#include <stdio.h> #include <stdlib.h> #define MAX_VERTEX_NUM 100 // 最大顶点数 #define FALSE 0 #define TRUE 1 // 邻接表结构体 typedef struct ArcNode{ int adjvex; struct ArcNode *nextarc; }ArcNode; typedef struct VNode{ int data; ArcNode *firstarc; }VNode, AdjList[MAX_VERTEX_NUM]; typedef struct{ AdjList vertices; int vexnum, arcnum; // 顶点数和边数 }ALGraph; // 初始化邻接表 void InitALGraph(ALGraph *G) { int i; G->vexnum = G->arcnum = 0; for(i = 0; i < MAX_VERTEX_NUM; i++){ G->vertices[i].firstarc = NULL; } } // 添加顶点 void AddVertex(ALGraph *G, int v) { if(G->vexnum == MAX_VERTEX_NUM){ printf("Error: Vertex number exceeds maximum.\n"); return; } G->vertices[G->vexnum].data = v; G->vexnum++; } // 添加边 void AddArc(ALGraph *G, int v1, int v2) { if(G->arcnum >= MAX_VERTEX_NUM * (MAX_VERTEX_NUM - 1) / 2){ printf("Error: Arc number exceeds maximum.\n"); return; } ArcNode *p = (ArcNode *)malloc(sizeof(ArcNode)); p->adjvex = v2; p->nextarc = G->vertices[v1].firstarc; G->vertices[v1].firstarc = p; G->arcnum++; } // DFS遍历 void DFS(ALGraph *G, int v, int *visited) { printf("%d ", G->vertices[v].data); visited[v] = TRUE; ArcNode *p = G->vertices[v].firstarc; while(p != NULL){ int w = p->adjvex; if(!visited[w]){ DFS(G, w, visited); } p = p->nextarc; } } // BFS遍历 void BFS(ALGraph *G, int v, int *visited) { int queue[MAX_VERTEX_NUM]; int front = -1, rear = -1; printf("%d ", G->vertices[v].data); visited[v] = TRUE; queue[++rear] = v; while(front != rear){ int w = queue[++front]; ArcNode *p = G->vertices[w].firstarc; while(p != NULL){ int u = p->adjvex; if(!visited[u]){ printf("%d ", G->vertices[u].data); visited[u] = TRUE; queue[++rear] = u; } p = p->nextarc; } } } int main() { ALGraph G; InitALGraph(&G); // 添加顶点 AddVertex(&G, 1); AddVertex(&G, 2); AddVertex(&G, 3); AddVertex(&G, 4); AddVertex(&G, 5); // 添加边 AddArc(&G, 0, 1); AddArc(&G, 0, 2); AddArc(&G, 1, 3); AddArc(&G, 1, 4); AddArc(&G, 2, 4); // 输出深度优先序列 int visited[MAX_VERTEX_NUM] = {FALSE}; printf("DFS: "); DFS(&G, 0, visited); printf("\n"); // 输出广度优先序列 int visited2[MAX_VERTEX_NUM] = {FALSE}; printf("BFS: "); BFS(&G, 0, visited2); printf("\n"); return 0; } 修改代码，使其能输出图的可视化输出图

要输出图的可视化输出图，需要使用图形库或工具，例如Graphviz。以下是修改后的代码，可以输出Graphviz所需的DOT格式的图形描述语言，通过复制到Graphviz的在线编辑器或使用本地Graphviz软件处理后，即可生成图形化的图像。

#include <stdio.h>
#include <stdlib.h>
#define MAX_VERTEX_NUM 100 // 最大顶点数
#define FALSE 0
#define TRUE 1

// 邻接表结构体
typedef struct ArcNode{
    int adjvex;
    struct ArcNode *nextarc;
}ArcNode;

typedef struct VNode{
    int data;
    ArcNode *firstarc;
}VNode, AdjList[MAX_VERTEX_NUM];

typedef struct{
    AdjList vertices;
    int vexnum, arcnum; // 顶点数和边数
}ALGraph;

// 初始化邻接表
void InitALGraph(ALGraph *G) {
    int i;
    G->vexnum = G->arcnum = 0;
    for(i = 0; i < MAX_VERTEX_NUM; i++){
        G->vertices[i].firstarc = NULL;
    }
}

// 添加顶点
void AddVertex(ALGraph *G, int v) {
    if(G->vexnum == MAX_VERTEX_NUM){
        printf("Error: Vertex number exceeds maximum.\n");
        return;
    }
    G->vertices[G->vexnum].data = v;
    G->vexnum++;
}

// 添加边
void AddArc(ALGraph *G, int v1, int v2) {
    if(G->arcnum >= MAX_VERTEX_NUM * (MAX_VERTEX_NUM - 1) / 2){
        printf("Error: Arc number exceeds maximum.\n");
        return;
    }
    ArcNode *p = (ArcNode *)malloc(sizeof(ArcNode));
    p->adjvex = v2;
    p->nextarc = G->vertices[v1].firstarc;
    G->vertices[v1].firstarc = p;
    G->arcnum++;
}

// DFS遍历
void DFS(ALGraph *G, int v, int *visited) {
    printf("%d ", G->vertices[v].data);
    visited[v] = TRUE;
    ArcNode *p = G->vertices[v].firstarc;
    while(p != NULL){
        int w = p->adjvex;
        if(!visited[w]){
            DFS(G, w, visited);
        }
        p = p->nextarc;
    }
}

// BFS遍历
void BFS(ALGraph *G, int v, int *visited) {
    int queue[MAX_VERTEX_NUM];
    int front = -1, rear = -1;
    printf("%d ", G->vertices[v].data);
    visited[v] = TRUE;
    queue[++rear] = v;
    while(front != rear){
        int w = queue[++front];
        ArcNode *p = G->vertices[w].firstarc;
        while(p != NULL){
            int u = p->adjvex;
            if(!visited[u]){
                printf("%d ", G->vertices[u].data);
                visited[u] = TRUE;
                queue[++rear] = u;
            }
            p = p->nextarc;
        }
    }
}

// 输出Graphviz所需的DOT格式的图形描述语言
void OutputGraphviz(ALGraph *G) {
    printf("digraph G {\n");
    int i;
    for(i = 0; i < G->vexnum; i++){
        printf("    %d;\n", G->vertices[i].data);
        ArcNode *p = G->vertices[i].firstarc;
        while(p != NULL){
            printf("    %d -> %d;\n", G->vertices[i].data, G->vertices[p->adjvex].data);
            p = p->nextarc;
        }
    }
    printf("}\n");
}

int main() {
    ALGraph G;
    InitALGraph(&G);

    // 添加顶点
    AddVertex(&G, 1);
    AddVertex(&G, 2);
    AddVertex(&G, 3);
    AddVertex(&G, 4);
    AddVertex(&G, 5);

    // 添加边
    AddArc(&G, 0, 1);
    AddArc(&G, 0, 2);
    AddArc(&G, 1, 3);
    AddArc(&G, 1, 4);
    AddArc(&G, 2, 4);

    // 输出深度优先序列
    int visited[MAX_VERTEX_NUM] = {FALSE};
    printf("DFS: ");
    DFS(&G, 0, visited);
    printf("\n");

    // 输出广度优先序列
    int visited2[MAX_VERTEX_NUM] = {FALSE};
    printf("BFS: ");
    BFS(&G, 0, visited2);
    printf("\n");

    // 输出Graphviz所需的DOT格式的图形描述语言
    OutputGraphviz(&G);

    return 0;
}