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#include<stdio.h>
/***********************
功能:输出所有的功能目录
输入:选择的功能编号
输出返回一个值给main函数
***********************/
int menu()
{ int c;
int flag;
do
{
flag=1;
printf(" ┏━━━━━━━━━━━━━━━━━━━━┓\n");
printf(" ┃ 1.选择出发点和目的地 ┃\n");
printf(" ┃ 2.查看城市信息 ┃\n");
printf(" ┃ 3.修改城市信息 ┃\n");
printf(" ┃ 4.增加城市信息 ┃\n");
printf(" ┃ 5.输出所有城市信息 ┃\n");
printf(" ┃ 6.输出单源路径 ┃\n");
printf(" ┃ 7.DFS遍历输出 ┃\n");
printf(" ┃ 8.删除节点 ┃\n");
printf(" ┃ 9.退出系统 ┃\n");
printf(" ┗━━━━━━━━━━━━━━━━━━━━┛\n");
printf(" 请输入您的选择\n");
scanf("%d",&c);
if(c==1||c==2||c==3||c==4||c==5||c==6||c==7||c==8||c==9)
flag=0;
} while(flag);
return c;
}