int ch ; lt4jnV2"a
ch=getche() ; ^wa9zs2s;/
if((ch>='a') && (ch<='z')) `5Btg.
&
printf("%c is a lowercase letter\n" ,ch); !5j3gr~
else if ((ch>='A') && (ch<='Z')) {1aAm+
print(" %c is a uppercase letter\n" ,ch); mM*yv
else if((ch>'0')&&(ch<'9') SN(=e#ljE
printf(" %c is a number character between 0 and 9\n" ,ch) ; N o(f0g.
else +{%(_<
printf("%c is...") V|\A?
>k}/$R+
外面再加个循环就行了