price=input('請輸入商品價格');
switch fix(price/100) 
   case {0,1}             %價格小于200
      rate=0;
   case {2,3,4}            %價格大于等于200但小于500
      rate=3/100;
   case num2cell(5:9)       %價格大于等于500但小于1000
      rate=5/100;
   case num2cell(10:24)     %價格大于等于1000但小于2500
      rate=8/100;
   case num2cell(25:49)     %價格大于等于2500但小于5000
      rate=10/100;
   otherwise               %價格大于等于5000
      rate=14/100;
end
price=price*(1-rate)              %輸出商品實際銷售價格