pro_stu.cpp

学生旷课记录模拟

#include <iostream>
#include <string.h>
using namespace std;
typedef struct STNode{
 int data;
 char name[14];
 char num[10];
 char Class[15];
 char speciality[15];
 int Knum;
 struct STNode *next;
 
 }STNode,  *Lp;
 
STNode *InitINput(STNode *head, int i)
{cout<<"这是个空表，请输入:"<<endl;
int j=1;
STNode *head1,*p;

while(j<=i)
{p=(STNode *)malloc(sizeof(STNode));//(int *)malloc(sizeof(int));
 if(j==1)
 {   head->next=p;	 
     p->next=NULL;
	 head1=p;
  cout<<"请输入第1个学生相关信息："<<endl;
  cout<<endl<<"输入姓名："; 
  cin>>p->name;
  cout<<endl<<"输入学号：";
  cin>>p->num;
  cout<<endl<<"输入年级：";
  cin>>p->Class;
  cout<<endl<<"输入专业：";
  cin>>p->speciality;
  cout<<endl<<"输入旷课次数：";
  cin>>p->Knum;
  p->data=1;
  j++;
 }
 else 
 {
	 head1->next=p;
  p->next=NULL;
  head1=p;
  p->data=j;
  cout<<"请输入第"<<p->data<<"个学生相关信息："<<endl;
  cout<<endl<<"输入姓名："; 
  cin>>p->name;
  cout<<endl<<"输入学号：";
  cin>>p->num;
  cout<<endl<<"输入年级：";
  cin>>p->Class;
  cout<<endl<<"输入专业：";
  cin>>p->speciality;
  cout<<endl<<"输入旷课次数：";
  cin>>p->Knum;

  j++;
 }
}
return head;
}
STNode *Insert(STNode *head)
{STNode *head1,*p;
cout<<"添加学生信息:"<<endl;
	if(head->next==NULL)
	cout<<"这是一个空表"<<endl;
	else
	 {
	  head1=head->next;
	  if(head1->next!=NULL)
        head1=head1->next;
      else
	    {p=(STNode *)malloc(sizeof(STNode));
	     head1->next=p;
         p->next=NULL;
         cout<<"请输入新插入学生相关信息："<<endl;
         cout<<endl<<"输入姓名："; 
         cin>>p->name;
         cout<<endl<<"输入学号：";
         cin>>p->num;
         cout<<endl<<"输入年级：";
         cin>>p->Class;
         cout<<endl<<"输入专业：";
         cin>>p->speciality;
         cout<<endl<<"输入旷课次数：";
         cin>>p->Knum;
	     p->data=head1->data+1;
	    }
	 }

return head;
}

STNode *GetElem(STNode *head)
{char *num1 =new char[10];  //int *p=new int;
 char *num2 =new char[10];  //int *p[10]=new int [10]; 
 cout<<"查询某个同学的情况："<<endl;
 cout<<"请输入学号："<<endl;
 cin>>*num1 ;
 STNode *p1;

if(head==NULL)//若调用次函数以前的头指针head为空 
{ 
cout<<" 这是一个空表,请先输入考生成绩.\n"; 
return(head); 
} 
else 
{ 
p1=head;//否则将头指针赋给p1 
num2 =p1->num;
while((strcmp(num1 ,num2 )!=0)&&p1->next!=NULL) 
//寻找结点当p1所指的学生证号不是输入的学生证号并且p1所指的next指针不为空 
{ 
p1=p1->next; 
}//p2指向原p1指向的结点p1后移一个结点 
if((strcmp(num1 ,num2 )==0))
{cout<<"姓    名："<<p1->name;  
 cout<<"学    号："<<p1->num;
 cout<<"年    级："<<p1->Class;
 cout<<"专    业："<<p1->speciality;
 cout<<"旷课次数："<<p1->Knum;

 }
}

return(head); 
}

 
 void main()
 {
	 int i=2;
	 STNode *head;
 head=(STNode *)malloc(sizeof(STNode)); 
 head->next=NULL;
 head=InitINput(head, i);
 Insert( head);
 GetElem(head);

system ("pause");
 }