图的遍历(邻居(链表+队列)实例
1.#include <stdio.h>
#include <stdlib.h>
#include "LGraph.h"
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
void print_data(LVertex* v)
{
printf("%s", (char*)v);
}
int main(int argc, char *argv[])
{
LVertex* v[] = {"A", "B", "C", "D", "E", "F"};
LGraph* graph = LGraph_Create(v, 6);
LGraph_AddEdge(graph, 0, 1, 1);
LGraph_AddEdge(graph, 0, 2, 1);
LGraph_AddEdge(graph, 0, 3, 1);
LGraph_AddEdge(graph, 1, 5, 1);
LGraph_AddEdge(graph, 1, 4, 1);
LGraph_AddEdge(graph, 2, 1, 1);
LGraph_AddEdge(graph, 3, 4, 1);
LGraph_AddEdge(graph, 4, 2, 1);
LGraph_Display(graph, print_data);
LGraph_DFS(graph, 0, print_data);
LGraph_BFS(graph, 0, print_data);
LGraph_Destroy(graph);
return 0;
}
2.
#ifndef _LGRAPH_H_
#define _LGRAPH_H_
typedef void LGraph;
typedef void LVertex;
typedef void (LGraph_Printf)(LVertex*);
LGraph* LGraph_Create(LVertex** v, int n);
void LGraph_Destroy(LGraph* graph);
void LGraph_Clear(LGraph* graph);
int LGraph_AddEdge(LGraph* graph, int v1, int v2, int w);
int LGraph_RemoveEdge(LGraph* graph, int v1, int v2);
int LGraph_GetEdge(LGraph* graph, int v1, int v2);
int LGraph_TD(LGraph* graph, int v);
int LGraph_VertexCount(LGraph* graph);
int LGraph_EdgeCount(LGraph* graph);
void LGraph_DFS(LGraph* graph, int v, LGraph_Printf* pFunc);
void LGraph_BFS(LGraph* graph, int v, LGraph_Printf* pFunc);
void LGraph_Display(LGraph* graph, LGraph_Printf* pFunc);
#endif
3.#include <malloc.h>
#include <stdio.h>
#include "LGraph.h"
#include "LinkList.h"
#include "LinkQueue.h"
typedef struct _tag_LGraph
{
int count;
LVertex** v;
LinkList** la;
} TLGraph;
typedef struct _tag_ListNode
{
LinkListNode header;
int v;
int w;
} TListNode;
static void recursive_dfs(TLGraph* graph, int v, int visited[], LGraph_Printf* pFunc)
{
int i = 0;
pFunc(graph->v[v]);
visited[v] = 1;
printf(", ");
for(i=0; i<LinkList_Length(graph->la[v]); i++)
{
TListNode* node = (TListNode*)LinkList_Get(graph->la[v], i);
if( !visited[node->v] )
{
recursive_dfs(graph, node->v, visited, pFunc);
}
}
}
static void bfs(TLGraph* graph, int v, int visited[], LGraph_Printf* pFunc)
{
LinkQueue* queue = LinkQueue_Create();
if( queue != NULL )
{
LinkQueue_Append(queue, graph->v + v);
visited[v] = 1;
while( LinkQueue_Length(queue) > 0 )
{
int i = 0;
v = (LVertex**)LinkQueue_Retrieve(queue) - graph->v;
pFunc(graph->v[v]);
printf(", ");
for(i=0; i<LinkList_Length(graph->la[v]); i++)
{
TListNode* node = (TListNode*)LinkList_Get(graph->la[v], i);
if( !visited[node->v] )
{
LinkQueue_Append(queue, graph->v + node->v);
visited[node->v] = 1;
}
}
}
}
LinkQueue_Destroy(queue);
}
LGraph* LGraph_Create(LVertex** v, int n) // O(n)
{
TLGraph* ret = NULL;
int ok = 1;
if( (v != NULL ) && (n > 0) )
{
ret = (TLGraph*)malloc(sizeof(TLGraph));
if( ret != NULL )
{
ret->count = n;
ret->v = (LVertex**)calloc(n, sizeof(LVertex*));
ret->la = (LinkList**)calloc(n, sizeof(LinkList*));
ok = (ret->v != NULL) && (ret->la != NULL);
if( ok )
{
int i = 0;
for(i=0; i<n; i++)
{
ret->v[i] = v[i];
}
for(i=0; (i<n) && ok; i++)
{
ok = ok && ((ret->la[i] = LinkList_Create()) != NULL);
}
