1. #include <stdio.h>
  2. #include "/home6/drs/include/simpleio.h"
  3. int main()
  4. {
  5. 	char ch;
  6. 	printf("Please enter a single character "); ch=getChar();
  7. 	if (ch >= '0' && ch <= '9')
  8. 	{
  9. 			printf("%c is a digit \n", ch);
  10. 	}
  11. 	else if (ch >= 'A' && ch <= 'Z')
  12. 	{
  13. 			printf("%c is a upper case letter \n", ch);
  14. 	}
  15. 	else if (ch >= 'a' && ch <= 'z')
  16. 	{
  17. 			printf("%c is a lower case letter \n", ch);
  18. 	}
  19. 	else
  20. 	return 1;
  21. }