (16) 10000 => 00001 (1)
#  (45) 101101 => 001100 (12)
#  (100) 1100100 => (37)   0100101
end

main()``````

#### Output

`````` Number : 16
After Active : 1
Number : 45
After Active : 12
Number : 100
After Active : 37
``````
``````/*
Scala Program for
Change first and last bits of a number
*/
class SwitchBits
{
// Active all the bits of present in a number
def activeAllBits(num: Int): Int = {
var n: Int = num;
n = n | n >> 1;
n = n | n >> 2;
n = n | n >> 4;
n = n | n >> 8;
n = n | n >> 16;
return n;
}
// Change the first and last bits of given number
def changeFirstLast(num: Int): Unit = {
var n: Int = 0;
if (num > 1)
{
n = this.activeAllBits(num);
// Change first and last bits
n = num ^ ((n + 1) >> 1) + 1;
}
// Display calculated result
print(" Number : " + num);
print("\n After Active : " + n + "\n");
}
}
object Main
{
def main(args: Array[String]): Unit = {
var task: SwitchBits = new SwitchBits();
// (16) 10000 => 00001 (1)
// (45) 101101 => 001100 (12)
// (100) 1100100 => (37)   0100101
}
}``````

#### Output

`````` Number : 16
After Active : 1
Number : 45
After Active : 12
Number : 100
After Active : 37``````
``````/*
Swift 4 Program for
Change first and last bits of a number
*/
class SwitchBits
{
// Active all the bits of present in a number
func activeAllBits(_ num: Int)->Int
{
var n: Int = num;
n = n | n >> 1;
n = n | n >> 2;
n = n | n >> 4;
n = n | n >> 8;
n = n | n >> 16;
return n;
}
// Change the first and last bits of given number
func changeFirstLast(_ num: Int)
{
var n: Int = 0;
if (num > 1)
{
n = self.activeAllBits(num);
// Change first and last bits
n = num ^ ((n + 1) >> 1) + 1;
}
// Display calculated result
print(" Number : ", num, terminator: "");
print("\n After Active : ", n );
}
}
func main()
{
// (16) 10000 => 00001 (1)
// (45) 101101 => 001100 (12)
// (100) 1100100 => (37)   0100101
}
main();``````

#### Output

`````` Number :  16
After Active :  1
Number :  45
After Active :  14
Number :  100
After Active :  37``````
``````/*
Kotlin Program for
Change first and last bits of a number
*/
class SwitchBits
{
// Active all the bits of present in a number
fun activeAllBits(num: Int): Int
{
var n: Int = num;
n = n or (n shr 1);
n = n or (n shr 2);
n = n or (n shr 4);
n = n or (n shr 8);
n = n or (n shr 16);
return n;
}
// Change the first and last bits of given number
fun changeFirstLast(num: Int): Unit
{
var n: Int = 0;
if (num > 1)
{
n = this.activeAllBits(num);
// Change first and last bits
n = num xor((n + 1) shr 1) + 1;
}
// Display calculated result
print(" Number : " + num);
print("\n After Active : " + n + "\n");
}
}
fun main(args: Array < String > ): Unit
{
// (16) 10000 => 00001 (1)
// (45) 101101 => 001100 (12)
// (100) 1100100 => (37)   0100101
}``````

#### Output

`````` Number : 16
After Active : 1
Number : 45
After Active : 12
Number : 100
After Active : 37``````

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