C language swap() function: swap bytes from source and destination areas

Function name : swap

Header file : <stdlib.h>

Function prototype : void swab(char *from,char *to,int n);

Function : Swap bytes from source and destination areas

Parameters : char *from and char *to are the strings to be exchanged

int n is the number of bytes to be exchanged

Return value : No return value

Program example : Use this function to exchange the string ww.wodctppc.mo into www.dotcpp.com.

 #include<stdio.h>#include<stdlib.h>#include<string.h>#include<time.h>intmain(void){charsuc[20]={ww.wodctppc.mo};chardes[20] ;swab(suc,des,strlen(suc));printf(Thisisdest:%sn,des);return0;}

Running results

 Thisisdest:www.dotcpp.com