int ch ; c^$+=-G{fd
ch=getche() ; PN +<C7/
if((ch>='a') && (ch<='z')) 7wm9S4+|
printf("%c is a lowercase letter\n" ,ch); EE^
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else if ((ch>='A') && (ch<='Z')) )]^xy&:|
print(" %c is a uppercase letter\n" ,ch); <]/z45?
else if((ch>'0')&&(ch<'9') $;ssW"7~Qn
printf(" %c is a number character between 0 and 9\n" ,ch) ; itp$c|{
else Wb|xEwq d`
printf("%c is...") %U4w@jp
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外面再加个循环就行了