int ch ; J0}OmNTzD
ch=getche() ; 1_7}B4
if((ch>='a') && (ch<='z')) 1@H3!V4
printf("%c is a lowercase letter\n" ,ch); MdWT[
else if ((ch>='A') && (ch<='Z')) 0j1I
print(" %c is a uppercase letter\n" ,ch); FxC@KZG
else if((ch>'0')&&(ch<'9') _wg6}3
printf(" %c is a number character between 0 and 9\n" ,ch) ; LmLV2f
else
@>J4K#"
printf("%c is...") ?<Dinq
Rp)82-
.
外面再加个循环就行了