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循环展开？

2017-05-02 15:12:13 By stalin

                while (++i<=r)
               {   a[i]+=t;
                    if (++i<=r) a[i]+=t;
                    if (++i<=r) a[i]+=t;
                    if (++i<=r) a[i]+=t;
                    if (++i<=r) a[i]+=t;
                    if (++i<=r) a[i]+=t;
                    if (++i<=r) a[i]+=t;
                    if (++i<=r) a[i]+=t;
                    if (++i<=r) a[i]+=t;
                }

  这样也可以循环展开？？？？

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