int ch ; d$fvg8^
ch=getche() ; ?aFr8i:)M
if((ch>='a') && (ch<='z')) BFMS*t`
printf("%c is a lowercase letter\n" ,ch); 5[,+\
else if ((ch>='A') && (ch<='Z')) 0{?:FQ#
print(" %c is a uppercase letter\n" ,ch); Ak5[PBbW
else if((ch>'0')&&(ch<'9') d&[iEU
printf(" %c is a number character between 0 and 9\n" ,ch) ; AozmO
else @sw9A93A
printf("%c is...") Y^R?Q'
{gFAvMj#
外面再加个循环就行了