Question

C语言链表输出文件出现乱码

#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>
#define Null 0
#define LEN sizeof(struct student)
typedef struct student

{ long number;

char name[25];

char sex;

float score;

struct student *next;
}STU;
int n;
struct student *creat(void)
{
STU *head;
STU *p1,*p2;
p1=p2=(struct student*)malloc(LEN);
scanf("%ld",&p1->number);
scanf("%s",p1->name);getchar();
scanf("%c%f",&p1->sex,&p1->score);
n=0;
while(p1->number!=0)
{
n=n+1;
if(n==1) head=p1;
else p2->next=p1;
p2=p1;
p1=(struct student *)malloc(LEN);
scanf("%ld",&p1->number);
scanf("%s",p1->name);getchar();
scanf("%c%f",&p1->sex,&p1->score);

}
p2->next=Null;
return head;
}
void gather(struct student *head)
{
STU *p;
int Fnum=0,Wnum=0;
int s1,s2,t,temp;
p=head;
while(p!=Null)
{
if(p->sex=='F') Fnum++;
else Wnum++;
p=p->next;
};
s1=Fnum;
s2=Wnum;
if(s1<s2)
{
temp=s1;
s1=s2;
s2=temp;
}
while(s2!=0)
{
t=s1%s2;
s1=s2;
s2=t;
}
s1=Fnum/s1;
s2=Wnum/s1;
printf("男女生比例为:%d:%d",s1,s2);
}
void find(struct student *head,long number)
{
STU *p;
p=head;
while(p->number!=number&&p->next!=Null)
p=p->next;
if(p->number==number)
{
printf("查找的学生信息如下：");
printf("学号:%ld\n姓名:%s\n性别:%c\n单科成绩:%f\n",p->number,p->name,p->sex,p->score);
}
else printf("无此学生信息.");
}
void print(struct student *head)
{
STU *p;
p=head;
do
{
printf("学号:%ld 姓名:%s 性别:%c 单科成绩:%f\n",p->number,p->name,p->sex,p->score);
p=p->next;
}while(p!=NULL);
}
struct student *del(struct student *head,long number)
{
STU *p1,*p2;
p1=head;
while(number!=p1->number&&p1->next!=NULL)
{p2=p1;p1=p1->next;}
if(number==p1->number)
{
if(head=p1) head=p1->next;
else p2->next=p1->next;
}
else printf("无此学生学号，删除不成功.\n");
n=n-1;
return head;
}

void main()
{
STU *head,*p;
FILE *fp;
long number;
printf("请输入学生信息(当输入0时结束输入):\n");
head=creat();
print(head);
gather(head);
printf("请输入需要查找的学生姓名:");
scanf("%ld",&number);
find(head,number);
printf("各学生信息如下:\n");
print(head);
printf("\n");
printf("请输入你想删除的学生学号(输入0则停止输入):\n");
scanf("%ld",&number);
while(number!=0)
{
head=del(head,number);
print(head);
printf("请输入你想删除的学生学号(输入0则停止输入):\n");
scanf("%ld",&number);
}
p=head;
if((fp=fopen("d","w"))==Null)
{
printf("can't open this file!");
exit(0);
}
do
{
if(fwrite(p,LEN,1,fp)!=1)
printf("error!");
p=p->next;
}while(p!=Null);
fclose(fp);

}
前面程序正常在输出文件时有乱码出现。

Answer 1

#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>
#define Null 0
#define LEN sizeof(struct student)
typedef struct student

{ long number;

char name[25];

char sex;

float score;

struct student *next;
}STU;
int n;
struct student *creat(void)
{
STU *head;
STU *p1,*p2;
p1=p2=(struct student*)malloc(LEN);
p1->next=NULL;
scanf("%ld",&p1->number);
if(p1->number==0) return head;
head=p1;
scanf("%s",p1->name);getchar();
scanf("%c%f",&p1->sex,&p1->score);
while(p1->number!=0)
{
p1=(struct student *)malloc(LEN);
p1->next=Null;
scanf("%ld",&p1->number);
if(p1->number==0) return head;
scanf("%s",p1->name);getchar();
scanf("%c%f",&p1->sex,&p1->score);

p2->next=p1;
p2=p1;

}

return head;
}
void gather(struct student *head)
{
STU *p;
int Fnum=0,Wnum=0;
int s1,s2,t,temp;
p=head;
while(p!=Null)
{
if(p->sex=='F') Fnum++;
else Wnum++;
p=p->next;
};
s1=Fnum;
s2=Wnum;
if(s1<s2)
{
temp=s1;
s1=s2;
s2=temp;
}
printf("%d %d",s1,s2);

while(s2!=0)
{printf("iddd");
t=s1%s2;
s1=s2;
s2=t;
}
if(s2>0)
{
s1=Fnum/s1;
s2=Wnum/s1;
}
printf("男女生比例为:%d:%d",s1,s2);
}
void find(struct student *head,long number)
{
STU *p;
p=head;
while(p->number!=number&&p->next!=Null)
p=p->next;
if(p->number==number)
{
printf("查找的学生信息如下：");
printf("学号:%ld\n姓名:%s\n性别:%c\n单科成绩:%f\n",p->number,p->name,p->sex,p->score);
}
else printf("无此学生信息.");
}
void print(struct student *head)
{
STU *p;
p=head;
while(p!=NULL)
{
printf("学号:%ld 姓名:%s 性别:%c 单科成绩:%f\n",p->number,p->name,p->sex,p->score);
p=p->next;
}
}
struct student *del(struct student *head,long number)
{
STU *p1,*p2;
if(head==NULL)
{
printf("无学生信息\n");
return NULL;
}
p1=head;

while(number!=p1->number&&p1->next!=NULL)
{p2=p1;p1=p1->next;}
if(number==p1->number)
{
if(head==p1) head=p1->next;
else p2->next=p1->next;
}
else printf("无此学生学号，删除不成功.\n");
n=n-1;
return head;
}

void main()
{
STU *head,*p;
FILE *fp;
long number;
printf("请输入学生信息(当输入0时结束输入):\n");
head=creat();
print(head);
gather(head);
printf("请输入需要查找的学生学号:");
scanf("%ld",&number);
find(head,number);
printf("各学生信息如下:\n");
print(head);
printf("\n");
printf("请输入你想删除的学生学号(输入0则停止输入):\n");
scanf("%ld",&number);
while(number!=0)
{
head=del(head,number);
print(head);
printf("请输入你想删除的学生学号(输入0则停止输入):\n");
scanf("%ld",&number);
}

if(head!=NULL)
{ p=head;
if((fp=fopen("d","w"))==Null)
{
printf("can't open this file!");
exit(0);
}
do
{
if((fprintf(fp," %ld %s %c %f",p->number,p->name,p->sex,p->score))<=0)
printf("error!");
p=p->next;
}while(p!=Null);
fclose(fp);
}
}