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Converting math equations to C#[^]

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Hi

I want to solve an equation in asp.net c#

Equation is

then

But

It shows an error like x is undefined....

Please help me in solving this.

With Regards

Thanks in Advance

Manju K

I want to solve an equation in asp.net c#

Equation is

```
int x0 = 5;
int x1 = 2;
```

then

```
y = (x-x0)/(x0-x1)
```

it should return like`y = (x-5)/3;`

But

It shows an error like x is undefined....

Please help me in solving this.

With Regards

Thanks in Advance

Manju K

Comments

please show all code. in your code above there is no int x;

Yes, it will give error as where are you assigining value for x??userinput or hardcoded?

i think he meant x as the user input and y as the return value.

i don't see you have been declare variable x, y

so that the compiler throws that error

to solve that error, you can declare x, y variable inside your function like:

or write an function like:

so that the compiler throws that error

to solve that error, you can declare x, y variable inside your function like:

```
int x = 100; // value 100 is an example
int y = 100; // value 100 is an example
int x0 = 5;
int x1 = 2;
```

....or write an function like:

```
public int MyEquation(int x)
{
int y;
// here is your code
return y;
}
```

v2

Comments

I want to make it as it should return an equation like y = (x-5)/3;

public int MyEquation(int x)

{

return (x - 5) / 3;

}

{

return (x - 5) / 3;

}

You need to tell us what exactly you are trying to acheieve here. With the given information, this can be very easily done through String.Format. But does it help you? I think it will not.

You need to implement a parser of your own which could solve the equations. One needs to be well aware of your requirements to help you out. Search google for "C# Equation Parser". It may give you some ideas to start with.

```
int x0 = 5;
int x1 = 3;
string originalString = "y = (x-{0})/({1})";
string updatedString = string.Format(originalString, x0, (x0 - x1));
```

You need to implement a parser of your own which could solve the equations. One needs to be well aware of your requirements to help you out. Search google for "C# Equation Parser". It may give you some ideas to start with.

v2

Comments

You are not getting my question

I want to make it as it should return like y = (x-5)/3;

I want to make it as it should return like y = (x-5)/3;

Yes, I got it right after posting my first reply. I have updated my answer.

the solution of this type of problem is treating with variables of an equation (not of program asp...etc ) as string and using post-fix notation to solve it with some change that you will determine the variable as it is with out value

e.g

(X-x0)/(x0-x1)---post-fix--> Xx0-x0x1-/

the X means that it's variable of an equation solve it using stack I'll post the solution later.....

v2

Programming languages (usually) don't directly support symbolic algebra manipulation, have a look at Computer Algebra Systems[^] page at Wikipedia to get an idea about what you are trying to do.

v3

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