int ch ; <ztcCRov
ch=getche() ; xVnk]:c
if((ch>='a') && (ch<='z')) C\`*_t
printf("%c is a lowercase letter\n" ,ch); |(eRv?Qy@
else if ((ch>='A') && (ch<='Z')) simD<&p
print(" %c is a uppercase letter\n" ,ch); 2|a5xTzH
else if((ch>'0')&&(ch<'9') #3~hF)u&/
printf(" %c is a number character between 0 and 9\n" ,ch) ; |7CFm
else C(Cuk4K
printf("%c is...") y@Gl'@-O
3*(w=;y
外面再加个循环就行了