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C program to swap two nibbles of a byte.
This program will swap two nibbles of a byte, as we know that one byte has 8 bits or 2 nibbles. Hence one nibble has 4 bits, by shifting 4, 4 bits we can swap nibbles of a byte.
Swapping nibbles of a byte using C program
/*C program to swap two nibbles of a given byte*/
#include <stdio.h>
/* 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;
printf("Enter an integer number (One byte number):");
scanf("%u",&number);
revNumber=swapTwoNibbles(number);
printf("\nEntered Number was : %u \nNumber after swapping nibbles : %u",number,revNumber);
return 0;
}
Enter an integer number (One byte number):200
Entered Number was : 200
Number after swapping nibbles : 140
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