求高手指导文件读取问题
程序代码：
#include<stdio.h>
#include<stdlib.h>
#include<malloc.h>
#define TYPE struct Chose
#define endinput printf("输入0，0结束")
TYPE
{
int num;
float price;
TYPE * next;
};
int n;
void menu()
{
printf("提示：\n");
printf("1.首次输入：\n");
printf("2.补充输入：\n");
printf("3.存盘：\n");
printf("4.读取：\n");
printf("5.删除：\n");
printf("6.修改：\n");
printf("7.退出：\n");
}
void save(TYPE * head)
{
FILE * fp;
TYPE * p;
if((fp=fopen("mk.txt","w"))==NULL)
{
printf("cannot open infile\n");
exit(0);
}
for(p=head;p!=NULL;p=p->next)
{
if((fprintf(fp,"%d,%f",p->num,p->price)!=1))
printf("file write error\n");
}
fclose(fp);
}
void load(TYPE * head)
{
FILE * fp;
TYPE u[20];
TYPE * p;
int i;
if((fp=fopen("mk.txt","r"))==NULL)
{
printf("cannot open infile\n");
exit(0);
}
p=head;
for(i=0;i<100;i++)
{
fscanf(fp,"%d,%f",&u[i].num,&u[i].price);
if(u[i].num='\0')
break;
p->num=u[i].num;
p->price=u[i].price;
p=p->next;
}
p->next=NULL;
}
/*TYPE * load()
{
FILE * fp;
TYPE * p,* q,* head;
int c=0;
if((fp=fopen("mk.txt","r"))==NULL)
{
printf("cannot open infile\n");
exit(0);
}
q=p=(TYPE *)malloc(sizeof (TYPE));
fscanf(fp,"%d,%f",&q->num,&q->price);
printf("1");
head=NULL;
while(q->num!=0)
{
c=c+1;
if(c==1) head=q;
else p->next=q;
p=q;
q=(TYPE *)malloc(sizeof (TYPE));
fscanf(fp,"%d,%f",&q->num,&q->price);
}
p->next=NULL;
fclose(fp);
return(head);
}*/
/*
for(p=head;p!=NULL;p=p->next)
{
if((fscanf(fp,"%d号菜,价格：%f\n",p->num,p->price)!=1))
printf("file write error\n");
fclose(fp);
}
*/
TYPE * creat()
{
TYPE * head;
TYPE * p1,* p2;
n=0;
p1=p2=(TYPE *)malloc(sizeof (TYPE));
scanf("%d,%f",&p1->num,&p1->price);
head=NULL;
while(p1->num!=0)
{
n=n+1;
if(n==1) head=p1;
else p2->next=p1;
p2=p1;
p1=(TYPE *)malloc(sizeof (TYPE));
scanf("%d,%f",&p1->num,&p1->price);
}
p2->next=NULL;
return(head);
}
void main()
{
TYPE *p,*t,*head,*q;
int i=1,k;
float b;
while(i)
{
menu();
scanf("%d",&i);
switch(i)
{
case 1:
printf("输入菜的编码和价格（num，price）\n");
//endinput;
head=creat();
for(p=head;p!=NULL;p=p->next)
{
printf("%d号菜,价格：%f\n",p->num,p->price);
}
break;
case 2:
printf("补充菜的编码与价格（num，price）\n");
for(p=head;p!=NULL;p=p->next)
{
if(p->next==NULL)
break;
}
t=(TYPE * )malloc(sizeof (TYPE));
scanf("%d,%f",&t->num,&t->price);
p->next=t;
p=t;
p->next=NULL;
for(p=head;p!=NULL;p=p->next)
{
printf("%d号菜,价格：%f\n",p->num,p->price);
}
break;
case 3:save(head);
//save();
break;
case 4:load(head);
for(p=head;p!=NULL;p=p->next)
{
printf("%d,%f\n",p->num,p->price);
}
break;
case 5:
printf("需要删除的菜的编号（num）\n");
scanf("%d",&k);
for(p=head;p!=NULL;q=p,p=p->next)
{
if(p->num==k)
break;
}
if(p->next!=NULL)
{
q->next=p->next;
free(p);
}
else
{
q->next=NULL;
free(p);
}
for(p=head;p!=NULL;p=p->next)
{
printf("%d号菜,价格：%f\n",p->num,p->price);
}
break;
case 6:
printf("需要修改的菜和的编号（num）\n");
scanf("%d",&k);
printf("需要修改的菜和的价格（price）\n");
scanf("%f",&b);
for(p=head;p!=NULL;p=p->next)
{
if(p->num==k)
break;
}
p->price=b;
for(p=head;p!=NULL;p=p->next)
{
printf("%d号菜,价格：%f\n",p->num,p->price);
}
break;
case 7:
printf("退出\n");
i=0;
break;
default:
printf("没有此选项~\(≧▽≦)/~啦啦啦\n");
}
}
printf("欢迎使用，再见！=v=\n");
}
我写了一个菜单程序，发现存入文件和读取文件时总是发生错误，不知道错在哪，求各位高手大大帮忙。。。。
程序写得很烂。。。求包涵。。。
[ 本帖最后由 腹黑伸手党 于 2011-12-30 21:44 编辑 ]
