Source Code #include <stdio.h> #include <dos.h> #include <graphics.h> #include <conio.h> #define MAGFY 20 class Bline { private: int CEN_X,CEN_Y,radius,X,Y,i,j; public: void line1(int x1,int y1,int x2,int y2,int x3,int y3,int x4,int y4); }; void Bline::line1(int x1,int y1,int x2,int y2,int x3,int y3,int x4,int y4) { CEN_X = (x1+x2)/2 + (x3-x2)/2; CEN_Y = (y1+y2)/2 + (y3-y2)/2; //radius = (x1+x2)/2; for(;!kbhit();) { delay(300); cleardevice(); //1st box line(x1,y1,x2,y2); line(x1,y1-20,x2,y2-20); // line(x3,y3,x4,y4); line(x3,y3-20,x4,y4-20); // line(x1,y1,x4,y4); line(x1,y1-20,x4,y4-20); // line(x2,y2,x3,y3); line(x2,y2-20,x3,y3-20); // //2nd box line(x1,y1,x1,y1-20); line(x2,y2,x2,y2-20); line(x3,y3,x3,y3-20); line(x4,y4,x4,y4-20); //some point which will be moving around 3Dbox //line(x2+40,y2-20,x2+40,y2-20); //rectangle(x2,y2,x4,y4); //1st Quadrant if(x1>CEN_X &...
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