program circleAlexGxx;
uses crt,graph;
Label 1;
var i,stad:integer;
gd,gm:integer;
x,y,r1,r2,dx,dy:integer;
c:char;
S,B,K,H,xx,yy,x1,x2,y1,y2,rs:real;
xc,yc,xc1,xc2,yc1,yc2,l1,l,ang:real;
a:real;
BEGIN
x:=320;
y:=240;
dx:=0;
dy:=0;
r1:=0;
r2:=0;
rs:=0;

stad:=1;
i:=1;
1:
clrscr;
if (stad=1)  then
begin
textcolor(white);
gotoxy (1,1);
Writeln ('BBEDUTE DAHHbIE');


if (i=1) then
textcolor(green) else textcolor(white);
gotoxy (1,4);
Writeln ('R1(radius 1 okr.)= ',r1,' Max 140');
if (i=2) then
textcolor(green) else textcolor(white);
gotoxy (1,5);
Writeln ('R2(radius 2 okr.)= ',r2,' Max 140');
if (i=3) then
textcolor(green) else textcolor(white);
gotoxy (1,6);
Writeln ('dX(rasstojanie mezhdu okr po osi X)= ',dx,' Max ',2*x-R1*2-R2*2);
if (i=4) then
textcolor(green) else textcolor(white);
gotoxy (1,7);
Writeln ('dY(rasstojanie mezhdu okr po osi Y)= ',dy,' Max ',2*y-R1*2-R2*2);
if (i=5) then
textcolor(green) else textcolor(white);
gotoxy (1,8);
Writeln ('RS(radius sopriazhenia)= ',round(rs),' Min 100');
if (i=6) then
textcolor(green) else textcolor (white);
gotoxy (1,9);
Writeln ('Paint');
gotoxy (1,20);
if (i=7) then
textcolor(green) else textcolor(white);
gotoxy (1,11);
Writeln ('EXIT');

gotoxy (4,15);
textcolor (10);
writeln ('Vipolnil');
gotoxy (4,16);
writeln ('student 2 kursa');
gotoxy (4,17);
writeln ('grup 3121b');
gotoxy (4,18);
writeln ('Gridnev Alexandr');
gotoxy (2,21);
writeln ('Voronezh 2011');


c:=readkey;
if (ord(c)=72) then i:=i-1;
if (ord(c)=80) then i:=i+1;
if (ord(c)=13) then stad:=2;
if (ord(c)=27) then  stad:=3;
if (i=8) then i:=1;
if (i=0) then i:=7;
goto 1;
end;
if (stad=2) then
begin
clrscr;
case i of
1: begin gotoxy (30,6); textcolor (white); Write('[',Round(r1),'] R1= '); readln (r1); stad:=1; goto 1; end;
2: begin gotoxy (30,6); textcolor (white); Write('[',Round(r2),'] R2= '); readln (r2); stad:=1; goto 1; end;
3: begin gotoxy (30,6); textcolor (white); Write('[',round(dx),'] dX= '); readln (dx); stad:=1; goto 1; end;
4: begin gotoxy (30,6); textcolor (white); Write('[',round(dy),'] dy= '); readln (dy); stad:=1; goto 1; end;
5: begin gotoxy (30,6); textcolor (white); Write('[',round(rs),'] RS= '); readln (Rs); stad:=1; goto 1; end;
6: begin gotoxy (30,6); stad:=3; goto 1; end;
7: begin gotoxy (30,6); stad:=4; goto 1; end;
end;
end;
{readln;    }
if (stad=4) then
begin

Detectgraph (gd,gm);

Initgraph (gd,gm,'');
setcolor(green);
Line (2,2,638,2);
Line (2,2,2,478);
Line (638,2,626,8);
Line (638,2,626,-6);
Line (2,478,6,470);
Line (2,478,-5,470);
outtextXY(4,4,'O');
outtextXY (630,7,'X');
outtextXY (4,470,'Y');
setcolor (red);
circle (x-round(dx/2),y+round(dy/2),r1);
circle (x+round(dx/2),y-round(dy/2),r2);
circle (x-round(dx/2),y+round(dy/2),2);
circle (x+round(dx/2),y-round(dy/2),2);
readln;
setcolor(white);


x1:=x-round(dx/2);  writeln ('x1=',x1:3:0);
y1:=y+round(dy/2);  writeln ('y1=',y1:3:0);
x2:=x+round(dx/2);  writeln ('x2=',x2:3:0);
y2:=y-round(dy/2);  writeln ('y2=',y2:3:0);
{===============================}
S:=sqrt(sqr(x2-x1)+sqr(y2-y1));
writeln ('S=',s:4:2);

B:=(sqr(rs-r2)-sqr(rs-r1)+sqr(s))/(2*s);  write ('B= ',B:3:2);
k:=s-b;
H:=sqrt(sqr(rs-r2)-sqr(b));
xx:=round(x1+(x2-x1)/(s/k));
yy:=round(y1+(y2-y1)/(s/k));

xc:=round(xx-(yy-y2)*H/B);
yc:=round(yy+(xx-x2)*H/B);
xc:=round(xx+(yy-y2)*H/B);
yc:=round(yy-(xx-x2)*H/B);


a:=sqrt(sqr((xc+rs)-x2)+sqr(yc-y2));

setcolor(green);
circle (round(xc),round(yc),2);
ang:=0;
xc1:=0;
yc1:=0;
xc2:=0;
yc2:=0;
while ang<(pi*2) do begin
PutPIxel (round(x1+r1*cos(ang)),round(y1+r1*sin(ang)),white);
PutPIxel (round(x2+r2*cos(ang)),round(y2+r2*sin(ang)),white);
if (round(xc+rs*cos(ang))=round(x1+r1*cos(ang))) then xc1:=round(xc+rs*cos(ang));
if (round(yc+rs*sin(ang))=round(y1+r1*sin(ang))) then yc1:=round(yc+rs*sin(ang));
if (round(xc+rs*cos(ang))=round(x2+r2*cos(ang))) then xc2:=round(xc+rs*cos(ang));
if (round(yc+rs*sin(ang))=round(y2+r2*sin(ang))) then yc2:=round(yc+rs*sin(ang));
ang:=ang+0.005;
end;
ang:=0;
while ang<(pi*2) do begin
if (round(yc+rs*sin(ang))<yc1) and (round(xc+rs*cos(ang))<xc2)  then
PutPixel (round(xc+rs*cos(ang)),round(yc+rs*sin(ang)),white);
ang:=ang+0.003;
end;
readln;
stad:=1;
restoreCrtmode;
goto 1;
end;
readln;
if (stad=3) then
end.