c++各位帮帮忙啊

[Laozql]

大家看下为什么下面总是有错误啊！

#include<iostream>
using namespace std;
class Dialposition;
class Wiperspeed{
private:
int wiperspeed;
public:
Wiperspeed(int speed=0)
{
wiperspeed=speed;
}
void changewiperspeed(int A,int B)
{
if(A==0)
wiperspeed=0;
else if(A==1)
{
if(B==0)
wiperspeed=4;
else if(B==1)
wiperspeed=6;
else
wiperspeed=12;
}
else if(A==2)
wiperspeed=30;
else
wiperspeed=60;
}
void sensechange(int A,int B)
{
changewiperspeed(A,B);
}
int getwiperspeed()
{
return wiperspeed;
}
};
class Leverposition{
private:
int leverposition;
public:
Leverposition(int lever=0)
{
leverposition=lever;
}
void Senseleverup(Dialposition A,Wiperspeed B)
{
if(leverposition==3)
cout<<"You have been on top Lever!"<<endl;
else
{
leverposition++;
B.sensechange(leverposition,A.getdialposition());
}
}
void Senseleverdown(Dialposition A,Wiperspeed B)
{
if(leverposition==0)
cout<<"You have been on the lowest Lever!"<<endl;
else
{
leverposition--;
B.sensechange(leverposition,A.getdialposition());
}

}
int getleverposition()
{
return leverposition;
}
};
class Dialposition{
private:
int dialposition;
public:
Dialposition(int dial=0)
{
dialposition=dial;
}
void Sensedialup(Leverposition &A,Wiperspeed &B)
{
if(dialposition==2)
cout<<"You have been the top Dial!"<<endl;
else
{
dialposition++;
B.sensechange(A.getleverposition(),dialposition);
}
}
void Sensedialdown(Leverposition &A,Wiperspeed &B)
{
if(dialposition==0)
cout<<"You have been on the lowest Dial!"<<endl;
else
{
dialposition--;
B.sensechange(A.getleverposition(),dialposition);
}
}
int getdialposition()
{
return dialposition;
}
};
void show(Wiperspeed &A,Dialposition &B,Leverposition &C)
{
cout<<"Lever position is:"<<C.getleverposition()<<endl;
cout<<"Dial position is:"<<B.getdialposition()<<endl;
cout<<"Wiper speed is:"<<A.getwiperspeed()<<endl;
}
void menu()
{
cout<<"\t\t.......1:Leverup........."<<endl;
cout<<"\t\t.......2:Leverdown......."<<endl;
cout<<"\t\t.......3:Dialup.........."<<endl;
cout<<"\t\t.......4:Dialdown........"<<endl;
cout<<"\t\t.......0:quit............"<<endl;
}
int main()
{
Dialposition B;
Leverposition C;
Wiperspeed A;
show(A,B,C);
int n;
do{
cout<<"Please input the operation:"<<endl;
menu();
cin>>n;
switch(n)
{
case 1:C.Senseleverup(B,A);break;
case 2:C.Senseleverdown(B,A);break;
case 3:B.Sensedialup(C,A);break;
case 4:B.Sensedialdown(C,A);break;
}
show(A,B,C);
}while(n!=0);
return 0;
}

[Non_Recursive]

发错误提示..

[jeanie]

问题：class Dialposition和class Leverposition互相引用了对方的对象，
虽然在前面声明了类Dialposition，但是仍不能使用这个类里的成员函数。因为声明的时候并不知道类中有什么。
需要把这两个类的成员函数的实现都拿出来，放在这两个类的下面实现。也就是在类的定义都完成了，再实现他们的成员函数。

[就呆在云上]

