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C program to swap two words/bytes.

This program will swap two bytes/words of an integer number, here this operation is implemented using bitwise shifting and bit masking.

Swapping two Bytes/Words using C program

/* C program to swap bytes/words of integer number.*/

#include <stdio.h>

int main()
{
    unsigned int data = 0x1234;
    printf("\ndata before swapping : %04X", data);

    data = ((data << 8) & 0xff00) | ((data >> 8) & 0x00ff);

    printf("\ndata after swapping  : %04X", data);

    return 0;
}
    data before swapping : 1234
    data after swapping  : 3412

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