编一个程序,画出以下抛物线 ①y=2x^2 ②y=2x^2-1 ③y=2(x-1)^2+1 ④2(x+1)^2-1 运行结果: 不考虑效率的话很简单,直接上代码: #include "pch.h" #include <iostream> #include"graphics.h" void zbz(int x) { line(x-50,350, x+50, 350); line(x, 250, x, 370); } void pw1() { double x = 0, y = 0; zbz(900); for (int...