Program to enter a upper case character and convert into lower case in c

/* program to convert a upper case character into lower case */
# include <stdio.h>
void main ()
{
char ch ;
clrscr () ;
printf ("/n enter a upper case character:") ;
scanf ("%c", & ch) ;
ch =ch+32 ;
printf ("%c", ch) ;
getch () ;
}