need to solve an exercise

[jane2]

Hello guys. i really need some help on this !! create a class which contains 2 private members expressing the coefficients of a first grade equation with 1 variable, a function that returns the number of equation's roots (consider n/0 and 0/0),and a function that returns the equation's root if it does exist.

[ResidentBiscuit]

What are you stuck on?

[jane2]

on creating this root's function, i can't find what kind of instruction to use and how to do that

[Thumper]

Could you describe in a bit more detail what you're supposed to be doing?
I'm not quite understanding.

[jane2]

i'm sorry if you were teased by my posts , i didn't do it on purpose and i know u're not paid by answering my questions...anyway, this is a kind of test's exercise which consists on creating a class with the requirements above

[Thumper]

It's not about that. Double posting something makes everyone here want to help you less. It's about manners. Double posting is impolite.

It's the requirements that I don't understand. Elaborate some more on them and I'll see if I can help you.

[jane2]

i'm supposing to create a class and some functions about that. the class should be named for example : class Equation{ ...its private members should be the equations coefficients (ex: 2x=8). now the function should return the equation's roots..i hope you understood

[jane2]

thnx for the advice btw i won't double post anymore

[Thumper]

Okay, that shouldn't be too difficult, because by definition a first degree function has one and only one root.
So lets write some pseudocode for your problem.

For this program, let's define a function as the form y = ax + b.

In maths, when you're looking for a root you want to find the value of x when y is 0. So set y to zero, and solve for x.

0 = ax + b
-b = ax  <-- subtract b from both sides
x = -b/a <-- divide both sides by a

So now we have derived a formula to solve for the root of the linear equation.
Now you can have a function called roots, or something. Get the user to input the value of a and b, and return the value of -b/a, which we now know to be the root of the first degree function.

So, I've given you a really good starting point. Start writing some code and if you end up needing more help I'll be around :)