学生信息管理系统1.0

#include<stdio.h>
#include<stdlib.h>
#define MAX 20
typedef struct Node{
  int id;
  char name[MAX];
  char xy[MAX];
  int year;
  int month;
  int day;
  struct Node *next;
}node;
void cd_main()//菜单页面
{
  printf("\n\n");
  printf("\t--------------------------------\n");
  printf("\t       欢迎使用学生信息管理系统    \n");
  printf("\t--------------------------------\n");
  printf("\t          1.录入学生信息          \n");
  printf("\t          2.查询学生信息          \n");
  printf("\t          3.修改学生信息          \n");
  printf("\t          4.删除学生信息          \n");
  printf("\t          5.显示所有学生信息       \n");
  printf("\t          6.退出                 \n");
  printf("\t--------------------------------\n");
  printf("\t请选择功能1-6:");
  printf("\n\n");
}
void cd_creat(node *d)//学生信息录入函数
{
  printf("\t--------------------------------\n");
  printf("请输入\n");
  printf("%s","学生学号(id):" );
  scanf("%d",&d->id);
  getchar();
  printf("%s","学生姓名:");
  fgets(d->name,MAX,stdin);
  printf("%s","学生性别:");
  fgets(d->xy,MAX,stdin);
  printf("%s","出生日期(年):");
  scanf("%d",&d->year);
  printf("%s","出生日期(月):");
  scanf("%d",&d->month);
  printf("%s","出生日期(日):");
  scanf("%d",&d->day);
  printf("\t--------------------------------\n");
  printf("\n\n");
}

void node_creat(node *Head)//在创建时通过id直接对链表排序
{
  node *p,*pTemp,*pre;
  int t=1;
  pTemp=(node *)malloc(sizeof(node));
  cd_creat(pTemp);
  pre=Head;
  p=Head->next;
  while(p!=NULL){
    if(pTemp->id<p->id){
      pre->next=pTemp;
      pTemp->next=p;
      t=0;
    }
    pre=p;
    p=p->next;
  }
  if(t){
    pre->next=pTemp;
    pTemp->next=p;
  }
}
void node_printf_one(node *p)//打印单个学生信息
{
  printf("\t--------------------------------\n");
  printf("%s%08d\n","学生学号(id):",p->id );
  printf("%s%s","学生姓名:",p->name);
  printf("%s%s","学生性别:",p->xy);
  printf("%s%8d年\n","出生日期(年):",p->year);
  printf("%s%8d月\n","出生日期(月):",p->month);
  printf("%s%8d日\n","出生日期(日):",p->day);
  printf("\t--------------------------------\n");
  printf("\n\n");
}
void node_printf_all(node *head)//打印所有学生信息
{
  node *p=head;
  while(p!=NULL){
    node_printf_one(p);
    printf("\t--------------------------------\n");
    printf("\n\n");
    p=p->next;
  }
}
node *node_find(node *head,int id)//查找学生id节点指针函数
{
  node *p=head;
  while(p->id!=id){
    p=p->next;
  }
  return p;
}
void node_correct(node *head)//修改函数
{
  node *p;
  int t;
  printf("请输入学生id:");
  scanf("%d",&t);
  printf("\n\n");
  p=node_find(head,t);
  cd_creat(p);
}
node *node_delect(node *Head,int id)删除函数
{
  node *p=Head->next,*pre=Head;
  while(p&&p->id!=id){
    pre=p;
    p=p->next;
  }
  if(p!=NULL)
    pre->next=p->next;
  return p;
}
int main()
{
  node *head,*Head;//Head指空头节点
  Head=(node *)malloc(sizeof(node));
  head=(node *)malloc(sizeof(node));
  Head->next=head;
  head->next=NULL;
  int n,n_id,t=1;
  while(1){
    cd_main();
    scanf("%d",&n);
    switch (n) {
      case 1:
        if(t){
          cd_creat(head);
          //node_printf_one(head);
          t=0;
        }
        else{
          node_creat(Head);
          //node_printf_one(head);
        }
        break;
      case 2:
        printf("请输入学生id:");
        scanf("%d",&n_id);
        printf("\n\n");
        node_printf_one(node_find(head,n_id));
        break;
      case 3:
        node_correct(head);
        break;
      case 4:
        printf("请输入学生id:");
        scanf("%d",&n_id);
        if(node_delect(Head,n_id)!=NULL)
          printf("删除成功\n");
        else
          printf("无此id\n");
        break;
      case 5:
        node_printf_all(head);
        break;
      case 6:
        exit(0);
        break;
    }
    printf("请输入任意键继续\n");
    getchar();
    getchar();
  }
  return 0;
}