新建 文本文档.txt

该程序是学生管理系统的源码

#include <stdio.h>
#include <string.h>
#include <malloc.h>
#define NULL 0
#define LEN sizeof(struct student)
struct date {int month;int day;int year;};
struct student
{
int num;
char name[20];
int tel;
struct date birthday;
int dor;
char addr[30];
int math;
int Eng;
int phy;
struct student *next;
};
int n;

struct student *creat(void)
{
struct student *head;
struct student *p1,*p2;
n=0;
p1=p2=(struct student*)malloc (LEN);
  printf("num:");  scanf("%d",&p1->num);
  printf("name:"); scanf("%s",p1->name);
  printf("tel:");  scanf("%d",&p1->tel);
  printf("year:");  scanf("%d",&p1->birthday.year);
  printf("month:"); scanf("%d",&p1->birthday.month);
  printf("day:");  scanf("%d",&p1->birthday.day);
  printf("dor:");  scanf("%d",&p1->dor);
  printf("addr:"); scanf("%s",p1->addr);
  printf("math:"); scanf("%d",&p1->math);
  printf("Eng:");  scanf("%d",&p1->Eng);
  printf("phy:");  scanf("%d",&p1->phy);
 head=NULL;
 while(p1->num!=0)
 {
 n=n+1;
 if(n==1) head=p1;
 else p2->next=p1;
 p2=p1;
 p1=(struct student*)malloc(LEN);
  printf("num:");  scanf("%d",&p1->num);
  printf("name:"); scanf("%s",p1->name);
  printf("tel:");  scanf("%d",&p1->tel);
  printf("year:");  scanf("%d",&p1->birthday.year);
  printf("month:"); scanf("%d",&p1->birthday.month);
  printf("day:");  scanf("%d",&p1->birthday.day);
  printf("dor:");  scanf("%d",&p1->dor);
  printf("addr:"); scanf("%s",p1->addr);
  printf("math:"); scanf("%d",&p1->math);
  printf("Eng:");  scanf("%d",&p1->Eng);
  printf("phy:");  scanf("%d",&p1->phy);
 }
 p2->next=NULL;
 return(head);
}

void print(struct student *head)
{
struct student *p1;
printf("\n now,these %d students' information are:\n",n);
p1=head;
if(head!=NULL)
 do
  {printf("num:%d ",p1->num);
   printf("name:%s ",p1->name);
   printf("tel:%d ",p1->tel);
   printf("year:%d",p1->birthday.year);
   printf("month:%d",p1->birthday.month);
   printf("day:%d",p1->birthday.day);
   printf("dor:%d ",p1->dor);
   printf("addr:%s ",p1->addr);
   printf("math:%d ",p1->math);
   printf("Eng:%d ",p1->Eng);
   printf("phy:%d\n",p1->phy);
   p1=p1->next;
  }while(p1!=NULL);
}

struct student *del(struct student *head,int num)
{
 struct student *p1,*p2;
 if(head==NULL)
   {printf("\nlise null!\n");return(NULL);}
   p1=head;
   while(num!=p1->num&&p1->next!=NULL)
      {p2=p1;p1=p1->next;}
    if(num==p1->num)
       {if(p1==head)head=p1->next;
       else p2->next=p1->next;
       printf("delete:%d\n",num);
       n=n-1;
    }
    else printf("%d not been found!\n",num);
  return(head);
}

struct student *insert(struct student *head,struct student *stud)
{
struct student *p0,*p1,*p2;
p1=head;p0=stud;
 if(head==NULL)
  {head=p0;p0->next=NULL;}
 else
  {while((p0->num>p1->num)&&(p1->next!=NULL))
	{p2=p1;p1=p1->next;}
	if(p0->num<=p1->num)
	 {if(head==p1)head=p0;
	 else p2->next=p0;p0->next=p1;}
	else
	 {p1->next=p0;p0->next=NULL;}
  }
  n=n+1;
  return(head);
}

