int ch ; 'vUx4s
ch=getche() ; Zjx:1c= b
if((ch>='a') && (ch<='z')) \%+5p"Z<
printf("%c is a lowercase letter\n" ,ch);
uRfFPOYH
else if ((ch>='A') && (ch<='Z')) dy^ zOqc
print(" %c is a uppercase letter\n" ,ch); ~kW[d1'c
else if((ch>'0')&&(ch<'9') +>wBGVvS
printf(" %c is a number character between 0 and 9\n" ,ch) ; e4/Y/:vFO
else 5T4!'4n
printf("%c is...") >|@i8?|E
~i y]X:U
外面再加个循环就行了