1 void rank_list(SqList &L)
2 {
3 student p;
4 int i,j;
5 for( i=1;i<L.length;++i)
6 if(L.elem[i].average>L.elem[i-1].average)
7 {
8 p=L.elem[i];
9 L.elem[i]=L.elem[i-1]; //赋值的都是地址
10 for( j=i-1;j>=0&&L.elem[i].average<L.elem[j].average;--j)//老师说这块是j=i-2，但是i从1开始
11 L.elem[j+1]=L.elem[j];
12 L.elem[j+1]=p;
13 }
14
15 student *t;
16 i=0;
17 for(t=L.elem;t<L.elem+L.length;t++) //给order赋值
18 {
19 L.elem[i].order=i+1;
20 i++;
21 }
22 /*
23 //折半插入排序
24 student p;
25 int i,j,low,high,mid;
26 for(i=1;i<L.length;++i)
27 {
28 p=L.elem[i];
29 low=0;high=i-1;
30 while(low<=high)
31 {
32 mid=(low+high)/2;
33 if(L.elem[i].average>L.elem[mid].average)
34 high=mid-1;
35 else
36 low=mid+1;
37 }
38 for(j=i-1;j>=high+1;--j)
39 L.elem[j+1]=L.elem[j];
40 L.elem[high+1]=p;
41 }
42 student *t;
43 i=0;
44 for(t=L.elem;t<L.elem+L.length;t++) //给order赋值
45 {
46 L.elem[i].order=i+1;
47 i++;
48 }
49
50 希尔排序
51 int i,j,gap;
52 for(gap=L.length/2;gap>0;gap/=2)
53 for(i=gap;i<L.length;i++)
54 for(j=i-gap;j>=0&&L.elem[j].average<L.elem[gap+j].average;j-=gap)
55 {
56 student p;
57 p=L.elem[j];
58 L.elem[j]=L.elem[j+gap];
59 L.elem[j+gap]=p;
60 }
61
62 冒泡排序
63 student *p,*q;
64 p=L.elem;q=L.elem;
65 for(p;p<L.elem+L.length;p++)
66 {
67 for(q=p;q<L.elem+L.length-1;q++)
68 {
69 if(q->average<(q+1)->average)
70 {
71 student t; //这块必须这么写，不然排不好，队成员一个一个换太麻烦
72 t=*q;
73 *q=*(q+1);
74 *(q+1)=t;
75 }
76 }
77 }
78
79
80 student *t;
81 i=0;
82 for(t=L.elem;t<L.elem+L.length;t++) //给order赋值
83 {
84 L.elem[i].order=i+1;
85 i++;
86 }
87 }
88
89 快排
90 void quick_sort(SqList &L,int l,int r)
91 {
92 int i,j;
93 if(r<l)
94 {
95 j=0;r=L.length;int x=L.elem[l].average;
96 while(i<j)
97 {
98 while(i<j&&L.elem[j].average>=x)
99 j--;
100 if(i<j)
101 L.elem[i++].average=L.elem[j].average;
102 while(i>j&&L.elem[i].average<x)
103 i++;
104 if(i<j)
105 L.elem[j--].average=L.elem[i].average;
106 }
107 L.elem[i].average=x;
108 quick_sort(L,l,i-1);
109 quick_sort(L,i+1,r);
110 }
111 }
void rank_list(SqList &L)
{
student p;
int i,j;
for( i=1;i<L.length;++i)
if(L.elem[i].average>L.elem[i-1].average)
{
p=L.elem[i];
L.elem[i]=L.elem[i-1]; //赋值的都是地址
for( j=i-1;j>=0&&L.elem[i].average<L.elem[j].average;--j)//老师说这块是j=i-2，但是i从1开始
L.elem[j+1]=L.elem[j];
L.elem[j+1]=p;
}
student *t;
i=0;
for(t=L.elem;t<L.elem+L.length;t++) //给order赋值
{
L.elem[i].order=i+1;
i++;
}
/*
//折半插入排序
student p;
int i,j,low,high,mid;
for(i=1;i<L.length;++i)
{
p=L.elem[i];
low=0;high=i-1;
while(low<=high)
{
mid=(low+high)/2;
if(L.elem[i].average>L.elem[mid].average)
high=mid-1;
else
low=mid+1;
}
for(j=i-1;j>=high+1;--j)
L.elem[j+1]=L.elem[j];
L.elem[high+1]=p;
}
student *t;
i=0;
for(t=L.elem;t<L.elem+L.length;t++) //给order赋值
{
L.elem[i].order=i+1;
i++;
}
希尔排序
int i,j,gap;
for(gap=L.length/2;gap>0;gap/=2)
for(i=gap;i<L.length;i++)
for(j=i-gap;j>=0&&L.elem[j].average<L.elem[gap+j].average;j-=gap)
{
student p;
p=L.elem[j];
L.elem[j]=L.elem[j+gap];
L.elem[j+gap]=p;
}
冒泡排序
student *p,*q;
p=L.elem;q=L.elem;
for(p;p<L.elem+L.length;p++)
{
for(q=p;q<L.elem+L.length-1;q++)
{
if(q->average<(q+1)->average)
{
student t; //这块必须这么写，不然排不好，队成员一个一个换太麻烦
t=*q;
*q=*(q+1);
*(q+1)=t;
}
}
}
student *t;
i=0;
for(t=L.elem;t<L.elem+L.length;t++) //给order赋值
{
L.elem[i].order=i+1;
i++;
}
}
快排
void quick_sort(SqList &L,int l,int r)
{
int i,j;
if(r<l)
{
j=0;r=L.length;int x=L.elem[l].average;
while(i<j)
{
while(i<j&&L.elem[j].average>=x)
j--;
if(i<j)
L.elem[i++].average=L.elem[j].average;
while(i>j&&L.elem[i].average<x)
i++;
if(i<j)
L.elem[j--].average=L.elem[i].average;
}
L.elem[i].average=x;
quick_sort(L,l,i-1);
quick_sort(L,i+1,r);
}
}
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