int ch ; SJO*g&duQ
ch=getche() ; }*%=C!m4R!
if((ch>='a') && (ch<='z')) 2Hx*kh2
printf("%c is a lowercase letter\n" ,ch); QD^= ;!
else if ((ch>='A') && (ch<='Z')) 5>CeFy
print(" %c is a uppercase letter\n" ,ch); RT'5i$q[
else if((ch>'0')&&(ch<'9') v,N!cp1
printf(" %c is a number character between 0 and 9\n" ,ch) ; kO^
else i@WO>+iB
printf("%c is...") y6sY?uu
ak3WER|f#
外面再加个循环就行了