struct student * search(struct student *head,int num)
{struct student *p1,*p2;
 if(head==NULL)printf("\nlist null!\n");
 p1=head;
 while(num!=p1->num&&p1->next!=NULL){p2=p1;p1=p1->next;}
 if(num==p1->num)
 {if(p1==head)p1->next=NULL;
  else {head=p2->next;p1->next=NULL;}}
 else printf("%ld student is not exsit!\n",num);
 return(head);
}

struct student * edit(struct student *head,struct student *stud)
{struct student *p0,*p1,*p2;
 p1=head;p0=stud;
 if(head==NULL)printf("\nlist null!\n");
 else
 { while(p0->num!=p1->num&&p1->next!=NULL)
  {p2=p1;p1=p1->next;}
  if(p0->num==p1->num)
   {if(head==p1){head=p0;p0->next=p1->next;}
    else {p2->next=p0;p0->next=p1->next;} }
  else printf("This student is not exsit!\n");
  return(head);}
}
void main()
{
 struct student *head,p1,*stu;int sel,del_num,num;
 while(1)
 {printf("===================main menu=================\n");
  printf("===     1.creat a new linked lise.        ===\n");
  printf("===     2.these students' infornation are:===\n");
  printf("===     3.insert a new student.           ===\n");
  printf("===     4.deldte a student.               ===\n");
  printf("===     5.search a student's infornation  ===\n");
  printf("===     6.edit a student.                 ===\n");   
  printf("===     0.exit.                           ===\n");
  printf("=============================================\n");
  printf("please input a number(0~4)?");
  scanf("%d",&sel);
  if(sel==0)break;
  switch(sel)
  {case 1:
    printf("input records:\n");
    head=creat();
    break;
   case 2:
    printf("these students' infornation are:\n");
    print(head);
    break;
   case 3:
   printf("please input the iserted record:\n");
   printf("num:");  scanf("%d",&p1.num);
   printf("name:"); scanf("%s",p1.name);
   printf("tel:");  scanf("%d",&p1.tel);
   printf("year:");  scanf("%d",&p1.birthday.year);
   printf("month:"); scanf("%d",&p1.birthday.month);
   printf("day:");  scanf("%d",&p1.birthday.day);
   printf("dor:");  scanf("%d",&p1.dor);
   printf("addr:"); scanf("%s",p1.addr);
   printf("math:"); scanf("%d",&p1.math);
   printf("Eng:");  scanf("%d",&p1.Eng);
   printf("phy:");  scanf("%d",&p1.phy);
    head=insert(head,&p1);
    print(head);
    break;
   case 4:
    printf("\ninput the deleted number:");
    scanf("%d",&del_num);
    head=del(head,del_num);
    print(head);
    break;
   case 5:
    printf("\ninput the search number:");
    scanf("%d",&num);
    head=search(head,num);
    printf("This student's record:\n");
    print(head);
    break;
   case 6:
    printf("\ninput the edited record:\n");
    stu=(struct student *)malloc(LEN);
    printf("num:");  scanf("%d",&p1.num);
    printf("name:"); scanf("%s",p1.name);
    printf("tel:");  scanf("%d",&p1.tel);
    printf("year:");  scanf("%d",&p1.birthday.year);
    printf("month:"); scanf("%d",&p1.birthday.month);
    printf("day:");  scanf("%d",&p1.birthday.day);
    printf("dor:");  scanf("%d",&p1.dor);
    printf("addr:"); scanf("%s",p1.addr);
    printf("math:"); scanf("%d",&p1.math);
    printf("Eng:");  scanf("%d",&p1.Eng);
    printf("phy:");  scanf("%d",&p1.phy);
    head=edit(head,stu);
    print(head);break;
   default:
    printf("Your selecation is wrong.\n");
   }
   printf("\n press any key,continue...\n");
   getch();
  }
}