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{"managingGroups":{},"author":"18fengqianfei","updateTime":1573267449000,"title":"c++","dislikeCnt":0,"content":"保留N位小数\n\ninclude \u003c iomanip\u003e //头文件\ncout\u003c\u003cfixed\u003c\u003csetprecision(N); //(以下输出均为两位小数;","threadId":58970,"likeCnt":0,"createTime":1573267449000,"isWorkbook":false,"viewCnt":1718,"openness":2,"fav":false,"id":2091,"trustable":false}