int ch ; j-e/nZR@
ch=getche() ; Z/n\Ak sE
if((ch>='a') && (ch<='z')) 7O84R^!|2
printf("%c is a lowercase letter\n" ,ch); A%qlB[!:
else if ((ch>='A') && (ch<='Z')) Dl_y[9
print(" %c is a uppercase letter\n" ,ch); Y]!8Ymuww@
else if((ch>'0')&&(ch<'9') -!zyit5B
printf(" %c is a number character between 0 and 9\n" ,ch) ; e@}zp
else ~M7
J{hK
printf("%c is...") ?=}~]A5N
]A+q:kP
外面再加个循环就行了