课程设计之学生信息管理

#include<stdio.h>
#include<malloc.h>
#include <string.h>
#define NULL 0
struct Student
{
long num;
char name[20];
char sex[4];
int year;
int month;
int day;
char email[20];
long PHONE;
char address[30];
struct Student *next;
};
int n;
struct Student * creat(void)
{
struct Student *head;
struct Student *p1,*p2;
p1=p2=(struct Student * )malloc(sizeof(struct Student));
printf("输入学号：");
scanf("%ld", &p1->num);
printf("输入姓名：");
scanf("%s", p1->name);
printf("输入性别：");
scanf("%s", p1->sex);
printf("输入出生年月日：");
scanf("%d%d%d", &p1->year,&p1->month,&p1->day);
printf("输入email: ");
scanf("%s",p1->email);
printf("输入电话:");
scanf("%ld",&p1->PHONE);
printf("输入家庭住址：");
scanf("%s",p1->address);
head=NULL;
while(p1->num!=0)
{
n=n+1;
if(n==1) head=p1;
else p2->next=p1;
p2=p1;
p1=(struct Student*)malloc(sizeof(struct Student));
printf("输入学号：");
scanf("%ld", &p1->num);
printf("输入姓名：");
scanf("%s", p1->name);
printf("输入性别：");
scanf("%s", p1->sex);
printf("输入出生年月日：");
scanf("%d %d %d", &p1->year,&p1->month,&p1->day);
printf("输入email: ");
scanf("%s",p1->email);
printf("输入电话:");
scanf("%ld",&p1->PHONE);
printf("输入家庭住址:");
scanf("%s",p1->address);
}
p2->next=NULL;
return(head);
}
void print(struct Student *head)
{
struct Student *p;
printf("\n%d个学生的信息为:",n);
p=head;
if(head!=NULL)
do
{
printf("学号：%d ",p->num);
printf("姓名：%s ",p->name);
printf("性别：%s ",p->sex);
printf("%d 年%d 月%d 日出生",p->year,p->month,p->day);
printf("email:%s",p->email);
printf("电话:%ld\n",p->PHONE);
printf("家庭住址:%s",p->address);
p=p->next;
}
while(p!=NULL);
}
struct Student * del(struct Student *head,long num)
{
struct Student *p1,*p2;
if(head==NULL) { printf("\n 列表为空! \n");
return head;
}
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("已删除学号：%ld\n",num);
n=n-1;
}
else printf("%ld未找到\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;
}
void search(struct
Student *head,long num)
{
struct Student * p = head;
while(p!=NULL)
{
if(p->num==num)
{
printf("学号：%d ",p->num);
printf

("姓名：%s ",p->name);
printf("性别：%s ",p->sex);
printf("%d 年%d 月%d 日出生",p->year,p->month,p->day);
printf("email:%s",p->email);
printf("电话:%ld\n",p->PHONE);
printf("家庭住址:%s",p->address);
break;
}
else
{
p = p->next;
}
}
}
void change (struct Student *head,long num)
{
int ch1;
printf("1修改学生姓名 2修改学生性别 3修改学生email 4修改学生电话 5 修改学生家庭住址6 修改出生日期的年 7修改出生日期的月 8修改出生日期的日 ");
scanf("%d", &ch1);
switch(ch1)
{
case 1:
{
char name[10];
printf("请输入改正后的学生的姓名：");
scanf("%s",name);
struct Student *p=head;
while(p!=NULL)
{
if(p->num==num)
{
strcpy(p->name,name);
print(head);
break;
}
else
p=p->next;
}
break ;
}
case 2:{
char sex1[4];
printf("请输入改正后的学生的性别：");

scanf("%s",sex1);
struct Student *p=head;
while(p!=NULL)
{
if(p->num==num)
{
strcpy(p->sex,sex1);
print(head);
break;
}
else
p=p->next;
}
break ;
}
case 3:{
char email1[10];
printf("请输入改正后的学生的email：");
scanf("%s",email1);
struct Student *p=head;
while(p!=NULL)
{
if(p->num==num)
{
strcpy(p->email,email1);
print(head);
break;
}
else
p=p->next;
}
break ;
}
case 4:{
long phone;
printf("请输入改正后的学生PHONE：");
scanf("%d",&phone);
struct Student *p=head;
while(p!=NULL)
{
if(p->num==num)
{
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