int ch ; [C)-=.Xx)j
ch=getche() ; o@r+Y
if((ch>='a') && (ch<='z')) eqQA st#~
printf("%c is a lowercase letter\n" ,ch); rm NqS+t
else if ((ch>='A') && (ch<='Z')) <IGQBu#ZH
print(" %c is a uppercase letter\n" ,ch); h\b]>q@
else if((ch>'0')&&(ch<'9') B]q
&?~
printf(" %c is a number character between 0 and 9\n" ,ch) ; ~&=-*
else }N1Z7G
printf("%c is...") jx&pRjP
#z) @T
外面再加个循环就行了