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In the above code, we use three functions, order500, order200, orderNormal to handle its own business logic, If the current own function cannot handle things, We pass it to the following function to handle it. By analogy, Until there is a function that can handle him, Otherwise, the responsibility chain mode will leave the chain directly, telling that it cannot be processed and throwing an error prompt. Although the above code can be used as the responsibility chain mode, we can see from the above code that the Order500 function depends on functions such as Order200, so there must be this function, which also violates the open-closed principle in object-oriented. Let's continue to understand writing flexible and detachable responsibility chain nodes.Public class Computer {改革开放初期，国家政策调整，计算机研究所进行变革。研究员张镇南萌生了开公司的想法，公司创立的过程极其艰辛。张镇南看准时机，领导研发了汉卡，随后与P&P公司合作进一步增强了公司的实力。在独立扛起国产电脑大旗之后，他们面对国内外众多集团品牌的激烈竞争，此时张镇南却又不得不和往日战友对簿公堂。然而，任何困难都挡不住张镇南想要走上更大舞台的决心，收购国际计算机业巨头P&P之后，张镇南和他的天驰公司站到了世界电子业的顶峰。Remind me that in order to ensure the correct direction of elevation numbers, the system variable MIRRTEXT? The value of should be set to '0'. The shortcut key for the move command is "M"公子有气运。Time of sale: 15th of February 2019