Syntax

#include <stdlib.h>
void swab(char *source, char *destination, int n);

swab copies n bytes from source, swaps each pair of adjacent bytes, and stores the result at destination. The integer n should be an even number to allow for swapping. If n is an odd number, a null character (\0) is added after the last byte.

swab is typically used to prepare binary data for transfer to a machine that uses a different byte order.

Note: In earlier releases of C Set ++, swab began with an underscore (_swab). Because it is defined by the X/Open standard, the underscore has been removed. For compatibility, The Developer's Toolkit will map _swab to swab for you.

There is no return value.

This example copies n bytes from one location to another, swapping each pair of adjacent bytes:

#include <stdlib.h>
#include <stdio.h>

int main(void)
{
   char from[20] = "hTsii  s atsirgn..x ";
   char to[20];

   swab(from, to, 19);  /* swap bytes */
   printf("%s\n", to);

   return 0;

   /****************************************************************************
      The output should be:

      This is a string..
   ****************************************************************************/
}

• fgetc
  
• fputc

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