#if USE_MUX

PUBLIC int do_mux(m_ptr)
message *m_ptr;
{
	int num;
	
	num = m_ptr->m1_i1; /* num takes the value of m1_i1 of passed message structure */
						/* in which m_ptr points to */
	return num * 4260; /* return the mux of given number x AM number */
}

#endif /* USE_MUX */

#include <lib.h>
#include <minix/com.h>
#include <stdio.h>
#include <stdlib.h>
#include <minix/syslib.h>

int my_mux(int num)
{
	message m; /* creates the message structure which will pass to kernel call do_mux */
	
	m.m1_i1 = num; /* stores the value of num into an integer member of message structure m */
					/* in order to pass its value into the kernel call */
	return (_taskcall(SYSTASK, SYS_MUX, &m)); /* invokes do_mux kernel call */
}

int main(int argc, char *argv[2])
{
	int number = atoi(argv[1]); /* converts the second argument passed into its integer representation */
	
	printf("\n%d*4260 = %d\n", number, my_mux(number)); /* prints the mux of the given number x 4260 calculated by the kernel call do_mux */
	
	return 0; /* terminates */
}