shengchan.h

汽车生产公司系统管理程序 是为解决一个汽车生产公司的电脑化管理问题的系统管理程序

//shengchan.h

class vehicle
{
  public:	
	int amount;
};
 
class car:public vehicle
{
  public:
	  car(){}
};

class truck:public vehicle
{
  public:	
	  truck(){}
};

class tractor:public vehicle
{
  public:	
	  tractor(){}
};
 
void choice();

void making();