#include<stdio.h>
#include<malloc.h>
#define LENGTH sizeof(struct student)
#include <stdlib.h>
#include <string.h>
struct student
{
long num;
int clas; //用四位数表示clas，例如0801
char name[20];
char sex[6]; //用male与female表示
float score;
struct student *next;
};
int n;struct student *head,*stud;long del_num=0;char xname[20];int xnum=0;int flag=1;
struct student *creat(void) //创建动态链表
{
struct student *p1,*p2;
n=0;
p1=p2=(struct student *)malloc(LENGTH);
printf("请输入学号,如05:");
scanf("%ld",&p1->num);
printf("请输入班级，如01:");
scanf("%d",&p1->clas);
printf("请输入姓名:");
scanf("%s",p1->name);
printf("请选择性别（female,male）:");
scanf("%s",p1->sex);
printf("请输入分数:");
scanf("%f",&p1->score);
head=NULL;
while(flag!=0)
{
n=n+1;
if(n==1)
head=p1;
else
{
p2->next=p1;
p2=p1;
}
p1=(struct student *)malloc(LENGTH);
printf("请输入学号，如05:");
scanf("%ld",&p1->num);
printf("请输入班级，如01:");
scanf("%d",&p1->clas);
printf("请输入姓名:");
scanf("%s",p1->name);
printf("请选择性别（female,male）:");
scanf("%s",p1->sex);
printf("请输入分数:");
scanf("%f",&p1->score);
printf("结束学生信息输入请输入0,否则输入1:");
scanf("%d",&flag);
}
p2->next=NULL;
return(head);
}
void findname(struct student *head,char xname[20]) //按姓名查找
{
int mark=0;
while(head!=NULL)
{
if(head->name==xname)
{
printf("\n%ld,%d,%s,%s,%f",head->num,head->clas,head->name,head->sex,head->score);
mark=1;
break;
}
else head=head->next;
}
if(mark==0)
printf("未发现！");
}
void findID(struct student *head,int xnum) //按学号查找
{
int mark=0;
while(head!=NULL)
{
if(head->num==xnum)
{
printf("\n%ld,%d,%s,%s,%f",head->num,head->clas,head->name,head->sex,head->score);
mark=1;
break;
}
else head=head->next;
}
if(mark==0)
printf("未发现！");
}
struct student *del(struct student *head,long del_num) //记录的删除
{
struct student *p1,*p2;
if(head==NULL)
{
printf("\nlist null!\n");
goto end;
}
else
{
p1=head;
while(del_num!=p1->num&&p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(del_num==p1->num)
{
if(p1==head)
head=p1->next;
else
p2->next=p1->next;
printf("delete:%d\n",del_num);
n=n-1;
}
else printf("%d not been found!\n",del_num);
}
end:return(head);
}
struct student *insert(struct student *head,struct student *stud) //stud为待插入节点,按学号大小排序插入的记录
{
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;
p0->next=p1;
}
}
else
{
p1->next=p0;
p0->next=NULL;
}
}
n=n+1;
return(head);
}
void print(struct student *head) //记录的输出读取
{
struct student *p;
p=head;
printf("\nNow,these records are:\n");
if(head!=NULL)
do
{
printf("学号:%ld\n",p->num);
printf("班级:%d\n",p->clas);
printf("姓名:%s\n",p->name);
printf("性别:%s\n",p->sex);
printf("分数:%f\n",p->score);
p=p->next;
}
while(p!=NULL);
}
void main()
{
int choice=0;
printf("输入学生信息:\n");
head=creat( );
print(head);
printf("\n1:分班显示记录\n");
printf("2:按姓名查找记录\n");
printf("3:按学号查找记录\n");
printf("4:删除记录\n");
printf("5:记录排序\n");
printf("6:退出\n");
do
{
printf("\n请输入功能选择:");
scanf("%d",&choice);
if(choice==1)
{
}
else if(choice==2)
{
printf("请输入要查找的学生姓名:");
scanf("%s",xname);
findname(head,xname);
}
else if(choice==3)
{
printf("请输入要查找的学生学号:");
scanf("%d",&xnum);
findID(head,xnum);
}
else if(choice==4)
{
printf("请输入要删除的学生学号:");
scanf("%d",&del_num);
struct student *del(struct student *head,long del_num);
print(head);
}
else if(choice==5)
{
printf("请输入要插入的节点:num、clas、name、sex、score\n");
scanf("%ld,%d,%s,%s,%f",&stud->num,&stud->clas,stud->name,stud->sex,&stud->score);
struct student *insert(struct student *head,struct student *stud);
}
else if(choice==6)
{
printf("谢谢使用！\n");
}
else
printf("非法输入，请输入1~6之间的数！\n");
}
while(choice!=6);
}
这个程序可以运行，但运行时只能输出第一个结点，并且功能2，4，5都不能实现，功能一还没编，暂且不用管。功能2与3属同性质问题，3可以实现，不知道2为什么不可以。麻烦看一看，THANKYOU!