耦合太紧了
呵呵
我注释了两行
可以编译通过，你看看再怎么修改吧

#include <iostream> 
using namespace std; 
class Dialposition; 
class Wiperspeed{ 
private: 
	int wiperspeed; 
public: 
	Wiperspeed(int speed=0) 
	{ 
		wiperspeed=speed; 
	} 
	void changewiperspeed(const int &A,const int &B) 
	{ 
		if(A==0) 
			wiperspeed=0; 
		else if(A==1) 
		{ 
			if(B==0) 
				wiperspeed=4; 
			else if(B==1) 
				wiperspeed=6; 
			else 
				wiperspeed=12; 
		} 
		else if(A==2) 
			wiperspeed=30; 
		else 
			wiperspeed=60; 
	} 
	void sensechange(const int &A,const int &B) 
	{ 
		changewiperspeed(A,B); 
	} 
	int getwiperspeed() 
	{ 
		return wiperspeed; 
	} 
}; 
class Leverposition{ 
private: 
	int leverposition; 
public: 
	Leverposition(int lever=0) 
	{ 
		leverposition=lever; 
	} 
	int retleverposition() {
		return leverposition;
	}
	void Senseleverup(Dialposition &A,Wiperspeed &B) 
	{ 
		if(leverposition==3) 
			cout <<"You have been on top Lever!" <<endl; 
		else 
		{ 
			leverposition++; 
			//B.sensechange(this->retleverposition(), A.getdialposition()); 
		} 
	} 
	void Senseleverdown(Dialposition &A,Wiperspeed &B) 
	{ 
		if(leverposition==0) 
			cout <<"You have been on the lowest Lever!" <<endl; 
		else 
		{ 
			leverposition--; 
			//B.sensechange(this->retleverposition(), A.getdialposition()); 
		} 

	} 
	int getleverposition() 
	{ 
		return leverposition; 
	} 
}; 
class Dialposition{ 
private: 
	int dialposition; 
public: 
	Dialposition(int dial=0) 
	{ 
		dialposition=dial; 
	} 
	void Sensedialup(Leverposition &A,Wiperspeed &B) 
	{ 
		if(dialposition==2) 
			cout <<"You have been the top Dial!" <<endl; 
		else 
		{ 
			dialposition++; 
			B.sensechange(A.getleverposition(),dialposition); 
		} 
	} 
	void Sensedialdown(Leverposition &A,Wiperspeed &B) 
	{ 
		if(dialposition==0) 
			cout <<"You have been on the lowest Dial!" <<endl; 
		else 
		{ 
			dialposition--; 
			B.sensechange(A.getleverposition(),dialposition); 
		} 
	} 
	int getdialposition() 
	{ 
		return dialposition; 
	} 
}; 
void show(Wiperspeed &A,Dialposition &B,Leverposition &C) 
{ 
	cout <<"Lever position is:" <<C.getleverposition() <<endl; 
	cout <<"Dial position is:" <<B.getdialposition() <<endl; 
	cout <<"Wiper speed is:" <<A.getwiperspeed() <<endl; 
} 
void menu() 
{ 
	cout <<"\t\t.......1:Leverup........." <<endl; 
	cout <<"\t\t.......2:Leverdown......." <<endl; 
	cout <<"\t\t.......3:Dialup.........." <<endl; 
	cout <<"\t\t.......4:Dialdown........" <<endl; 
	cout <<"\t\t.......0:quit............" <<endl; 
} 
int main() 
{ 
	Dialposition B; 
	Leverposition C; 
	Wiperspeed A; 
	show(A,B,C); 
	int n; 
	do{ 
		cout <<"Please input the operation:" <<endl; 
		menu(); 
		cin>>n; 
		switch(n) 
		{ 
		case 1:C.Senseleverup(B,A);break; 
		case 2:C.Senseleverdown(B,A);break; 
		case 3:B.Sensedialup(C,A);break; 
		case 4:B.Sensedialdown(C,A);break; 
		} 
		show(A,B,C); 
	}while(n!=0); 
	return 0; 
}

[帅得不敢出门]

Dialposition 这个类的定义在哪 你要包含进去的.

