REAL REMAINDER- An Interactive Tool For Math Lovers

CSE - 102 PROJECT

Authors:

• 2005011 Md. Tanvirul Islam Turad
• 2005026 Md. Jakaria Hossain

Project Details:

It's an interactive tool for math lovers. It has 2 different parts.

1. Graphing calculator

2. Ellastic Collision simulation

1. Graphing Calculator:

To make or see the graphical representation of an equation, we can use this tool.

Key Features:

• User can see the coordinates of any position by left clicking , and hide by right clicking.

• User can give input from keyboard as equation and see output or graph of that equation .

• By clicking Enter equation here , user enters equation mode ( mode_eqn ). Now the program is ready to take input.

• Co-efficients of that equation can be Negative or Decimal.

• After pressing ENTER , graph of that equation is shown.

• There is 3 more options while an equation is selected.

  1. Choosing different color.
  2. That equation will be shown or not.
  3. Moving ball of that equation.

• Maximum number of equation is defined in the beginning of the code. User can add this number of equations.

• User can SAVE one or more equations as a project giving a filename. That file is saved as text file.

• User can also OPEN an existing project by entering the name of that file (without extension) . This filename must exist in the directory of the program.

  A project is saved in fun.txt. You can open this file by entering fun as name of the file.

• User can APPEND a project to another project or some equations by opening the project after another or entering some equation.

• To CLEAR ALL the equations, press CLEAR ALL.

• ZOOMING is very easy in this program. User can click on '+' or '-' or RESET to zoom in or out or reset zooming respectively.

  If no equation is selected, User can press '+' or '-' key to do zooming.

• By clicking BACK, all the equations given as input are deleted. And user returns to the homepage.

2. Ellastic Collision:

It is a simulation of colliding two bodies on a frictionless surface.

Key Features:

• Some values of Masses and initial velocities are given as default. At any moment clicking RESET, return to this default values.

• Colliding of the objects can be paused or resumed by clicking PAUSE or RESUME respectively.

• User can change the values of Masses and inital velocities.

• Clicking RESTART returns to the initial values that user gave.

• Velocities at any moment can be multiplied or divided by 2 by pressing '+' or '-' respectively.

• Increasing or decreasing of Velocities after first collision may give wrong number of total collisions.

• Number of collisions is counted each time of collisions.

• Number of collisions is very special for the ratio of masses having a power of 100.

• After entering any value, user MUST PRESS ENTER.

For better view,

No. of collisions:	v2	m2	m1
3	any	1	1
31	any	100	1
314	<= 1	10000	1
3141	<= 0.1	1000000	1
31415	<= .01	100000000	1

Special part of this project:

Some Functions were made to do some special work. Here's in brief.

myatoi(char*)

returns decimal value from string as well as negative value.

make_point()

makes an array of point from any 2nd degree arithmetic equation.

co_eff()

extracts the co-efficients of an equation.

pos_from_int()

makes a readable string from integer data got from mouse click.

trace_point()

shows position of mouse click.

zooming is done only by changing the value of "z".

After all, this project is made for a resolution of 1280x720 px.

User can CHANGE screen resolution according to his/her choice.

Conclusion:

Graphing calculator was inspired by desmos.com and Ellastic Collision by a video of 3blue1brown channel on youtube.