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Program Discussion :: Bitwise Operator
Home > Programs > Bitwise Operator

17. Write an efficient program to swap the nibbles in a byte

Answer:

#include <stdio.h>
#include<iostream>
using namespace std;
/* function : swapTwoNibbles, to swap two nibbles of a given byte.*/
unsigned char swapTwoNibbles(unsigned char n)
{
    unsigned char num;
    num= ( (n & 0x0F)<<4 | (n & 0xF0)>>4 );
    return num;

int main()
{
    unsigned char number;
    unsigned char revNumber;
      cout<<"Enter an integer number (One byte number):";
      cin>>number;
    revNumber=swapTwoNibbles(number);
    cout<<"\nEntered Number was : %u \nNumber after swapping nibbles : %u",number,revNumber;

    return 0;
}

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