C语言银行账户日常管理作业附源码Word文档下载推荐.docx
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structaccount*order(structaccount
*head);
根据账号对链表进行排序
8、保存数据和读取文件功能:
voidsave(structaccount
save函数实现保存功能,退出程序时自动保存数据,
再次执行程序时自动从根目录中读取文件数据。
三、调试过程中遇到的问题及解决方案
一个比较大的问题就是文件的存储和读取问题,在存储和读取过程中会出现好多意想不到的错误,并且很难查找出来。
存储相对比较容易实现,但是读取就比较困难,控制读取的结束就遇到了问题,试过好多方法,例如feof()函数,但是都不能解决问题,最后通过定义一个变量N计录账户数量,保存时将该变量N保存在文件的最开始,当读取是首先将这个变量N读取出来,然后用for循环通过N控制读取结束。
调试过程中还有好多小问题,基本都是由于马虎或者程序不够严谨造成的,这里就不一一列举了。
#include<
stdio.h>
#defineNULL0
#defineLENsizeof(structaccount)structaccount
{
longaccount_num;
longkey;
charname[20];
floatbalance;
structaccount*next;
};
intn;
int*k;
voidprint(structaccount*head)
structaccount*p;
p=head;
if(head==NULL){printf("
NODATA!
\n"
);
gotoloop1;
}printf("
\nNow,These%daccountsare:
n);
printf("
account_num name balance \n"
===================================\n"
if(head!
=NULL)do
printf("
%-15ld%-10s%-10.2f\n"
p->
account_num,p->
name,p->
balance);
p=p->
next;
}while(p!
=NULL);
loop1:
pressanykeyentermenu. \n"
getch();
clrscr();
}
structaccount*del(structaccount*head,longaccount_num)
structaccount*p1,*p2;
if(head==NULL)
{printf("
\ndatanull!
gotoend;
p1=head;
while(account_num!
=p1->
account_num&
&
p1->
next!
=NULL)
p2=p1;
p1=p1->
if(account_num==p1->
account_num)
if(p1==head)head=p1->
elsep2->
next=p1->
delete:
%ld\n"
account_num);
n--;
else
%ldnotbeenfound!
end:
return(head);
structaccount*find(structaccount*head,longaccount_num)
account_num:
p1->
account_num);
key:
key);
name:
%s\n"
name);
balance:
%f\n"
structaccount*withdrawal(structaccount*head,longaccount_num)
longkey1;
floatmoney;
pleaseinputkey:
"
scanf("
%ld"
&
key1);
if(key1==p1->
key){
howmuchdoyouwant:
%f"
money);
if(p1->
balance-money>
=0){ p1->
balance=p1->
balance-money
;
success!
elseprintf("
Youcannotdothis!
}/*if*/
keyerror!
clrscr();
structaccount*saving(structaccount*head,longaccount_num)
floatmoney;
if(head==NULL)
howmuchdoyouwanttosave:
p1->
balance+money;
\success!
structaccount*insert(structaccount*head,structaccount*new)
structaccount*p0,*p1,*p2;
p1=head;
p0=new;
if(head==NULL)
head=p0;
p0->
next=NULL;
while((p0->
account_num>
account_num)&
(p1->
=NULL))
}/*while*/
if(p0->
account_num<
if(head==p1)head=p0;
else
p2->
next=p0;
p0->
next=p1;
}/*else*/n=n+1;
structaccount*order(structaccount*head)
structaccount*p1,*p2,*p0,*p3,*headnew;
intm=0;
headnew=NULL;
while(head!
p0=p2=head;
p1=p0->
while(p1!
account_num)p0=p1;
if(p0==head)head=p0->
}m++;
while(p2->
=p0)p2=p2->
p2->
next=p0->
if(m==1)
headnew=p3=p0;
headnew->
{p3->
p3=p3->
p3->
return(headnew);
voidsave(structaccount*head)
{FILE*fp;
structaccount*p;
if((fp=fopen("
data"
"
wb"
))==NULL)
{printf("
cannotopenfile\n"
return;
fwrite(&
n,sizeof(int),1,fp);
while(p!
=NULL){
if(fwrite(p,sizeof(structaccount),1,fp)!
=1)printf("
filewriteerror\n"
p=p->
fclose(fp);
main()
structaccount*head,*new,*p,*p1;
FILE*fp;
longdel_num,account_num;
intj;
longpassword;
chari;
charuser[10];
charusername[10]="
admin"
head=NULL;
p1=p=(structaccount*)malloc(LEN);
fp=fopen("
rb+"
fread(&
if(n==0)gotoloop;
fread(p,sizeof(structaccount),1,fp);
head=p;
for(j=1;
j<
n;
j++)
{p1=(structaccount*)malloc(LEN);
fread(p1,sizeof(structaccount),1,fp);
p->
p=p1;
loop:
fclose(fp);
LogonNow:
username:
%s"
user);
\npassword:
password);
if(password!
=123456||strcmp(user,username)!
=0){printf("
passworderror!
pressanykeyclose. \n"
exit
(1);
}clrscr();
do
printf("
\n \n"
|1-InsertanewAccount |\n"
printf("
|2-ListallAccounts |\n"
|3-FindaAccount |\n"
|4-DeleteaAccount |\n"
|5-Withdrawal |\n"
|6-Saving |\n"
|Q-quit |\n"
\n"
PleaseinputKey\n"
i=getchar();
while(i=='
\n'
)i=getchar();
switch(i)
case'
1'
:
{clrscr();
\ninputtheinsertedrecord:
new=(structaccount*)malloc(LEN);
\n>
>
new->
scanf("
head=insert(head,new);
break;
2'
head=order(head);
print(head);
break;
3'
Pleaseinputaccount_num:
head=find(head,account_num);
4'
\ninputthedeletednumber:
del_num);
head=del(head,del_num);
5'
\ninputtheaccount_num:
head=withdrawal(head,account_num);
6'
head=saving(head,account_num);
q'
{
save(head);
exit
(1);
}while(i)/*while*/;