求大神：帮我看看哪里出错了。提示：.exe 文件已停止工作（出现一个问题）
#include<stdio.h>#include<stdlib.h>
#include<string.h>
struct student
{
int num;
char name[20];
int sex;
int bir;
char college[50];
char degree[20];
struct student *next;
};
#define LEN sizeof(struct student)
struct student *creat()//创建链表
{
struct student *head=NULL;
return head;
}
struct student *insert(struct student *head)//插入结点
{
struct student *p0,*p1,*p2;
p0=(struct student *)malloc(LEN);
p0->next=NULL;
printf("编号：");
scanf("%d",&p0->num);
printf("姓名：");
scanf("%s",p0->name);
printf("性别（男：1,女：2）：");
scanf("%d",&p0->sex);
printf("出生日期：");
scanf("%d",&p0->bir);
printf("学院：");
scanf("%s",p0->college);
printf("学位（学士、硕士、博士in English）：");
scanf("%s",p0->degree);
getchar();
if(head==NULL)head=p0;
else
{
p1=head;
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;
}
return (head);
}
struct student *del(struct student *head,int n)//删除
{
struct student *p1,*p2=NULL;
p1=head;
while((n!=p1->num)&&(p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(n==p1->num)
{
if(p1==head)head=p1->next;
else p2->next=p1->next;
free(p1);
printf("已成功删除！\n");
}
else printf("不存在该学生！\n");
return (head);
}
struct student *amend(struct student *head)//修改
{
struct student *p1,*p2=NULL;
int num;
p1=head;
printf("请输入要修改信息的学生编号：");
scanf("%d",&num);
while((num!=p1->num)&&(p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(num==p1->num)
{
printf("请输入学生信息：\n");
printf("编号：");
scanf("%d",&p1->num);
}
else printf("不存在该学生！\n");
return (head);
}
struct student *search(struct student *head)//查找
{
struct student *p;
p=head;
int i,j,k;
char ch[20];
printf("请输入查询方式：(1.编号/2.姓名/3.学院\n");
scanf("%d",&i);
switch(i)
{
case 1:printf("请输入学生编号：");scanf("%d",&j);
for(k=0;;k++)
{
if(p->num==j)
{
printf("%s",p->name);
break;
}
if(p->next==NULL)break;
p=p->next;
}break;
case 2:printf("请输入学生的姓名：");getchar();gets(ch);
for(k=0;;k++)
{
if(strcmp(p->name,ch)==0)
{
printf("%s",p->name);
break;
}
if(p->next==NULL)break;
p=p->next;
}break;
case 3:printf("请输入学院名称：\n");getchar();gets(ch);
for(k=0;;k++)
{
if(strcmp(p->college,ch)==0)
printf("%s",p->name);
if(p->next==NULL)break;
p=p->next;
}break;
default:printf("输入有误!\n");
}
return head;
}
void fun6(struct student *head)//统计
{
struct student *p;
int A=0,B=0,C=0,n=0,i;
float m;
p=head;
for(i=1;;i++)
{
if(p->bir>=1990)n++;
if(p->next==NULL)break;
p=p->next;
}
printf("1990年以后出生的学生人数为%d\n",n);
m=(float)n/i;//90后比例
printf("90后学生所占比例为：%.2f\n",m);
p=head;
for(i=1;;i++)
{
if(strcmp(p->degree,"boshi")==0)A++;
if(strcmp(p->degree,"shuoshi")==0)B++;
if(strcmp(p->degree,"xueshi")==0)C++;
if(p->next==NULL)break;
p=p->next;
}
printf("博士人数为：%d\n硕士人数为：%d\n学士人数为：%d\n",A,B,C);
m=(float)A/i;
printf("博士学位的学生所占比例为：%.2f\n",m);
//学位比例
}
void files(struct student *head)//文件
{
struct student *p;
int i=0;
p=head;
FILE *fp;
if((fp=fopen("data.txt","w+"))==NULL)
{
printf("can't open file!\n");
exit(0);
}
while(p!=NULL)
{
i++;
p=p->next;
}
while(head!=NULL)
{
fwrite(p,LEN,i,fp);
head=head->next;
}
printf("已保存至文件！\n");
fclose(fp);
}
void list(struct student *head)//输出
{
struct student *p;
p=head;
while(p!=NULL)
{
printf("%d",p->num);
p=p->next;
}
}
struct student *fun1(void)//fun1
{
struct student *head;
int n=3;
char ch='y';
head=creat();
while(ch=='Y'||ch=='y')
{
head=insert(head);
printf("继续输入？(y/n):");
ch=getchar();
getchar();
}
return head;
}
struct student *fun3(struct student *head)//fun3
{
int n;
char ch='y';
while(ch=='Y'||ch=='y')
{
printf("请输入要删除信息的学生编号：");
scanf("%d",&n);
getchar();
head=del(head,n);
printf("继续删除？(y/n):");
ch=getchar();
getchar();
}
return head;
}
void main()
{
struct student *head;
int select;
while(1)
{
printf("\n");
printf("\t---------------------------------------------------------------\n");
printf("\t* *\n");
printf("\t* ********************** 高校学生管理系统 *****************\n");
printf("\t* 学生学号： *\n");
printf("\t* 学生班级： *\n");
printf("\t* 学生姓名： *\n");
printf("\t* 感谢使用 *\n");
printf("\t--------------------------------------------------------------\n\n");
printf("\t 1.创建学生信息\n");
printf("\t 2.增加学生信息\n");
printf("\t 3.删除学生信息\n");
printf("\t 4.修改学生信息\n");
printf("\t 5.查询学生信息\n");
printf("\t 6.统计学生信息\n");
printf("\t\n");
printf("\t 请选择功能按键0-6\n");
scanf("%d",&select);
getchar();
switch(select)
{
case 1:head=fun1();
files(head);break;
case 2:head=insert(head);
files(head);break;
case 3:head=fun3(head);
files(head);break;
case 4:head=amend(head);
files(head);break;
case 5:search(head);break;
case 6:fun6(head);break;
default:printf("按键错误，请重新选择！\n");
}
list(head);
}
}
[ 本帖最后由 幸运的杨震 于 2014-7-11 06:22 编辑 ]
