#include<bits/stdc++.h> using namespace std; struct point { double x,y; point(double A,double B){ x = A, y = B; } point() = default; }; struct line { point point_A,point_B; line(point A,point B){ point_A = A,point_B = B; } line() = default; }; point findMeetingPoint(line line_A,line line_B){ p...