2 immortalyoung immortalyoung 于 2015.06.15 09:53 提问

C++从文件中输出类时重复输出的问题

#ifndef CLASSDEF_H
#define CLASSDEF_H

class MoneyData
{
public:
int year;
int month;
int day;
char remark[80];
char PI[40];
char BankAccount[20];
char form[15];
char direction[5];
double Change;
double Cash;
double Saving;
static double TotalCash;
static double TotalSavings;
static double TotalChange;
};

#endif

#include
#include
#include
#include"ClassDef.h"
using namespace std;

void Inquire(const char *filename)
{
char choice;
MoneyData money;
int m, d;
char pi[40];
char bankaccount[20];
cout << " ●财务信息管理系统●\n";
cout << "●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●\n";
cout << "● 账目查询 ●\n";
cout << "●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●\n";
fstream fdat(filename, ios::in);
if (!fdat)
{
cout << "账目不存在,请进行初始化操作!" << endl;
return;
}
while (1)
{
fdat.seekg(0, ios::beg);
cout << "请选择需要查询的信息:" << endl;
cout << "1:按月查询\t" << "2:按日查询\t"<< "3:按订单查询\t"<<"4:按银行账号查询\t"<<"5:按现金查询\t"<<"6:查询总额\t" << "Q:返回" << endl;
cin >> choice;
cout << "=====================================================================" << endl;
switch (choice)
{
case'1':
{
int work = 0;
fdat.seekg(0, ios::beg);
cout << "请输入月份:";
cin >> m;
cout << "=====================================================================" << endl;
do
{
fdat.read((char *)&money, sizeof(MoneyData));
if (money.month == m)
{
cout << money.year << "." << money.month << "." << money.day << "\nPI:"
<< money.PI << "\nForm:" << money.form << "\nBankaccount:" << money.BankAccount << "\nDirection:"
<< money.direction << "\nMoney:" << money.Change << "\nRemark:" << money.remark << endl;
work = 1;
}
} while (fdat.peek() != EOF); //这里是循环的判定
if (work=0)
{
cout << "当月没有款项变动" << endl;
continue;
}
break;
}
case'2':
{
int work = 0;
fdat.seekg(0, ios::beg);
cout << "请输入月份和日期:";
cin >> m >> d;
cout << "=====================================================================" << endl;
do
{
fdat.read((char *)&money, sizeof(MoneyData));
if (money.month == m&&money.day==d)
{
cout << money.year << "." << money.month << "." << money.day << "\nPI:"
<< money.PI << "\nForm:" << money.form << "\nBankaccount:" << money.BankAccount << "\nDirection:"
<< money.direction << "\nMoney:" << money.Change << "\nRemark:" << money.remark << endl;
work = 1;
}
} while (fdat.peek() != EOF);
if (work = 0)
{
cout << "当日没有款项变动" << endl;
continue;
}
break;
}
case'3':
{
int work = 0;
fdat.seekg(0, ios::beg);
cout << "请输入订单号:";
cin >> pi;
cout << "=====================================================================" << endl;
do
{
fdat.read((char *)&money, sizeof(MoneyData));
if (!strcmp(money.PI, pi))
{
cout << money.year << "." << money.month << "." << money.day << "\nPI:"
<< money.PI << "\nForm:" << money.form << "\nBankaccount:" << money.BankAccount << "\nDirection:"
<< money.direction << "\nMoney:" << money.Change << "\nRemark:" << money.remark << endl;
work = 1;
}
} while (fdat.peek() != EOF);
if (work = 0)
{
cout << "没有该订单相关信息" << endl;
continue;
}
break;
}
case'4':
{
int work = 0;
fdat.seekg(0, ios::beg);
cout << "请输入银行账号:";
cin >> bankaccount;
cout << "=====================================================================" << endl;
do
{
fdat.read((char *)&money, sizeof(MoneyData));
if (!strcmp(money.BankAccount, bankaccount))
{
cout << money.year << "." << money.month << "." << money.day << "\nPI:"
<< money.PI << "\nForm:" << money.form << "\nBankaccount:" << money.BankAccount << "\nDirection:"
<< money.direction << "\nMoney:" << money.Change << "\nRemark:" << money.remark << endl;
work = 1;
}
} while (fdat.peek() != EOF);
if (work = 0)
{
cout << "没有该银行账号的存款变动信息" << endl;
continue;
}
break;
}
case'5':
{
int work = 0;
fdat.seekg(0, ios::beg);
cout << "现金变动信息如下:";
do
{
fdat.read((char *)&money, sizeof(MoneyData));
if (!strcmp(money.form, "Cash"))
{
cout << money.year << "." << money.month << "." << money.day << "\nPI:"
<< money.PI << "\nForm:" << money.form << "\nBankaccount:" << money.BankAccount << "\nDirection:"
<< money.direction << "\nMoney:" << money.Change << "\nRemark:" << money.remark << endl;
work = 1;
}
} while (fdat.peek() != EOF);
if (work = 0)
{
cout << "没有现金变动信息" << endl;
continue;
}
break;
}
case'6':
{
fdat.seekg(0, ios::end);
fdat.read((char *)&money, sizeof(MoneyData));
cout << "总现金变动:" << MoneyData::TotalCash << endl;
cout << "总存款变动:" << MoneyData::TotalSavings << endl;
cout << "总款额变动:" << MoneyData::TotalChange << endl;
break;
}
case'q':
case'Q':cout << "返回主菜单" << endl; return;
default:cout << "没有该操作选项,请重新输入" << endl;
}
}
}

请各位大神相助!这里按我现在的判定语句是会重复输出的。我尝试过其他的方法判定,例如直接fdat>>...>>...但是这样不知道为什么连正常输出都不行。
请各位高手帮我修改一下,感激不尽!!!!

2个回答

ycg514230
ycg514230   Rxr 2015.06.15 10:32

你这样贴代码还不如贴图的方式,这样很难有人看得清楚,而且你也没有把打印的结果贴出来,
很难一下定位出问题的地方在哪里。
其实debug也是程序员的一种综合技能,学会了也能提高你的能力。
具体到你这个程序。你这里的问题是if (work = 0),这样判断无效,所以会重复。
这是对work进行赋值,应该改成if (work == 0)。

望采纳,希望能帮到你。

star890124
star890124   2015.06.15 10:04

debug,然后看判定条件是否正确。你这样直接贴代码,没人会看的

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