import os import platform import sys from PyQt5.QtCore import * from PyQt5.QtGui import * from PyQt5.QtWidgets import * import numpy as np import matplotlib matplotlib.use("Qt5Agg") from matplotlib.backends.backend_qt5agg import FigureCanvasQTAg
菱形继承问题样例: #include <iostream> using namespace std; class A { public: ; virtual int getx() { return x; } }; class B:public A{}; class C:public A{}; class D:public B,public C{}; int main() { D d; //以下代码不会被任何编译器通过,因为存在菱形继承问题:不知道是调用B的getx函数,还是调用C的getx函数