91优化的主要种类 912一个实例 m-1;j=n;v=an; (9)j=j-1 while (1)i 10)t4=4*j do i=i+l; while(ai]v) do j=j-l; while(ail>);(12)if ts>v goto(9) if(i>=j break (13)if i>=j goto(23) X=all: al=ali: alllEx (15)x=a|t6l x=ai; aian: an=x9.1 优化的主要种类 9.1.2 一个实例 i = m −1; j = n; v = a[n]; (9) j = j −1 while (1) { (10) t4 = 4  j do i = i +1; while(a[i]<v); (11) t5 = a[t4 ] do j =j −1;while (a[j]>v); (12) if t5>v goto (9) if (i >= j) break; (13) if i >=j goto (23) x=a[i]; a[i]=a[j]; a[j]=x; (14) t6 = 4  i } (15 ) x = a[t6 ] x=a[i]; a[i]=a[n]; a[n]=x; . .