早期人肉实现 － 简单排序算法代码
包括MergeSort， QuickSort， 包括数组和链表的实现
1
// SortAlgorithm.cpp : Defines the entry point for the console application.
2//
3
4#include "stdafx.h"
5#include <iostream>
6#include <time.h>
7#include "CProTimer.h"
8
9using namespace std;
10const int nSize = 500000 ;
11
12// MergeSort
13void MergeSort( int nlow, int nhigh);
14void Merge( int nlow, int nmid, int nhigh);
15int A[nSize];
16int B[nSize]; // temp array
17
18// MergeSortL
19int MergeSortL( int low, int high);//, int p
20int MergeL( int q, int r );//返回int p
21int InsertSortL( int low, int high);//, int p
22int AL[nSize+1]; //比较特殊，第0个不用
23int Link[nSize+1]; // linked list
24
25//QuickSort
26int Partition( int m, int p);
27void QuickSort( int p, int q);
28int Aq[nSize];
29void InsertSort(int p,int q);
30
31int _tmain(int argc, _TCHAR* argv[])
32
{
33
srand( (unsigned)time( NULL ) );
34 for (int i=1; i<nSize+1; i++)
35
{
36 AL[i] = (int)rand() ;
37 Link[i]=i+1;
38
39 Aq[i-1] = AL[i];
40
}
41 Link[0]=1;
42 Link[nSize]=0;
43 //MergeSort( 0, nSize-1);
44
45 // Aq[3]=Aq[0];
46 //for (int i=0; i<nSize; i++)
47 //{
48 // cout<< Aq[i] << " ";
49
50 //}
51 cout<< endl;
52
53// int s1=CTime::GetCurrentTime();
54 //int e1=CTime::GetCurrentTime();
55
56 CProTimer proTimer;
57 proTimer.Reset();
58 MergeSortL(1,nSize);
59 float f=proTimer.GetTimeMicro(TRUE);
60 cout<<"MergeSort: "<<nSize<<"个耗时(Microsecond): "<< f <<endl;
61
62// s1=GetTickCount();
63 proTimer.Reset();
64 QuickSort(0,nSize-1) ;
65// e1=GetTickCount();
66 f=proTimer.GetTimeMicro(TRUE);
67 cout<<"QuickSort: "<<nSize<<"个耗时(Microsecond): "<< f << endl;
68
69 //for (int i=0; i<nSize; i++)
70 //{
71 //
72 // cout<< Aq[i] << " ";
73
74 //}
75 //cout<<endl<<"quicksort data:"<<endl;
76 //int i=0;
77 //while (1)
78 //{
79 // int temp=AL[i];
80 // i=Link[i];
81 // if (i==0)
82 // {
83 // break;
84 // }
85 // cout<<AL[i]<<" ";
86 //}
87
88 ;
89 //for (int i=0; i<(nSize-1); i++)
90 //{
91 // cout<< (Aq[i+1]-Aq[i]) << " ";
92 // if ((Aq[i+1]-Aq[i])<0)
93 // {
94 // cout<<endl<<"*****"<<endl;
95 // }
96 //
97 //}
98
99 return 0;
100
}
101
102void MergeSort( int nlow, int nhigh)
103{
104 if ( nlow < nhigh )
105 {
106 int nmid = ( nlow + nhigh ) / 2;
107
108 MergeSort( nlow, nmid);
109
110
111 MergeSort( (nmid+1) , nhigh);
112
113 Merge( nlow, nmid, nhigh );
114 }
115}
116
117void Merge( int nlow, int nmid, int nhigh )
118{
119 int h, i, j, k;
120 //
121 h = nlow; i = nlow; j = nmid +1;
122
123 while ( h <= nmid && j <= nhigh)
124 {
125 if ( A[h] <= A[j] )
126 {
127 B[i++] = A[h++];
128
129 }
130 else
131 {
132 B[i++] = A[j++];
133 }
134 }
135
136 //while (j <=nhigh)
137 //{
138 // B[i++]=A[j++];
139 //}
140 //while (h <=nmid)
141 //{
142 // B[i++]=A[h++];
143 //}
144 if( h > nmid)
145 for ( k= j; k <=nhigh; k ++)
146 {
147 B[i]=A[k];
148 ++i;
149 }
150 else
151 for (k = h; k <=nmid; k ++)
152 {
153 B[i]=A[k];
154 ++i;
155 }
156
157 for ( k = nlow; k <=nhigh; k ++)
158 {
159 A[k] = B[k];
160 }
161
162}
163
164// MergeSortL
165int MergeSortL(int low, int high)
166{
167 if ( high - low < 10)
168 {
169 return InsertSortL(low,high);
170 }
171 else
172 {
173 int mid = (low+high)/2;
174 int q=MergeSortL(low, mid);
175 int r=MergeSortL(mid+1,high);
176 return MergeL(q,r);
177 }
178}
179int MergeL( int q, int r)
180{
181 int i=q,j=r,k=0;
182 while (i!=0&&j!=0)
183 {
