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发表于 2023-12-12 21:10:25
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老哥谢谢你,之前在网上看了半天网课,没看懂图到底讲啥,要怎么编,直到看到了你的程序,醍醐灌顶。
下面这个是我在基础你程序的基础上我自己做的一点小改进
- #include <stdio.h>
- #include <stdlib.h>
- typedef int ElemType;
- typedef struct Queue
- {
- ElemType data;
- Queue *Qnode;
- } Queue;
- typedef struct graph
- {
- ElemType *v;
- ElemType **p;
- ElemType *stack;
- Queue *Qhead;
- Queue *Qtail;
- } graph;
- void Initialization(graph *ch, ElemType n);
- void create(graph *ch, ElemType n);
- void enqueue(graph *ch, int nn);
- int outqueue(graph *ch);
- void widevisit(graph *ch, ElemType nn, ElemType n);
- void depthvisit(graph *ch, ElemType nn, ElemType n);
- void input(int *n, int *nn, int *option);
- void freeG(graph *ch, int n);
- int main(void)
- {
- int n, nn, option;
- graph p;
- input(&n, &nn, &option);
- Initialization(&p, n);
- create(&p, n);
- option ? widevisit(&p, nn, n) : depthvisit(&p, nn, n);
- freeG(&p, n);
- system("pause");
- return 0;
- }
- void Initialization(graph *ch, ElemType n)
- {
- ch->p = (ElemType **)malloc(sizeof(ElemType *) * (n + 1));
- for (int i = 0; i <= n; i++)
- {
- ch->p[i] = (ElemType *)malloc(sizeof(ElemType) * (n + 1));
- }
- ch->v = (ElemType *)malloc(sizeof(ElemType) * (n + 1));
- ch->stack = (ElemType *)malloc(sizeof(ElemType) * (n + 1));
- for (int i = 0; i <= n; i++)
- {
- ch->v[i] = 0;
- ch->stack[i] = 0;
- }
- ch->Qhead = ch->Qtail = NULL;
- }
- void create(graph *ch, ElemType n)
- {
- printf("请输入邻接矩阵\n");
- for (int i = 1; i <= n; i++)
- {
- for (int j = 1; j <= n; j++)
- {
- scanf("%d", &(ch->p[i][j]));
- }
- }
- }
- void enqueue(graph *ch, int nn)
- {
- Queue *p = (Queue *)malloc(sizeof(Queue));
- p->Qnode = NULL;
- p->data = nn;
- if (ch->Qhead == NULL)
- {
- ch->Qhead = ch->Qtail = p;
- }
- else
- {
- ch->Qtail->Qnode = p;
- ch->Qtail = p;
- }
- }
- int outqueue(graph *ch)
- {
- if (ch->Qhead == NULL)
- {
- return -1;
- }
- Queue *Q = ch->Qhead;
- int temp = Q->data;
- ch->Qhead = ch->Qhead->Qnode;
- if (ch->Qhead == NULL)
- {
- ch->Qtail = NULL;
- }
- free(Q);
- return temp;
- }
- void widevisit(graph *ch, ElemType nn, ElemType n)
- {
- printf("下面进行图的广度优先遍历\n");
- int node = nn;
- ch->v[nn] = 1;
- enqueue(ch, nn);
- while (ch->Qhead != NULL)
- {
- node = outqueue(ch);
- if (node != nn)
- {
- printf("->");
- }
- printf("%c", 'A' + node - 1);
- for (int i = 1; i <= n; i++)
- {
- if (ch->p[node][i] == 1 && ch->v[i] == 0)
- {
- ch->v[i] = 1;
- enqueue(ch, i);
- }
- }
- }
- putchar('\n');
- }
- void depthvisit(graph *ch, ElemType nn, ElemType n)
- {
- printf("下面进行图的深度优先遍历\n");
- int node = nn, j = 1, top = 0, found;
- ch->v[nn] = 1;
- ch->stack[top++] = nn;
- printf("%c", 'A' + nn - 1);
- while (top > 0)
- {
- found = 0;
- while (j <= n)
- {
- if (ch->p[node][j] == 1 && ch->v[j] == 0)
- {
- ch->v[j] = 1;
- ch->stack[top++] = j;
- printf("->%c", 'A' + j - 1);
- node = j;
- found = 1;
- break;
- }
- j++;
- }
- j = 1;
- if (!found)
- {
- top--;
- if (top > 0)
- {
- node = ch->stack[top - 1];
- j = ch->stack[top];
- }
- }
- }
- putchar('\n');
- }
- void input(int *n, int *nn, int *option)
- {
- while (1)
- {
- printf("下面将进行图的遍历,请选择深度优先遍历(输入0)或广度优先遍历(输入1):");
- scanf("%d", &(*option));
- if (*option == 0 || *option == 1)
- {
- break;
- }
- else
- {
- printf("您的输入有误!\n\n");
- }
- }
- do
- {
- printf("请输入结点数:");
- scanf("%d", &(*n));
- if (*n <= 0)
- {
- printf("结点数不得小于等于0!\n");
- }
- } while (*n <= 0);
- do
- {
- printf("请选择从哪个结点开始遍历:");
- scanf("%d", &(*nn));
- if (*nn < 1 || *nn > *n)
- {
- printf("您的输入不正确!\n");
- }
- } while (*nn < 1 || *nn > *n);
- }
- void freeG(graph *ch, int n)
- {
- Queue *current = ch->Qhead;
- Queue *next;
- while (current != NULL)
- {
- next = current->Qnode;
- free(current);
- current = next;
- }
- for (int i = 0; i <= n; i++)
- {
- free(ch->p[i]);
- }
- free(ch->p);
- free(ch->v);
- free(ch->stack);
- }
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