[bbb332]

关注！！

[踏岸寻柳]

看起来确实有些乱 。

[tocreat]

#include <iostream> 
using namespace std; 

class Wiperspeed;
class Dialposition; 
//////////////////////类及其函数声明
class Leverposition{ 
private: 
	int leverposition; 
public: 
	Leverposition(int lever=0)
	{ 
		leverposition=lever; 
	}
	void Senseleverup(Dialposition A,Wiperspeed B); 
	void Senseleverdown(Dialposition A,Wiperspeed B);
	int getleverposition(); 
};

/////////////////////
class Wiperspeed{ 
private: 
	int wiperspeed; 
public: 
	Wiperspeed(int speed=0) 
	{ 
		wiperspeed=speed; 
	} 
	void changewiperspeed(int A,int B) 
	{ 
		if(A==0) 
			wiperspeed=0; 
		else if(A==1) 
		{ 
			if(B==0) 
				wiperspeed=4; 
			else if(B==1) 
				wiperspeed=6; 
			else 
				wiperspeed=12; 
		} 
		else if(A==2) 
			wiperspeed=30; 
		else 
			wiperspeed=60; 
	} 
	void sensechange(int A,int B) 
	{ 
		changewiperspeed(A,B); 
	} 
	int getwiperspeed() 
	{ 
		return wiperspeed; 
	} 
}; 

////////////////////////////////
class Dialposition{ 
private: 
	int dialposition; 
public: 
	Dialposition(int dial=0) 
	{ 
		dialposition=dial; 
	} 
	void Sensedialup(Leverposition &A,Wiperspeed &B) 
	{ 
		if(dialposition==2) 
			cout<<"You have been the top Dial!"<<endl; 
		else 
		{ 
			dialposition++; 
			B.sensechange(A.getleverposition(),dialposition); 
		} 
	} 
	void Sensedialdown(Leverposition &A,Wiperspeed &B) 
	{ 
		if(dialposition==0) 
			cout<<"You have been on the lowest Dial!"<<endl; 
		else 
		{ 
			dialposition--; 
			B.sensechange(A.getleverposition(),dialposition); 
		} 
	} 
	int getdialposition() 
	{ 
		return dialposition; 
	} 
}; 
/////////////////////////////////
//Leverposition类定义

void Leverposition::Senseleverup(Dialposition A,Wiperspeed B) 
{ 
	if(leverposition==3) 
		cout<<"You have been on top Lever!"<<endl; 
	else 
	{ 
		leverposition++; 
		B.sensechange(leverposition,A.getdialposition()); 
	} 
} 
void Leverposition::Senseleverdown(Dialposition A,Wiperspeed B) 
{ 
	if(leverposition==0) 
		cout<<"You have been on the lowest Lever!"<<endl; 
	else 
	{ 
		leverposition--; 
		B.sensechange(leverposition,A.getdialposition()); 
	} 
	
} 
int Leverposition::getleverposition() 
{ 
	return leverposition; 
} 


void show(Wiperspeed &A,Dialposition &B,Leverposition &C) 
{ 
	cout<<"Lever position is:"<<C.getleverposition()<<endl; 
	cout<<"Dial position is:"<<B.getdialposition()<<endl; 
	cout<<"Wiper speed is:"<<A.getwiperspeed()<<endl; 
} 
void menu() 
{ 
	cout<<"\t\t.......1:Leverup........."<<endl; 
	cout<<"\t\t.......2:Leverdown......."<<endl; 
	cout<<"\t\t.......3:Dialup.........."<<endl; 
	cout<<"\t\t.......4:Dialdown........"<<endl; 
	cout<<"\t\t.......0:quit............"<<endl; 
} 
int main() 
{ 
	Dialposition B; 
	Leverposition C; 
	Wiperspeed A; 
	show(A,B,C); 
	int n; 
	do{ 
		cout<<"Please input the operation:"<<endl; 
		menu(); 
		cin>>n; 
		switch(n) 
		{ 
		case 1:C.Senseleverup(B,A);break; 
		case 2:C.Senseleverdown(B,A);break; 
		case 3:B.Sensedialup(C,A);break; 
		case 4:B.Sensedialdown(C,A);break; 
		} 
		show(A,B,C); 
	}while(n!=0); 
	return 0; 
}

[Laozql]

up

[Laozql]

谢谢啊！