程序代码：

 #include<stdio.h>

 #include<stdlib.h>

 int my_menu()

 { int  num;
  system("cls");
  printf("1. Input records\n");
  printf("2. Display all records\n");
  printf("3. Delete a record\n");
  printf("4. sort\n");
  printf("5. Insert a record\n");
  printf("6. Query\n");
  printf("7. Add records from a Text File\n");
  printf("8. Write to a Text File\n");
  printf("9. research records\n");
  printf("0. Quit\n");
  printf("Please input the number(0~9):");
  scanf("%d",&num);
  while(num<0||num>9)     //如果输入数字不在0到9之间，则重新输入//
    { 
      printf("输入错误，请重新输入！！！ \n");
      system("pause");
      exit(3);
    }
  return(num);

 }

 main()

 {                   

  int i;
  for(i=0;;i++)
  {
    switch(my_menu())      //进入菜单，进行选择//
    {
    case(1):  {
                system("pause");
                 break;
              }
    case(2):  {
       
               system("pause");
               break;
              }
    case(3):  {
               printf("Please input the name to delete the record:");
             
               break;
              }
    case(4):
              printf("正在排序中···");
              system("pause");   
              break;
    case(5):
              system("pause");        
              break;
    case(6):           
              printf("查无此人!!!\n");
              system("pause");         
              break;
    case(7):
              system("pause");   
              break;
    case(8):
              system("pause");
              break;
    case(9):
              system("pause");
              break;
    case(0):{
              printf("正在关闭程序......\n");     
              system("pause");
              exit(0);
            }
    }
  }


 }