#include <stdio.h>#include "/home6/drs/include/simpleio.h"int main(){ char ch; printf("Please enter a single character "); ch=getChar(); if (ch >= '0' && ch <= '9') { printf("%c is a digit \n", ch); } else if (ch >= 'A' && ch <= 'Z') { printf("%c is a upper case letter \n", ch); } else if (ch >= 'a' && ch <= 'z') { printf("%c is a lower case letter \n", ch); } else return 1;}