银行类运算

• class abank;
  class bbank;
  class cbank
  {
  	int balance;
  	public:
  		cbank(){balance=0;}
  		cbank(int b){balance=b;}
  		void getbalance(){int add;cin>>add;balance=balance+add;}
  		void dis(){cout<<balance<<endl;}
  		friend void total(abank,bbank,cbank);
  };
  
  class bbank
  {
  	int balance;
  	public:
  		bbank(){balance=0;}
  		bbank(int b){balance=b;}
  		void getbalance(){int add;cin>>add;balance=balance+add;}
  		void dis(){cout<<balance<<endl;}
  		friend void total(abank,bbank,cbank);
  };
    
  class abank
  {
  	int balance;
  	public:
  		abank(){balance=0;}
  		abank(int b){balance=b;}
  		void getbalance(){int add;cin>>add;balance=balance+add;}
  		void dis(){cout<<balance<<endl;}
  		friend void total(abank,bbank,cbank);
  };
  void total(abank a,bbank b,cbank c)
  {
  	cout<<"all money is:"<<a.balance+b.balance+c.balance<<endl;
  }
  
  int  main()
  {
  	cbank c(100);
  	bbank b;
  	abank a;
  	a.dis();
  	b.dis();
  	c.dis();
      a.getbalance();
      b.getbalance();
      c.getbalance();
  	a.dis();
  	b.dis();
  	c.dis();
          total(a,b,c);
  return 0;
  }

银行类运算

原文：http://wzsts.blog.51cto.com/10251779/1761560