int ch ; MPF({Pnx7
ch=getche() ; qxYCT$1
if((ch>='a') && (ch<='z')) ;Zn&Nc7
printf("%c is a lowercase letter\n" ,ch); PF+Or
else if ((ch>='A') && (ch<='Z')) +]0hSpZ"p
print(" %c is a uppercase letter\n" ,ch); Qh*}v!3Jo
else if((ch>'0')&&(ch<'9') ]v:"
printf(" %c is a number character between 0 and 9\n" ,ch) ; _Ih"*~ r/&
else qac:"z'9
printf("%c is...") '2rSX[$tf
'pF$6n;
外面再加个循环就行了