}
if( !ok )
{
if( ret->la != NULL )
{
int i = 0;
for(i=0; i<n; i++)
{
LinkList_Destroy(ret->la[i]);
}
}
free(ret->la);
free(ret->v);
free(ret);
ret = NULL;
}
}
}
return ret;
}
void LGraph_Destroy(LGraph* graph) // O(n*n)
{
TLGraph* tGraph = (TLGraph*)graph;
LGraph_Clear(tGraph);
if( tGraph != NULL )
{
int i = 0;
for(i=0; i<tGraph->count; i++)
{
LinkList_Destroy(tGraph->la[i]);
}
free(tGraph->la);
free(tGraph->v);
free(tGraph);
}
}
void LGraph_Clear(LGraph* graph) // O(n*n)
{
TLGraph* tGraph = (TLGraph*)graph;
if( tGraph != NULL )
{
int i = 0;
for(i=0; i<tGraph->count; i++)
{
while( LinkList_Length(tGraph->la[i]) > 0 )
{
free(LinkList_Delete(tGraph->la[i], 0));
}
}
}
}
int LGraph_AddEdge(LGraph* graph, int v1, int v2, int w) // O(1)
{
TLGraph* tGraph = (TLGraph*)graph;
TListNode* node = NULL;
int ret = (tGraph != NULL);
ret = ret && (0 <= v1) && (v1 < tGraph->count);
ret = ret && (0 <= v2) && (v2 < tGraph->count);
ret = ret && (0 < w) && ((node = (TListNode*)malloc(sizeof(TListNode))) != NULL);
if( ret )
{
node->v = v2;
node->w = w;
LinkList_Insert(tGraph->la[v1], (LinkListNode*)node, 0);
}
return ret;
}
int LGraph_RemoveEdge(LGraph* graph, int v1, int v2) // O(n*n)
{
TLGraph* tGraph = (TLGraph*)graph;
int condition = (tGraph != NULL);
int ret = 0;
condition = condition && (0 <= v1) && (v1 < tGraph->count);
condition = condition && (0 <= v2) && (v2 < tGraph->count);
if( condition )
{
TListNode* node = NULL;
int i = 0;
for(i=0; i<LinkList_Length(tGraph->la[v1]); i++)
{
node = (TListNode*)LinkList_Get(tGraph->la[v1], i);
if( node->v == v2)
{
ret = node->w;
LinkList_Delete(tGraph->la[v1], i);
free(node);
break;
}
}
}
return ret;
}
int LGraph_GetEdge(LGraph* graph, int v1, int v2) // O(n*n)
{
TLGraph* tGraph = (TLGraph*)graph;
int condition = (tGraph != NULL);
int ret = 0;
condition = condition && (0 <= v1) && (v1 < tGraph->count);
condition = condition && (0 <= v2) && (v2 < tGraph->count);
if( condition )
{
TListNode* node = NULL;
int i = 0;
for(i=0; i<LinkList_Length(tGraph->la[v1]); i++)
{
node = (TListNode*)LinkList_Get(tGraph->la[v1], i);
if( node->v == v2)
{
ret = node->w;
break;
}
}
}
return ret;
}
int LGraph_TD(LGraph* graph, int v) // O(n*n*n)
{
TLGraph* tGraph = (TLGraph*)graph;
int condition = (tGraph != NULL);
int ret = 0;
condition = condition && (0 <= v) && (v < tGraph->count);
if( condition )
{
int i = 0;
int j = 0;
for(i=0; i<tGraph->count; i++)
{
for(j=0; j<LinkList_Length(tGraph->la[i]); j++)
{
TListNode* node = (TListNode*)LinkList_Get(tGraph->la[i], j);
if( node->v == v )
{
ret++;
}
}
}
ret += LinkList_Length(tGraph->la[v]);
}
return ret;
}
int LGraph_VertexCount(LGraph* graph) // O(1)
{
TLGraph* tGraph = (TLGraph*)graph;
int ret = 0;
if( tGraph != NULL )
{
ret = tGraph->count;
}
return ret;
}
int LGraph_EdgeCount(LGraph* graph) // O(n)
{
TLGraph* tGraph = (TLGraph*)graph;
int ret = 0;
if( tGraph != NULL )
{
int i = 0;
for(i=0; i<tGraph->count; i++)
{
ret += LinkList_Length(tGraph->la[i]);
}
}
return ret;
}
void LGraph_DFS(LGraph* graph, int v, LGraph_Printf* pFunc)
{
TLGraph* tGraph = (TLGraph*)graph;
