C programming for shutdown window

#include <stdio.h>
#include <stdlib.h>
main ()
{
char ch ;
printf ("Do you want to shutdown your computer now (y/n) \n ");
scanf ( "%c" ,&ch);
if ( ch =='y' || ch =='Y' )
system ( "C: \\ WINDOWS\
\ System32 \\ shutdown /s" ) ;
return 0 ;
}