int ch ; !63p?Q=
ch=getche() ; =&RpW7]
if((ch>='a') && (ch<='z')) ;*^2,_
printf("%c is a lowercase letter\n" ,ch); +G';no\h
else if ((ch>='A') && (ch<='Z'))
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print(" %c is a uppercase letter\n" ,ch); W 86`R
else if((ch>'0')&&(ch<'9') Tf/jd 3>
printf(" %c is a number character between 0 and 9\n" ,ch) ; pj:s+7"t
else ?.d6!vA
printf("%c is...") \ s^a4l2
q(sEN!^L`
外面再加个循环就行了