Write a graphics program that prompts

the user to enter graphics objects using the mouse or/and the keyboard.

Draw these graphics objectsq make calculations and print out the results .

Your program must be tested with an example given after every task.

13. Enter a triangle and find a point placed inside it

what i do:

Code:#include <cmath> using namespace std; #include "ccc_win.h" int ccc_win_main() { //imput 3 points Point a=cwin.get_mouse("Click on the first point:"); cwin << a; Point b=cwin.get_mouse("Click on the second point:"); cwin << b; Point c=cwin.get_mouse("Click on the third point:"); cwin << c; // lines Line l1(a,b); Line l2(b,c); Line l3(c,a); // geting coordinates of the points double x1=a.get_x(); double y1=a.get_y(); double x2=b.get_x(); double y2=b.get_y(); double x3=c.get_x(); double y3=c.get_y(); // determine the length of the external sides double dist1=sqrt(sqrt(x1-x2) + sqrt(y1-y2)); double dist2=sqrt(sqrt(x2-x3) + sqrt(y2-y3)); double dist3=sqrt(sqrt(x3-x1) + sqrt(y3-y1)); //result triangle cwin << a << b << c << l1 << l2 << l3; Point d=cwin.get_mouse("Click on the trinagle:"); double x4=d.get_x(); double y4=d.get_y(); Line l4(a,d); Line l5(b,d); Line l6(c,d); // determine the length of the internal lines double dist4=sqrt(sqrt(x1-x4) + sqrt(y1-y4)); double dist5=sqrt(sqrt(x2-x4) + sqrt(y2-y4)); double dist6=sqrt(sqrt(x3-x4) + sqrt(y3-y4)); // limits the point in the range of the triangle double s=sqrt((dist1+dist2-dist3)*(dist1-dist2+dist3)*(-dist1+dist2+dist3)*(dist1+dist2+dist3))*0.25; double s1=sqrt((dist1+dist5-dist4)*(dist1-dist5+dist4)*(-dist1+dist5+dist4)*(dist1+dist5+dist4))*0.25; double s2=sqrt((dist2+dist6-dist5)*(dist2-dist6+dist5)*(-dist2+dist6+dist5)*(dist2+dist6+dist5))*0.25; double s3=sqrt((dist3+dist4-dist6)*(dist3-dist4+dist6)*(-dist3+dist4+dist6)*(dist3+dist4+dist6))*0.25; if (fabs(s-(s1+s2+s3))<1e-6) cwin << d; else cwin << Message (Point(0,0),"the point must be inside the triangle!"); return 0; }