帮我看下这个程序哪里的问题..
checking.h
-------------------------------
#ifndef checking_h
#define CHECKING_H
#include "account.h"
enum remit{remitbypost,remitbygable,other};
class checking:public account
{public:
checking(int accno,float balan=0.0);
virtual void withdrawal(float amount);
void setremit(remit re);
protected:
remit remittance;
};
#endif
checking.cpp
------------------
#include <iostream.h>
#include "account.h"
#include "checking.h"
checking::checking(int accno,float balan=0.0):account(accno,balan)
{ remittance=other;
}
virtual void checking::withdrawal(float amount)
{ float temp=amount;
if(remittance=remitbypost)
temp=amount+30;
else if(remittance=remitbygable)
temp=amount+60;
if(balance<temp)
cout<<"insufficient funds:balance "<<balance<<",withdrawal"<<temp<<endl;
else
balance-=temp;
}
void setremit(remit re)
{
int remittance=re;
}
savings.h
----------------------
#ifndef SAVINGS_H
#define SAVINGS_H
#include "account.h"
class savings:public account
{ public:
savings(int accno,float balan=0.0);
virtual void withdrawal(float amount);
protected:
static float minbalance;
};
#endif
savings.cpp
---------------------
#include <iostream.h>
#include "account.h"
#include "savings.h"
float savings::minbalance=500.0;
savings::savings(int accno,float balan=0.0):account(accno,balan)
{}
virtual void savings::withdrawal(float amount)
{ if(balance+minbalance<amount)
{ int temp; cout<<"insufficient funds:balan"<<balance<<",withdrawal"<<temp<<endl;}
else
balance-=amount;
}
编译提示:
D:\c++\银行\checking.cpp(5) : error C2572: 'checking::checking' : redefinition of default parameter : parameter 2
d:\c++\银行\checking.h(8) : see declaration of 'checking::checking'
D:\c++\银行\checking.cpp(10) : error C2723: 'withdrawal' : 'virtual' storage-class specifier illegal on function definition
savings.cpp
D:\c++\银行\savings.cpp(5) : error C2572: 'savings::savings' : redefinition of default parameter : parameter 2
d:\c++\银行\savings.h(6) : see declaration of 'savings::savings'
D:\c++\银行\savings.cpp(8) : error C2723: 'withdrawal' : 'virtual' storage-class specifier illegal on function definition
执行 cl.exe 时出错.
16.10.exe - 1 error(s), 0 warning(s)
account.h
这个没有问题...
请帮我看看这个是什么问题???
[解决办法]
checking::checking(int accno,float balan=0.0):account(accno,balan)
checking::checking(int accno,float balan):account(accno,balan)
默认参数只是在其声明时可见
[解决办法]
楼上说的意思就是那个缺省值0.0要去掉,因为缺省值只有在函数声明的时候才是合法的,你在类中声明这个函数的时候已经声明了这个缺省值,在实现的时候不要再写一次.
