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第七次作业广度优先遍历最短路径 #143

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221 changes: 221 additions & 0 deletions 2017-1/zjc/第七次作业/main.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,221 @@
#include<stdio.h>
#include<stdlib.h>
#include <malloc.h>

#define INFINITY INT_MAX //���ֵΪ����
#define MAX_VERTEX_NUM 20 //��󶥵���

typedef enum {
DG,DN,UGD,UDN
}GraphKind;//{����ͼ��������������ͼ��������}

typedef int VRType, InfoType;

typedef struct ArcCell {
VRType adj;//VRType�Ƕ����ϵ���ͣ�����Ȩͼ����1��0
//��ʾ���ڷ񣻶���Ȩͼ����ΪȨֵ����
InfoType *info;//�û������Ϣ��ָ��
}ArcCell,AdjMatrix[MAX_VERTEX_NUM][MAX_VERTEX_NUM];

typedef struct {
AdjMatrix arcs; // �ڽӾ���
int vexnum, arcnum; // ͼ�ĵ�ǰ�������ͻ���
}Graph;

typedef enum {
OK,
ERROR,
OVERFLOW
}Status;

Status CreateGraph(Graph *G) {
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虽然就题论题你这里这样写是能得到正确答案的,但建议以后在实际应用编程时,尽量把这种参数配置类的工作交给调用者(函数)在调用函数时执行传参操作,代码的封装可复用就会一点点积累起来了。

//�����ڽӾ��󷨱�ʾ����������֪��ͼ
G->vexnum = 9; //��ͼ�Ķ�����
G->arcnum = 12; //��ͼ�Ļ���
for (int i = 0; i < G->vexnum; i++) {
for (int j = 0; j < G->vexnum; j++) {
G->arcs[i][j].adj = INFINITY; //��ʼ���ڽӾ���,INFINITY��ʾ������
}
}//��ʼ��ͼ
//���ڵĶ��㸳ֵ
Add(G, 0, 1); Add(G, 0, 2); Add(G, 0, 3); Add(G, 0, 6);
Add(G, 1, 2); Add(G, 3, 4); Add(G, 3, 5); Add(G, 4, 5);
Add(G, 5, 7); Add(G, 6, 7); Add(G, 6, 8); Add(G, 7, 8);
//��ʾ0-1,0-2.��������������
return OK;
}

Status Add(Graph*G, int x, int y) {
//�����ڽӾ������ڸ�ֵΪ1
if (x >= MAX_VERTEX_NUM || y >= MAX_VERTEX_NUM) {
return ERROR;//��������ͼ�ķ�Χ���ͷ���ERROR
}
G->arcs[x][y].adj = G->arcs[y][x].adj = 1;//����ͼ�����ڽӶ�Ϊ1���ҵ���������ʱ��������ֵ
return OK;
}
/*-------------ͼ������------------------*/

typedef int ElemType;

#define MAXQSIZE 100 //��������

typedef struct QNode {
ElemType data;
struct QNode *priou;//�ڵ����һ���ڵ�
struct QNode *next;//�ڵ����һ���ڵ�
}QNode, LinkList, *QueuePtr;

typedef struct {
QueuePtr front;//ǰ���
QueuePtr rear;//�����
}LinkQueue;

Status InitQueue(LinkQueue *Q) {
//���еij�ʼ��
Q->front = Q->rear = (QueuePtr)malloc(MAXQSIZE * sizeof(QNode));
if (!(Q->front)) {
return ERROR;
}
Q->front->next = Q->rear->next = NULL;//ʹ����Ϊ��
return OK;
}

Status EnQueue(LinkQueue *Q, ElemType e) {
//����еIJ���
QueuePtr p;
p = (QueuePtr)malloc(sizeof(QNode));
if (!p) {
return ERROR;
}
p->data = e;//���浽�����������
p->next = NULL;//��һ���ڵ�Ϊ��
p->priou = Q->front;
Q->rear->next = p;
Q->rear = p;
return OK;
}

