python面向对象编程（很重要）

Posted 2021-01-06 masterhu

class LogicGate():
    def __init__(self,n):
        self.name=n
    def getname(self):
        return self.name
    def getoutput(self):
        output=self.out()
        return output
class BinaryGate(LogicGate):
    def __init__(self,n):
        super(BinaryGate,self).__init__(n)
        self.pinA=None
        self.pinB=None
    def getpinA(self):
        if self.pinA==None:
          return int(input(‘Enter pin A input for gate ‘+self.getname()+‘-->‘))
        else:
             return self.pinA.getfrom().out()

    def getpinB(self):
        if self.pinB==None:
          return int(input(‘Enter pin B input for gate ‘+self.getname()+‘-->‘))
        else:
            return self.pinB.getfrom().out()        #pinB不能去掉，如果去掉BinaryGate类没有getfrom方法,还是有点疑问

    def setnextpin(self, source):
        if self.pinA == None:
            self.pinA = source
        elif self.pinB == None:
            self.pinB = source
        else:
            print(‘Cannot Connect: NO EMPTY PINS on this gate‘)
class Unary(LogicGate):
    def __init__(self,n):
        super(Unary, self).__init__(n)
        self.pin=None
    def getpin(self):
        if self.pin==None:
          return int(input(‘Enter pin input for gate ‘+self.getname()+‘-->‘))
        else:
           return self.pin.getfrom().out()

    def setnextpin(self, source):
        if self.pin == None:
            self.pin = source
        else:
            print(‘Cannot Connect: NO EMPTY PINS on this gate‘)

class andgate(BinaryGate):
    def __init__(self,n):
        super(andgate,self).__init__(n)
    def out(self):
        self.pinA=self.getpinA()
        while (self.pinA != 0)and(self.pinA != 1):
            self.pinA = self.getpinA()
        self.pinB=self.getpinB()
        while (self.pinB != 0)and(self.pinB != 1):
            self.pinB = self.getpinB()
        return self.pinA & self.pinB


class OrGate(BinaryGate):
    def __init__(self,n):
        super(OrGate, self).__init__(n)
    def out(self):
        self.pinA=self.getpinA()
        while (self.pinA != 0)and(self.pinA != 1):
            self.pinA = self.getpinA()
        self.pinB=self.getpinB()
        while (self.pinB != 0)and(self.pinB != 1):
            self.pinB = self.getpinB()
        return self.pinA | self.pinB
class NotGate(Unary):
    def __init__(self,n):
        super(NotGate, self).__init__(n)
        self.pin=None
    def out(self):
        self.pin = self.getpin()
        while (self.pin != 0) and (self.pin != 1):
            self.pin = self.getpin()
        if self.pin==1:
            result=0
        elif self.pin==0:
            result=1
        else:
            print(‘input is an error!‘)
        return result

class Connector():
    def __init__(self,fromgate,togate):
        self.fromgate=fromgate
        self.togate=togate
        self.togate.setnextpin(self)       #连接器往下流选择pinA还是pinB
    def getfrom(self):
        return self.fromgate
    def getto(self):
        return self.togate

g1=andgate(‘G1‘)
g2=andgate(‘G2‘)
g3=OrGate(‘G3‘)
g4=NotGate(‘G4‘)
c1=Connector(g1,g3)
c2=Connector(g2,g3)
c3=Connector(g3,g4)
print(g4.out())