184 if (AL[i] <= AL[j])
185 {
186 Link[k]=i;
187 k=i;
188 i=Link[i];
189 }
190 else
191 {
192 Link[k]=j;
193 k=j;
194 j=Link[j];
195 }
196
197 }
198 if (i==0)
199 {
200 Link[k]=j;
201 }
202 else
203 Link[k]=i;
204
205 return Link[0];
206
207}
208int InsertSortL( int low, int high)
209{
210 for (int i=low;i<=high;i++)
211 {
212 for (int j=i;j<=high;j++)
213 {
214 if (AL[j]<AL[i])
215 {
216 int temp = AL[i];
217 AL[i]=AL[j];
218 AL[j]=temp;
219 }
220 }
221 }
222 Link[high]=0;
223 return low;
224}
225
226// Quick Sort
227int Partition(int m, int p)
228{
229 int i;
230 int v = Aq[m];
231 int t1=m,t2=p;
232 int v1=Aq[p],v2=Aq[(m+p)/2]; //选择首，中，尾三个数中的中间值
233 if ((v-v1)*(v-v2)>0)
234 {
235 if (v>v1)
236 {
237 if (v1>v2)
238 {
239 Aq[m]=v1;
240 Aq[p]=v;
241 v=v1;
242 }
243 else
244 {
245 Aq[m]=v2;
246 Aq[(m+p)/2]=v;
247 v=v2;
248 }
249 }
250 else
251 {
252 if (v1<v2)
253 {
254 Aq[m]=v1;
255 Aq[p]=v;
256 v=v1;
257 }
258 else
259 {
260 Aq[m]=v2;
261 Aq[(m+p)/2]=v;
262 v=v2;
263 }
264
265 }
266 }
267
268 i=m;
269 //p=p-1;
270 while (1)
271 {
272 while (Aq[i]<=v)
273 {
274 i++;
275 }
276 while (Aq[p]>=v&&p>m)
277 {
278 p--;
279 }
280 if ( i < p)
281 {
282 int temp = Aq[i];
283 Aq[i]=Aq[p];
284 Aq[p]=temp;
285 }
286 else
287 break;
288
289 }
290
291 if (p<0)
292 {
293 cout<<"";
294 }
295 Aq[m]=Aq[p]; Aq[p]=v;
296 return p;
297
298}
299
300void QuickSort( int p, int q)
301{
302 if (q>p)
303 {
304 if ((q-p)<10)
305 {
306 InsertSort(p,q);
307 }
308 else
309 {
310 int x=Partition(p,q);
311 QuickSort(p,x-1);
312 QuickSort(x+1,q);
313 }
314
315 }
316}
317
318void InsertSort(int p,int q)
319{
320 for (int i=p;i<=q;i++)
321 {
322 for (int j=i;j<=q;j++)
323 {
324 if (Aq[j]<Aq[i])
325 {
326 int temp = Aq[i];
327 Aq[i]=Aq[j];
328 Aq[j]=temp;
329 }
330 }
331 }
332}
// SortAlgorithm.cpp : Defines the entry point for the console application.2
//3
4
#include "stdafx.h"5
#include <iostream>6
#include <time.h> 7
#include "CProTimer.h"8
9
using namespace std;10
const int nSize = 500000 ;11
12
// MergeSort13
void MergeSort( int nlow, int nhigh);14
void Merge( int nlow, int nmid, int nhigh);15
int A[nSize];16
int B[nSize]; // temp array17
18
// MergeSortL19
int MergeSortL( int low, int high);//, int p20
int MergeL( int q, int r );//返回int p21
int InsertSortL( int low, int high);//, int p22
int AL[nSize+1]; //比较特殊，第0个不用23
int Link[nSize+1]; // linked list24
25
//QuickSort26
int Partition( int m, int p);27
void QuickSort( int p, int q);28
int Aq[nSize];29
void InsertSort(int p,int q);30
31
int _tmain(int argc, _TCHAR* argv[])32
{
33
srand( (unsigned)time( NULL ) );34
for (int i=1; i<nSize+1; i++)35
{
36
AL[i] = (int)rand() ;37
Link[i]=i+1;38
39
Aq[i-1] = AL[i];40
}41
Link[0]=1;42
Link[nSize]=0; 43
//MergeSort( 0, nSize-1);44
45
// Aq[3]=Aq[0];46
//for (int i=0; i<nSize; i++)47
//{48
// cout<< Aq[i] << " ";49
50
//}51
cout<< endl;52
53
// int s1=CTime::GetCurrentTime(); 54
//int e1=CTime::GetCurrentTime();55
56
CProTimer proTimer;57
proTimer.Reset();58
MergeSortL(1,nSize);59
float f=proTimer.GetTimeMicro(TRUE);60
cout<<"MergeSort: "<<nSize<<"个耗时(Microsecond): "<< f <<endl;61
62
// s1=GetTickCount();63
proTimer.Reset();64
QuickSort(0,nSize-1) ;65
// e1=GetTickCount();66
f=proTimer.GetTimeMicro(TRUE);67
cout<<"QuickSort: "<<nSize<<"个耗时(Microsecond): "<< f << endl;68
69
//for (int i=0; i<nSize; i++)70
