建立一个结点包括职工的编号、年龄和性别的单向链表，分别定义函

#include <iostream>
using namespace std;
struct employee
{
int num;
  int age;
  char sex;
  employee *next;
};
employee *head, *head1;
//建立单向链表
employee *create()
{
 employee *head, *p, *pend;
  char ch;
  head = NULL;
  cout << "\t输入数据?(y/n)"; cin >> ch;
  if( ch == 'y' )
  {
 p = new employee;
     cout << "\t编号:";  cin >> p->num;
     cout << "\t年龄:";  cin >> p->age;
     cout << "\t性别:";  cin >> p->sex;
}
  else
     goto L0;
  while( ch == 'y' )
  {
  if( head == NULL ) head = p;
     else pend->next = p;
     pend = p;
        cout << "\t输入数据?(y/n)"; cin>>ch;
     if( ch == 'y' )
        {
 p = new employee;
           cout << "\t编号:"; cin >> p->num;
           cout << "\t年龄:"; cin >> p->age;
           cout << "\t性别:"; cin >> p->sex;   
}
  }
  pend->next = NULL;
  L0: return head;    
}
//显示单向链表中全部职工信息
void show( employee *head )
{
 employee *p = head;
if( !head ) { cout << "\t空链表！" << endl; goto L1; }
     cout << "\t链表中的数据是: \n";
  while( p )
  {
 cout << '\t' << p->num << "," << p->age << "," << p->sex << endl;
        p = p->next;  
}
L1:
}
//统计男女职工人数
void count( employee *head )
{
 employee *p = head;
  int m, f;
  m = 0; f = 0;
  while( p )
  {
 if( p->sex == 'm' )
m++;
       else
 f++;
       p = p->next;  
}
  cout << "\t男职工人数：" << m << endl;
  cout << "\t女职工人数：" << f << endl;
}
//在链表尾部插入新结点
 employee *insert()
{
employee *pend = head, *p;
  //在空链表尾部插入新结点
  if( !head )
  {
p = new employee;
    cout << "\t编号:";  cin >> p->num;
    cout << "\t年龄:";  cin >> p->age;
    cout << "\t性别:";  cin >> p->sex;
    head = p;
    p->next = NULL;
    return head;
}
  //在链表尾部插入新结点
  while( pend->next != NULL )
  {
pend = pend->next;  
}
  p = new employee;
  cout << "\t编号:";  cin >> p->num;
  cout << "\t年龄:";  cin >> p->age;
  cout << "\t性别:";  cin >> p->sex;
  pend->next = p;
  pend = p;
  pend->next = NULL;
  return head;
}
//删除指定编号的结点
employee *del( int bh )
{
employee *p, *q;
  if ( !head )
  {
cout << "\t空链表！" << endl;
    goto L2;  
}
  //删除链首结点
  if( head->num == bh )
   {
 p = head;
     head = head->next;
        delete p;
        cout << "\t结点已被删除！" << endl;
        goto L2;
}
  //删除非链首结点
  q = head;
  while( q->next != NULL )
  {
if ( q->next->num == bh )
    {
 p = q->next;      //待删除结点
          q->next = p->next;
          delete p;
       cout << "\t结点已被删除！" << endl;
          goto L2;   
}
       q = q->next;
  }
  cout << "\t找不到需删除结点！" << endl;
L2:  return ( head );
}
//删除指定年龄段的结点，并把被删除结点保存在另一链表中
employee *delcreate()
{
 employee *p, *pd, *p1, *q;
  int flag;
  //建立新链表
  if ( head == NULL )
  {
 cout << "\t空链表！" << endl;
     goto L3;
}
  head1 = NULL;
  pd = new employee;
  p = head;
  flag = 0;
  while ( p != NULL )
  {
if( p->age >= 55 && p->age <=60 )
       {
 pd->num = p->num;
         pd->age = p->age;
         pd->sex = p->sex;
         if( head1 == NULL )
head1 = pd;
      else
p1->next = pd;
      p1 = pd;
         pd = new employee;
         flag = 1;  
}
        p = p->next;  
}
if ( flag == 0 )
  { cout << "\t没有需删除的结点！" << endl; goto L3; }
p1->next = NULL;
//显示新链表
cout <<"\t新链表中的数据是: \n";
p = head1;
while( p )
 {
 cout << '\t' << p->num << "," << p->age << "," << p->sex << endl;
   p = p->next;
}
//删除指定年龄的结点
p = head;
q = p;
while ( p != NULL )
{
 if( p->age >= 55 && p->age <= 60)
    if( head->age == p->age )
  {
pd = head;               //待删除结点
         head = head->next;
        delete pd;
        p = head;
        continue;
    }
       else
        if( p->next == NULL )
        {
 pd = p;                     //待删除结点          
          q->next = NULL;
        delete pd;
          goto L3;  
}
        else
        {
pd = p;                   //待删除结点
q->next = p->next;
delete pd;
p = q->next;
continue;
}
q = p;
p = p->next;  
}
  L3: return ( head );
}
 
int main()
{
int choice, bh ;
L:
cout << "\n\t\t请键入操作选择\n" << endl;
cout << "\t 1 ---建立单向链表" << endl;
      cout << "\t 2 ---显示单向链表中全部职工信息" << endl;
      cout << "\t 3 ---统计男女职工人数" << endl;
      cout << "\t 4 ---在职工尾部插入新结点" << endl;
      cout << "\t 5 ---删除指定编号的结点" << endl;
      cout << "\t 6 ---删除指定年龄的结点，并把被删除结点保存在另一链表中" << endl;
      cout << "\t 0 ---退出" << endl ;
cout << "\t\t";
      cin >> choice ;
  switch ( choice )
   {
case 1 : head = create() ; goto L ;
     case 2 : show( head );  goto L ;
     case 3 : count( head ); goto L;
     case 4 : head = insert(); goto L;
     case 5 : cout << "\t输入需删除结点编号:";
              cin >> bh;
             head = del( bh ); goto L;
        case 6 : head = delcreate(); goto L;
        case 0 : cout << " \t退出程序的运行！\n" << endl ; break ;
     default : cout << "\t输入错误，请重新输入！\n" << endl ; goto L;  
}
}