int* visited = NULL;
int condition = (tGraph != NULL);
condition = condition && (0 <= v) && (v < tGraph->count);
condition = condition && (pFunc != NULL);
condition = condition && ((visited = (int*)calloc(tGraph->count, sizeof(int))) != NULL);
if( condition )
{
int i = 0;
recursive_dfs(tGraph, v, visited, pFunc);
for(i=0; i<tGraph->count; i++)
{
if( !visited[i] )
{
recursive_dfs(tGraph, i, visited, pFunc);
}
}
printf("\n");
}
free(visited);
}
void LGraph_BFS(LGraph* graph, int v, LGraph_Printf* pFunc)
{
TLGraph* tGraph = (TLGraph*)graph;
int* visited = NULL;
int condition = (tGraph != NULL);
condition = condition && (0 <= v) && (v < tGraph->count);
condition = condition && (pFunc != NULL);
condition = condition && ((visited = (int*)calloc(tGraph->count, sizeof(int))) != NULL);
if( condition )
{
int i = 0;
bfs(tGraph, v, visited, pFunc);
for(i=0; i<tGraph->count; i++)
{
if( !visited[i] )
{
bfs(tGraph, i, visited, pFunc);
}
}
printf("\n");
}
free(visited);
}
void LGraph_Display(LGraph* graph, LGraph_Printf* pFunc) // O(n*n*n)
{
TLGraph* tGraph = (TLGraph*)graph;
if( (tGraph != NULL) && (pFunc != NULL) )
{
int i = 0;
int j = 0;
for(i=0; i<tGraph->count; i++)
{
printf("%d:", i);
pFunc(tGraph->v[i]);
printf(" ");
}
printf("\n");
for(i=0; i<tGraph->count; i++)
{
for(j=0; j<LinkList_Length(tGraph->la[i]); j++)
{
TListNode* node = (TListNode*)LinkList_Get(tGraph->la[i], j);
printf("<");
pFunc(tGraph->v[i]);
printf(", ");
pFunc(tGraph->v[node->v]);
printf(", %d", node->w);
printf(">");
printf(" ");
}
}
printf("\n");
}
}
4.#ifndef _LINKQUEUE_H_
#define _LINKQUEUE_H_
typedef void LinkQueue;
LinkQueue* LinkQueue_Create();
void LinkQueue_Destroy(LinkQueue* queue);
void LinkQueue_Clear(LinkQueue* queue);
int LinkQueue_Append(LinkQueue* queue, void* item);
void* LinkQueue_Retrieve(LinkQueue* queue);
void* LinkQueue_Header(LinkQueue* queue);
int LinkQueue_Length(LinkQueue* queue);
#endif
5.#include <malloc.h>
#include <stdio.h>
#include "LinkQueue.h"
typedef struct _tag_LinkQueueNode TLinkQueueNode;
struct _tag_LinkQueueNode
{
TLinkQueueNode* next;
void* item;
};
typedef struct _tag_LinkQueue
{
TLinkQueueNode* front;
TLinkQueueNode* rear;
int length;
} TLinkQueue;
LinkQueue* LinkQueue_Create() // O(1)
{
TLinkQueue* ret = (TLinkQueue*)malloc(sizeof(TLinkQueue));
if( ret != NULL )
{
ret->front = NULL;
ret->rear = NULL;
ret->length = 0;
}
return ret;
}
void LinkQueue_Destroy(LinkQueue* queue) // O(n)
{
LinkQueue_Clear(queue);
free(queue);
}
void LinkQueue_Clear(LinkQueue* queue) // O(n)
{
while( LinkQueue_Length(queue) > 0 )
{
LinkQueue_Retrieve(queue);
}
}
int LinkQueue_Append(LinkQueue* queue, void* item) // O(1)
{
TLinkQueue* sQueue = (TLinkQueue*)queue;
TLinkQueueNode* node = (TLinkQueueNode*)malloc(sizeof(TLinkQueueNode));
int ret = (sQueue != NULL ) && (item != NULL) && (node != NULL);
if( ret )
{
node->item = item;
if( sQueue->length > 0 )
{
sQueue->rear->next = node;
sQueue->rear = node;
node->next = NULL;
}
else
{
sQueue->front = node;
sQueue->rear = node;
node->next = NULL;
}
sQueue->length++;
}
if( !ret )
