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A prototype object is given. Q: How can this be done? A: It's very simple. Just give a prototype class directly.Int result = cal.calculate (exp, "\ +");Has the code been integrated and Debug in accordance with the design documentation　　本節目以下列事件作為藍本、改編成鬼魅懸疑故事，以全戲劇形式拍攝，藉梁思浩與各詭異事件的主角們真誠對話，帶出一幕幕不可思議的情節，更會邀請靈異專家一同探討箇中奧秘…At the end of the match, there will be a break for a period of time. The second match will be played by the loser of the first match and C, so as to maintain the appreciation of the match. Because if the winner of the first match and C play, there will be no suspense for the third match if he wins in a row.Although the above code can meet the requirements, it is not easy to expand and difficult to read. If I want one or two conditions in the future, if I want to recharge 300 yuan successfully, I can win the 150 yuan red envelope, then I have to change the code inside at this time, so the coupling between business logic and code is relatively high, and I accidentally correct the wrong code. At this time, we try to use the responsibility chain mode to transfer objects in turn to realize it.The hotel as a whole is relatively simple and unsophisticated, with spacious, neat and slightly old rooms.