#include<stdio.h>#include<stdlib.h>#define MAX_VER_NUM 50typedef char VertexType;typedef enum{ DG,UDG}GraphType;typedef struct{ VertexType vexs[MAX_VER_NUM]; //頂點向量 int arcs[MAX_VER_NUM][MAX_VER_NUM]; //鄰接矩陣 int vexnum,arcnum;   //圖的當前頂點數和弧數 GraphType type;   //圖的種類標志}MGraph;  //根據名稱得到指定頂點在頂點集合中的下標//vex 頂點//return 如果找到，則返回下標，否則，返回0int getIndexOfVexs(char vex,MGraph *MG){ int i; for(i=1;i<=MG->vexnum;i++) { if(MG->vexs[i]==vex) { return i; } } return 0;} //創建鄰接矩陣void create_MG(MGraph *MG){ int i,j,k; int v1,v2,type; char c1,c2; printf("Please input graph type DG(0) or UDG(1):"); scanf("%d",&type); if(type==0) { MG->type=DG; } else if(type==1) { MG->type=UDG; } else { printf("Please input correct graph type DG(0) or UDG(1)!"); return; } printf("Please input vexnum:"); scanf("%d",&MG->vexnum); printf("Please input arcnum:"); scanf("%d",&MG->arcnum); getchar(); for(i=1;i<=MG->vexnum;i++) { printf("Please input %dth vex(char):",i); scanf("%c",&MG->vexs[i]); getchar(); } //初始化鄰接矩陣 for(i=1;i<=MG->vexnum;i++) { for (j=1;j<=MG->vexnum;j++) { MG->arcs[i][j]=0; } } //輸入邊的信息，建立鄰接矩陣 for(k=1;k<=MG->arcnum;k++) { printf("Please input %dth arc v1(char) v2(char):",k); scanf("%c %c",&c1,&c2); v1=getIndexOfVexs(c1,MG); v2=getIndexOfVexs(c2,MG); if(MG->type==-1) { MG->arcs[v1][v2]=MG->arcs[v2][v1]=1; } else { MG->arcs[v1][v2]=1; } getchar(); }} //打印鄰接矩陣和頂點信息void print_MG(MGraph MG){ int i,j; if(MG.type==DG) { printf("Graph type: Direct graph/n"); } else { printf("Graph type: Undirect graph/n"); } printf("Graph vertex number: %d/n",MG.vexnum); printf("Graph arc number: %d/n",MG.arcnum); printf("Vertex set:"); for(i=1;i<=MG.vexnum;i++) { printf("%c",MG.vexs[i]); } printf("/nAdjacency Matrix:/n"); for(i=1;i<=MG.vexnum;i++) { for(j=1;j<=MG.vexnum;j++) { printf("%d",MG.arcs[i][j]); } printf("/n"); }} //主函數int main(void){ MGraph MG; create_MG(&MG); print_MG(MG); return 0;}