Status DeQueue(LinkQueue *Q, ElemType *e) {
//�������
if (QueueEmpty(*Q)) {
//����Ϊ��ʱֹͣ����������ERROR
return ERROR;
}
Q->front = Q->front->next;//ͷ���ָ��������һ���ڵ�
*e = Q->front->data;
return OK;
}

typedef enum {
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所有代码都在一个文件里已经比较拥挤了,建议把所有的数据结构定义都前置在源代码文件的最开始处,起码不会像现在这样有点凌乱

false,
true
}bool;

bool QueueEmpty(LinkQueue Q) {
//�ж����Dz���һ���ն���
if (Q.front == Q.rear) {
return true;//ͷ���ͺ�һ���ڵ�Ϊͬһ������ô�������Ϊ��
}
return false;//������в�Ϊ��
}

int FirstAdjVex(Graph G, int i) {
//���ص�һ���ڽӶ��㣬û�еĻ�����-1
for (int k = 0; k < G.vexnum; k++) {
if (G.arcs[i][k].adj == 1) {
return k;//������ڽӽڵ㣬��������ڽӵĽڵ�
}
}
return -1;
}

int NextAdjVex(Graph G, int i, int j) {
//������һ���ڽӶ��㣬û�еĻ�����-1
for (int k = j + 1; k < G.vexnum; k++) {
if (G.arcs[i][k].adj == 1) {
return k;
}
}
return -1;
}
/*----------------���еIJ���------------*/
#define FALSE 0
#define TRUE 1

int visited[MAX_VERTEX_NUM];

void BFSTraverse(Graph G, int a, int b) {
//��������ȵķǵݹ����ͼG��ʹ�ø�������Q�ͷ��ʱ�־����visited.
LinkQueue Q; //��������
for (int v = 0; v < G.vexnum; ++v) {
visited[v] = FALSE; //��ʼ�����ʱ�־
}
InitQueue(&Q); // �ÿյĸ�������Q
EnQueue(&Q, a); //�������
visited[a] = TRUE;
bool flag = false;
int u, w;
while (!QueueEmpty(Q)) //���в�Ϊ��ʱִ��
{
DeQueue(&Q, &u);//�������
for (w = FirstAdjVex(G, u); w >= 0; w = NextAdjVex(G, u, w))
{
//���ν����ڶ�������
if (w == b) {
EnQueue(&Q, w); //������
PrintFoot(Q, a); //���·��
flag = true;
break;
}//if
if (!visited[w]) {
//wΪu��δ���ʵ��ڽӶ���
EnQueue(&Q, w); //�����
visited[w] = true;
}//if
}//for
if (flag) {
break;
}//if
}//while
}//BFSTraverse
/*---------ͼ�ı���--------------*/

Status PrintFoot(LinkQueue Q, int start) {
//������·��
int foot[MAX_VERTEX_NUM];///��󶥵���
int i;
QueuePtr p;//����һ������
p = Q.rear;//pָ���β�ڵ�
for (i = 0; i < MAX_VERTEX_NUM; i++) {
foot[i] = -1;
}//���еij�ʼ��
foot[0] = p->data;
p = p->priou;
for (i = 1; p->data != start; i++) {
foot[i] = p->data;
p = p->priou;
}
foot[i] = p->data;
for (; i >= 0; i--) {
//�������
if (foot[i] >= 0) {
printf("%d ", foot[i] + 1);
}
}
}

int main()
{
Graph G;
CreateGraph(&G);//����һ��ͼͼ�����ҳ�ʼ����1
for (int i = 0; i < 9; i++) {
for (int j = 0; j < 9; j++) {
if (j != i) {
printf("%d<->%d:", i + 1, j + 1);
BFSTraverse(G, i, j);//��ȱ���
printf("\n");
}//if
}//for j
}//for i
return 0;
}
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