int ch ; F>%,}Y~B:
ch=getche() ; d/YQ6oKU
if((ch>='a') && (ch<='z')) :z|$K^)7Z
printf("%c is a lowercase letter\n" ,ch); uF)^mT0D=
else if ((ch>='A') && (ch<='Z')) e%0IEX
print(" %c is a uppercase letter\n" ,ch); _LWMz=U=J/
else if((ch>'0')&&(ch<'9') +]hc!s8
printf(" %c is a number character between 0 and 9\n" ,ch) ; @ W q8AFo
else @9k/od@mW
printf("%c is...") \Z~
<jv
l9H-N*Wx
外面再加个循环就行了