{
free(node);
}
return ret;
}
void* LinkQueue_Retrieve(LinkQueue* queue) // O(1)
{
TLinkQueue* sQueue = (TLinkQueue*)queue;
TLinkQueueNode* node = NULL;
void* ret = NULL;
if( (sQueue != NULL) && (sQueue->length > 0) )
{
node = sQueue->front;
sQueue->front = node->next;
ret = node->item;
free(node);
sQueue->length--;
if( sQueue->length == 0 )
{
sQueue->front = NULL;
sQueue->rear = NULL;
}
}
return ret;
}
void* LinkQueue_Header(LinkQueue* queue) // O(1)
{
TLinkQueue* sQueue = (TLinkQueue*)queue;
void* ret = NULL;
if( (sQueue != NULL) && (sQueue->length > 0) )
{
ret = sQueue->front->item;
}
return ret;
}
int LinkQueue_Length(LinkQueue* queue) // O(1)
{
TLinkQueue* sQueue = (TLinkQueue*)queue;
int ret = -1;
if( sQueue != NULL )
{
ret = sQueue->length;
}
return ret;
}
6.#ifndef _LINKLIST_H_
#define _LINKLIST_H_
typedef void LinkList;
typedef struct _tag_LinkListNode LinkListNode;
struct _tag_LinkListNode
{
LinkListNode* next;
};
LinkList* LinkList_Create();
void LinkList_Destroy(LinkList* list);
void LinkList_Clear(LinkList* list);
int LinkList_Length(LinkList* list);
int LinkList_Insert(LinkList* list, LinkListNode* node, int pos);
LinkListNode* LinkList_Get(LinkList* list, int pos);
LinkListNode* LinkList_Delete(LinkList* list, int pos);
#endif
7.#include <stdio.h>
#include <malloc.h>
#include "LinkList.h"
typedef struct _tag_LinkList
{
LinkListNode header;
int length;
} TLinkList;
LinkList* LinkList_Create() // O(1)
{
TLinkList* ret = (TLinkList*)malloc(sizeof(TLinkList));
if( ret != NULL )
{
ret->length = 0;
ret->header.next = NULL;
}
return ret;
}
void LinkList_Destroy(LinkList* list) // O(1)
{
free(list);
}
void LinkList_Clear(LinkList* list) // O(1)
{
TLinkList* sList = (TLinkList*)list;
if( sList != NULL )
{
sList->length = 0;
sList->header.next = NULL;
}
}
int LinkList_Length(LinkList* list) // O(1)
{
TLinkList* sList = (TLinkList*)list;
int ret = -1;
if( sList != NULL )
{
ret = sList->length;
}
return ret;
}
int LinkList_Insert(LinkList* list, LinkListNode* node, int pos) // O(n)
{
TLinkList* sList = (TLinkList*)list;
int ret = (sList != NULL) && (pos >= 0) && (node != NULL);
int i = 0;
if( ret )
{
LinkListNode* current = (LinkListNode*)sList;
for(i=0; (i<pos) && (current->next != NULL); i++)
{
current = current->next;
}
node->next = current->next;
current->next = node;
sList->length++;
}
return ret;
}
LinkListNode* LinkList_Get(LinkList* list, int pos) // O(n)
{
TLinkList* sList = (TLinkList*)list;
LinkListNode* ret = NULL;
int i = 0;
if( (sList != NULL) && (0 <= pos) && (pos < sList->length) )
{
LinkListNode* current = (LinkListNode*)sList;
for(i=0; i<pos; i++)
{
current = current->next;
}
ret = current->next;
}
return ret;
}
LinkListNode* LinkList_Delete(LinkList* list, int pos) // O(n)
{
TLinkList* sList = (TLinkList*)list;
LinkListNode* ret = NULL;
int i = 0;
if( (sList != NULL) && (0 <= pos) && (pos < sList->length) )
{
LinkListNode* current = (LinkListNode*)sList;
for(i=0; i<pos; i++)
{
current = current->next;
}
ret = current->next;
current->next = ret->next;
sList->length--;
}
return ret;
}