@@ -0,0 +1,453 @@
+package ru.ematveev.square;%0A%0Apublic class Square%7B%0A%0A%09public int a;%0A%09public int b;%0A%09public int c;%0A%0A%09public Square(int a, int b, int c)%7B%0A%0A%09%09this.a = a;%0A%09%09this.b = b;%0A%09%09this.c = c;%0A%09%7D%0A%0A%09public double calculate(int x)%7B%0A%0A%09%09double y = a * x * x + b * x + c;%0A%0A%09%09return y;%0A%0A%09%7D%0A%0A%09public void show(int start, int finish, int step)%7B%0A%0A%0A%09%09%09for(int i = 0; i %3C= finish; i = i + step)%7B%0A%0A%09%09%09%09System.out.println(calculate(start));%0A%0A%09%09%09%09start = start + step;%0A%0A%09%09%7D%0A%0A%09%7D%0A%7D%0A%0A%09%09

add file Square.java