//{71
//72
// cout<< Aq[i] << " ";73
74
//}75
//cout<<endl<<"quicksort data:"<<endl;76
//int i=0;77
//while (1)78
//{79
// int temp=AL[i];80
// i=Link[i];81
// if (i==0)82
// {83
// break;84
// }85
// cout<<AL[i]<<" ";86
//}87
88
;89
//for (int i=0; i<(nSize-1); i++)90
//{91
// cout<< (Aq[i+1]-Aq[i]) << " ";92
// if ((Aq[i+1]-Aq[i])<0)93
// {94
// cout<<endl<<"*****"<<endl;95
// }96
// 97
//}98
99
return 0;100
}101
102
void MergeSort( int nlow, int nhigh)103
{104
if ( nlow < nhigh )105
{106
int nmid = ( nlow + nhigh ) / 2;107
108
MergeSort( nlow, nmid);109
110
111
MergeSort( (nmid+1) , nhigh);112
113
Merge( nlow, nmid, nhigh );114
}115
}116
117
void Merge( int nlow, int nmid, int nhigh )118
{119
int h, i, j, k;120
// 121
h = nlow; i = nlow; j = nmid +1;122
123
while ( h <= nmid && j <= nhigh)124
{125
if ( A[h] <= A[j] )126
{127
B[i++] = A[h++];128
129
}130
else131
{132
B[i++] = A[j++]; 133
} 134
}135
136
//while (j <=nhigh)137
//{138
// B[i++]=A[j++];139
//}140
//while (h <=nmid)141
//{142
// B[i++]=A[h++];143
//}144
if( h > nmid)145
for ( k= j; k <=nhigh; k ++)146
{147
B[i]=A[k];148
++i;149
}150
else151
for (k = h; k <=nmid; k ++)152
{153
B[i]=A[k];154
++i;155
}156
157
for ( k = nlow; k <=nhigh; k ++)158
{159
A[k] = B[k];160
}161
162
}163
164
// MergeSortL165
int MergeSortL(int low, int high)166
{167
if ( high - low < 10)168
{169
return InsertSortL(low,high);170
}171
else172
{173
int mid = (low+high)/2;174
int q=MergeSortL(low, mid);175
int r=MergeSortL(mid+1,high);176
return MergeL(q,r);177
}178
}179
int MergeL( int q, int r)180
{181
int i=q,j=r,k=0;182
while (i!=0&&j!=0)183
{184
if (AL[i] <= AL[j])185
{186
Link[k]=i;187
k=i;188
i=Link[i];189
}190
else191
{192
Link[k]=j;193
k=j;194
j=Link[j];195
}196
197
}198
if (i==0)199
{200
Link[k]=j;201
}202
else203
Link[k]=i;204
205
return Link[0];206
207
}208
int InsertSortL( int low, int high)209
{210
for (int i=low;i<=high;i++)211
{212
for (int j=i;j<=high;j++)213
{214
if (AL[j]<AL[i])215
{216
int temp = AL[i];217
AL[i]=AL[j];218
AL[j]=temp;219
}220
}221
}222
Link[high]=0;223
return low; 224
}225
226
// Quick Sort227
int Partition(int m, int p)228
{229
int i;230
int v = Aq[m]; 231
int t1=m,t2=p;232
int v1=Aq[p],v2=Aq[(m+p)/2]; //选择首，中，尾三个数中的中间值233
if ((v-v1)*(v-v2)>0)234
{235
if (v>v1)236
{237
if (v1>v2)238
{239
Aq[m]=v1;240
Aq[p]=v;241
v=v1;242
}243
else244
{245
Aq[m]=v2;246
Aq[(m+p)/2]=v;247
v=v2;248
}249
}250
else251
{252
if (v1<v2)253
{254
Aq[m]=v1;255
Aq[p]=v;256
v=v1;257
}258
else259
{260
Aq[m]=v2;261
Aq[(m+p)/2]=v;262
v=v2;263
}264
265
}266
}267
268
i=m;269
//p=p-1;270
while (1)271
{272
while (Aq[i]<=v)273
{ 274
i++;275
}276
while (Aq[p]>=v&&p>m)277
{ 278
p--;279
}280
if ( i < p)281
{ 282
int temp = Aq[i];283
Aq[i]=Aq[p];284
Aq[p]=temp; 285
}286
else287
break;288
289
}290
291
if (p<0)292
{293
cout<<"";294
}295
Aq[m]=Aq[p]; Aq[p]=v;296
return p;297
298
}299
300
void QuickSort( int p, int q)301
{302
if (q>p)303
{304
if ((q-p)<10)305
{306
InsertSort(p,q);307
}308
else309
{310
int x=Partition(p,q);311
QuickSort(p,x-1);312
QuickSort(x+1,q);313
}314
315
}316
}317
318
void InsertSort(int p,int q)319
{320
for (int i=p;i<=q;i++)321
{322
for (int j=i;j<=q;j++)323
{324
if (Aq[j]<Aq[i])325
{326
int temp = Aq[i];327
Aq[i]=Aq[j];328
Aq[j]=temp;329
}330
}331
}332
}
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