图的深度优先遍历递归算法（输出到文件）

图的深度优先遍历递归算法（输出到文件）----C语言实现

#include <stdio.h>
#define MaxVex  100            //最大顶点数
#define MaxNum 65535        //表示∞
#define TRUE 1
#define FALSE 0
typedef char VertexType;    //顶点类型
typedef int EdgeType;    //权值类型
typedef int Bool;
Bool visited[MaxVex];
typedef struct {
    VertexType    vexs[MaxVex];            //顶点数组
    EdgeType    arc[MaxVex][MaxVex];    //邻接矩阵
    int    numVertexes, numEdges;            //当前图中的结点数以及边数
}MGraph;
//建立图的邻接矩阵
void CreateMGraph(MGraph *G)
{
    int i, j, k, w;
    printf("输入顶点数和边数: ");
    scanf("%d%d", &G->numVertexes,&G->numEdges);
    fflush(stdin);//清空缓冲区，并且可以换行 
    printf("==============================\n");
    printf("输入各个顶点:\n");
    for (i=0; i<G->numVertexes; ++i)
    {
        printf("顶点%d: ",i+1);
        scanf("%c", &G->vexs[i]);
        fflush(stdin);
    }
 
    for (i=0; i<G->numVertexes; ++i)
    {
        for (j=0; j<G->numVertexes; ++j)
            G->arc[i][j] = MaxNum;
    }
 
    printf("==============================\n");
    for (k=0; k<G->numEdges; ++k)
    {
        printf("输入边(vi, vj)中的下标i和j和权W: ");
        scanf("%d%d%d", &i,&j,&w);
        G->arc[i][j] = w;
        G->arc[j][i] = G->arc[i][j];
    }
}
//图的深度优先遍历
void DFS(MGraph G, int i)
{
	FILE *pf;
	pf=fopen("333.txt","a+");
    int j;
    visited[i] = TRUE;
    fprintf(pf,"%c ",G.vexs[i]);
    printf("%c ", G.vexs[i]);
    for (j=0; j<G.numVertexes; ++j)
    {
        if (G.arc[i][j]!=MaxNum  &&  !visited[j])
            DFS(G, j);
    }
}
 
void DFSTraverse(MGraph G)
{
    int i;
    for (i=0; i<G.numVertexes; ++i)
        visited[i] = FALSE;
 
    for (i=0; i<G.numVertexes; ++i)
    {
        if (!visited[i])
            DFS(G, i);
    }
 
}
//程序入口
int main(){
	FILE *pf;
	pf=fopen("333.txt","w");
    MGraph G;
    CreateMGraph(&G);
    printf("\n图的深度优先遍历为: ");
    DFSTraverse(G);    
    return 0;
}