1.5倍空间归并排序--Knuth 2014-09-25 11:42:00 divide-and-conquer algorithm, in the style suggested by Knuth volume 3 (2nd edition), 1 2 3 4 5 6 7 8 |-------------I-------------|-------------| p1 p2 ex p1+p2原数组,p1前半部分,p2后半部分,ex额外空间 1、将p2用ex额外空间排到p2 2、将p1排到ex 3、将p2、ex合并到原数组