int ch ; ##v`(#fu
ch=getche() ; )(lJT&e
if((ch>='a') && (ch<='z')) f}2;N
printf("%c is a lowercase letter\n" ,ch); 3-iD.IAUm@
else if ((ch>='A') && (ch<='Z')) IytDvz*|
print(" %c is a uppercase letter\n" ,ch); $T?]+2,6;
else if((ch>'0')&&(ch<'9') cv]BV>=E
printf(" %c is a number character between 0 and 9\n" ,ch) ; V:OiW"/
else b4)k &*dfR
printf("%c is...") O:._W<
2$tQ @r
外面再加个循环就行了