1. Review Finish program Graphics Programming
Computer Science
Review
Finish program
Graphics
Programming

2. Determine the Range of Values the following code generates
Random(9) + 1
Random(12) – 4
Random(25) + 6
2*random(7) + 10
2*random(12) -1
3*random(6) + 4

3. Write the code to generate the following ranges
10 to 22 even
7 to 17 odd
12 to 40 by 4’s
Flipping a coin
Rolling a pair of 6-sided dice.

4. Program options. Random
Flip a coin 100 times and count how many heads, tails
Show how many heads and tails occurred and which occurred most often
Roll a pair of dice 100 times and tell which occurred most often, a 3 or an 11.
Math tutor
User enters how many practice problems
Program shows practice addition problems, gets the users guesses and tells the user how many they guessed correctly.

5. Number from 0-... Or some color constants (RED, BLUE, GREEN, …)
1920
1080
(0,0)
(1920, 1080)
Graphics in Pascal
Screen size: 1920x 1080
Might be larger with this version of Pascal.
Upside down Cartesian plane
Change the screen to graphics mode
Use the program graph1.pas from the website.
Save it to your Computer Science 1 Folder before running
Number from Or some color constants (RED, BLUE, GREEN, …)

6. Open this program, save it to your folder and modify it.
Program Lesson8_Program1;
Uses
Crt,Graph;
Var
GraphicsDriver, GraphicsMode, ErrCode: smallint;
Begin
Writeln('Initialising Graphics, please wait...');
GraphicsDriver := Detect;
InitGraph(GraphicsDriver, GraphicsMode,'');
ErrCode := GraphResult;
If GraphResult <> grOK then
ClrScr;
Writeln('Graphics error occured: ', GraphErrorMsg(ErrCode));
Halt(1);
End;
//Enter graphics commands here
readln;
Closegraph();
End.
This is graphy1.pas.
Open this program, save it to your folder and modify it.
This code must go at the beginning of a program that uses the graphics commands

7. Some Pascal Graphics Commands
Some Commands
SetColor(Integervariable);
Circle(x, y, radius);
ClearViewPort; //Like clearscreen
Outtext(x, y, ‘String you will show on the screen’);
Line(x1, y1, x2, y2);
Lineto(x,y);
Putpixel(x, y, ColorValue);
Rectangle(x1, y1, x2, y2);
Ellipse(x, y, Start Degrees, End Degrees, Horizontal Radius, Vertical Radius);
Colorvariable:=getpixel(x, y);

8. What does this do?

9. Today First graphics program Inside circle program:
Face
Stick figure
House
Inside circle program:
Input: The (x,y) coordinate and center of a circle. Also the (x2,y2) coordinates of another point
Output: Whether or not the point is inside the circle. (Hint: Use the distance formula)
Push: In addition, show this graphically
Intersecting circles program:
Input: x, y and radius for two circles.
Output whether or not the circles intersect.
Push: Add graphics