Functions that Return a Value

#include<stdio.h>
#include<conio.h>
char getlc(void);


void main(void)
{
 char chlc;
 printf("Type 'a' for first selection, 'b' for second: ");
 chlc=getche();
 switch(chlc)
  {
   case'a':
   printf("\nYou typed an 'a'.");
   break;
   case'b':
   printf("\nYou typed a 'b'.");
   break;
   default:
   printf("\nYou chose a nonexistent selection.");
  }
}
char getlc(void)
{
 char ch;
 ch=getche();
 if(ch>64&&ch<91)
 ch=ch+32;
 return(ch);
}


Output:
Type 'a' for first selection, 'b' for second: a
You typed an 'a'.

Type 'a' for first selection, 'b' for second: A

You typed an 'a'.

Type 'a' for first selection, 'b' for second: c

You chose a nonexistent selection.