In computer graphic, C++ provide graphic.h through which objects can be created and by using this objects flying bird can be created in C++ program.
Functions used in this program are as follows:
- line(): The line function is used to draw a line.
Syntax:
line(x1, y1, x2, y2);
where, (x1, y1) (x2, y2) are end points of the line.
- arc(): The arc function is used to draw an arc.
Syntax:
arc(x, y, start_angle, end_angle, r);
where, (x, y) are centre of the arc, start_angle is the starting angle, end_angle is the ending angle and r is the radius of angle.
- circle(): The circle function is used to draw a circle.
Syntax:
circle(x, y, r);
where, (x, y) is the centre points and r is the radius of the circle.
- delay(): The delay function is used to stop the screen for a certain time as the execution of program is very fast.
Syntax:
delay(n);
where, n is number of seconds you want to stop the screen.
- cleardevice(): The cleardevice function is used to clear the screen.
- closegraph(): The closegraph function is used to close the graph.
Below is the C++ program implementing flying bird using graphics.h:
// C++ program implementing flying bird using graphics.h #include <conio.h> #include <dos.h> #include <graphics.h> #include <iostream.h> // Wings void handDown( int i)
{ line(85 + i, 155, 45 + i, 185);
line(85 + i, 155, 115 + i, 195);
arc(90 + i, 130, 228, 292, 70);
} void handUp( int i)
{ line(85 + i, 155, 125 + i, 115);
line(85 + i, 155, 55 + i, 118);
arc(90 + i, 177, 60, 122, 70);
} // Driver code void main()
{ int gd = DETECT, gm;
// Path of the BGI folder
initgraph(&gd, &gm, "C:\\TURBOC3\\BGI" );
int i = 0;
for (i = 0; i < 400; i++) {
// Body
circle(150 + i, 150, 20);
arc(90 + i, 190, 50, 145, 60);
arc(87 + i, 117, 220, 320, 60);
// Beak
line(170 + i, 147, 180 + i, 153);
line(180 + i, 153, 170 + i, 156);
// Eye
circle(162 + i, 150, 2);
// Tail
line(10 + i, 155, 40 + i, 155);
line(10 + i, 145, 40 + i, 155);
line(10 + i, 165, 40 + i, 155);
// Move hands
if (i % 2 == 0)
handUp(i);
else
handDown(i);
// Stop the screen for 10 secs
delay(10);
// Clear the screen
}
cleardevice();
getch();
// Close the graph
closegraph();
} |
Output: