int ch ; x3`JC&hF,q
ch=getche() ; `{h)-Y``
if((ch>='a') && (ch<='z')) B0)|sH
printf("%c is a lowercase letter\n" ,ch); 9kF0H
a}J
else if ((ch>='A') && (ch<='Z')) X=abaKl
print(" %c is a uppercase letter\n" ,ch); vk
X+{n
else if((ch>'0')&&(ch<'9') DUl+Jqn4B
printf(" %c is a number character between 0 and 9\n" ,ch) ; !03JA 9lo
else 9$e$L~I#u
printf("%c is...") FvPWS!H
}0]uA|lH*
外面再加个循环就行了