C++实现简单的学生管理系统

C++实现简单的学生管理系统

//Student.cpp

#include
 
using namespace std;
 
struct Stu
{
  char no[10];
  char name[16];
  int math;
  int chi;
  double ave;
};
 
class Student
{
public:
  Stu st;
  Student * next;
public:
  Student(){}
  Student(Stu s)
  {
    st=s;
    next=NULL;
    st.ave=(st.math+st.chi)/2.0;
  }
  void setst(Stu s)
  {
    st=s;
    st.ave=(st.math+st.chi)/2.0;
  }
  Stu getst()
  {
    return st;
  }
  void show()
  {
    cout<<"----------------------------"<

//main.cpp



#include
#include"Student.cpp"
 
using namespace std;
 
Student * create_List();
void traverse_List(Student * pHead);
bool is_empty(Student * pHead);
int length_List(Student * pHead);
bool insert_List(Student * pHead,int position,Stu st);
bool delete_List(Student * pHead,int position,Stu * st);
void sort_List(Student * pHead); 
void menu_select();
void handle_menu(int s);
void outFile();
Student * inFile();
void delFile();
 
Student * pHead;
 
 
void main()
{
  menu_select();
}
 
void menu_select()
{
  int s;
  cout<<"请输入您要操作的选项:"<>s;
  handle_menu(s);
}
 
void handle_menu(int s)
{
  switch (s)
  {
  case 1:
    {
      system("cls");
      pHead=create_List();
      system("cls");
      menu_select();
      break;
    }
  case 2:
    {
      if(NULL==pHead)
      {
 cout<<"记录总条数为零"<>num;
      cout<<"编辑要插入的记录:"<>st.no;
      cout<<"姓名:";
      cin>>st.name;
      cout<<"数学成绩:";
      cin>>st.math;
      cout<<"语文成绩:";
      cin>>st.chi;
      if(insert_List(pHead,num-1,st))
      {
 cout<<"插入成功!"<>num;
      if(delete_List(pHead,num,st))
      {
 cout<no<name<next=NULL;
  ifstream in("c:\kcsj.txt");
  if (!in.is_open())
  {
    cout << "Error opening file"<(&st), sizeof(st));
    if (in.fail()) 
    {
      break;
    }
    Student * pNew=new Student();
    if(NULL==pNew)
    {
      printf("分配失败,程序终止n");
      exit(0);
    }
    pNew->setst(st);
    pTail->next=pNew;
    pNew->next=NULL;
    pTail=pNew;
  }
  in.close();
  return pHead;
}
 
 
void outFile()
{
  ofstream out;
  out.open("c:\kcsj.txt",ios_base::out|ios_base::app|ios::binary);
  if(!out)
  {
    cout<<"文件不存在，退出时别忘记保存文件!"<next;
  while(temp!=NULL)
  {
    Stu st=temp->getst();
    out.write(reinterpret_cast(&st), sizeof(st));
    temp=temp->next;
  }  
  out.close();
}
 
Student * create_List()
{
  int len;
  Student * pHead=(Student *)malloc(sizeof(Student));
  if(NULL==pHead)
  {
    cout<<"分配失败,程序终止!"<next=NULL;
  cout<<"请输入要存储的学生人数:";
  cin>>len;
  for(int i=0;i>st.no;
    cout<<"请输入第"<>st.name;
    cout<<"请输入第"<>st.math;
    cout<<"请输入第"<>st.chi;
    Student * pNew=new Student();
    if(NULL==pNew)
    {
      printf("分配失败,程序终止n");
      exit(0);
    }
    pNew->setst(st);
    pTail->next=pNew;
    pNew->next=NULL;
    pTail=pNew;
  }
  return pHead;
}
 
void traverse_List(Student * pHead)
{
  int i=1;
  Student * temp=pHead->next;
  while(temp!=NULL)
  {
    cout<show();
    temp=temp->next;
    i++;
  }
}  
 
bool is_empty(Student * pHead)
{
  if(NULL==pHead->next)
  {
    return true;
  }
  else
  {
    return false;
  }
}
 
int length_List(Student * pHead)
{
  int len=0;
  Student * temp=pHead->next;
  while(temp)
  {
    len++;
    temp=temp->next;
  }
  return len;
}
 
bool insert_List(Student * pHead,int position,Stu st)
{
  int i=0;
  Student * p=pHead;
 
  while(NULL!=p&&inext;
    i++;
  }
  if(i>position-i||NULL==p)
  {
    return false;
  }
  Student * pNew=(Student *)malloc(sizeof(Student));
  if(NULL==pNew)
  {
    cout<<"分配失败,程序终止"<setst(st);
  pNew->next=p->next;
  p->next=pNew;
  return true;
}
 
bool delete_List(Student * pHead,int position,Stu * st)
{
  int i=0;
  Student * p=pHead;
 
  while(NULL!=p->next&&inext;
    i++;
  }
  Student * q=p->next;
  *st=q->getst();
  p->next=p->next->next;
  free(q);
  q=NULL;
  return true;
}
 
void sort_List(Student * pHead)
{
  Student * p,* q;
  Stu temp;
  int i,j;
  int len=length_List(pHead);
  for(i=0,p=pHead->next;inext)
  {
    for(j=i+1,q=p->next;jnext)
    {
      if(q->st.ave>p->st.ave)
      {
 temp=q->st;
 q->st=p->st;
 p->st=temp;
      }
    }
  }  
}

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