#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h> 
#include <cstdlib> 
#include <ctime> 
#include <iostream>

int main() {
	char buffer[] = "atomiku!atomiku@host.org";
	char nick[50];
	char ident[50]; 
	char host[50];
	sscanf (buffer,"%s!%s@%s",nick,ident,host);
	printf ("n %s i %s h %s\n", nick, ident, host);
}
Output:

atomiku@atomiku:~/mystuff/code/C++/atobot$ ./hello
n atomiku!atomiku@host.org i@&#65533;h&#65533;&#1343;&#65533;[&#1463;&#65533;&#65533;&#65533;&#65533;&#65533;&#65533;&#65533;&#65533;&#1343;'&#65533;B&#65533; h c&#65533;&#65533;