Program Dream•2mo ago

Mathematic Equation solving app/website

Guys I am working on a simple project and it's about a website that can solve many kinds of mathematical problems. Generally the user will be able to choose 1 or 2 variables and then they need to make an equation or expression using symbols (+,-,/,*,mod etc) and the program will return the solution pair for the given equation/expression by testing out some numbers within a range. The user will also be able to modify the number range. If anyone is interested about this project then let me know

18 Replies

anic17•2mo ago

Adding modular arithmetic it is going to be quite harder than just basic arithmetic operations

MushfiqurOP•2mo ago

Not really. Solving an equation is much harder I was able to code the core part but there's many things left

anic17•2mo ago

The equation is limited to linear equations?

MushfiqurOP•2mo ago

Nope

anic17•2mo ago

I'm guessing you're using Newton's method for it

MushfiqurOP•2mo ago

No I am just using brute force method usually the computer will test the numbers from 1 to 10000 to check whether the number satiesfies the equation. Then when the solution is found the program wil return the values which will pass the test and show it in the html page

anic17•2mo ago

Bro That's probably the least efficient mrghkd existing And what if a solution is -3 or ⅔

MushfiqurOP•2mo ago

it will only work with integer solutions at the first stage. after that I will try to work with non-integer numbers also

anic17•2mo ago

And that is the problem Trying out every number from 0 to 10000 is very, very, very slow I'd strongly suggest you to use Newton's method or the bisection one to help you find the roots easily I have done an equation solver before and those were by far the best methods

MushfiqurOP•2mo ago

Yep I faced the problem I reduced the default limit. Thanks for the suggestion though

anic17•2mo ago

That's not what I'm saying you should attempt And you'll probably discover (if you haven't already) the precision errors of 64-bit doubles

MushfiqurOP•2mo ago

Yep I am getting some kind of error even though I don't know what is it Can you tell me about it?

anic17•2mo ago

It's a bit complicated to explain in simple terms but basically doubles lose precision due to their internal representation

MushfiqurOP•2mo ago

 
   results = {}; // Reset results
    let epsilon = 1e-6; // Define a tolerance value for floating-point comparison
    if (expressionArray.includes('x') && expressionArray.includes('y')) {
    // Loop through array to find pairs of (x, y)
    for (let i = 0; i < array.length; i++) {
        results[`temp${i}`] = []; // Create a new array to store results for each 'i'

        for (let j = 0; j < array.length; j++) { 
            let x = array[i];
            let y = array[j];

            let expression = expressionArray.join('')
            .replace(/x/g, x)
            .replace(/y/g, y);

            let result = eval(expression);

 
   results = {}; // Reset results
    let epsilon = 1e-6; // Define a tolerance value for floating-point comparison
    if (expressionArray.includes('x') && expressionArray.includes('y')) {
    // Loop through array to find pairs of (x, y)
    for (let i = 0; i < array.length; i++) {
        results[`temp${i}`] = []; // Create a new array to store results for each 'i'

        for (let j = 0; j < array.length; j++) { 
            let x = array[i];
            let y = array[j];

            let expression = expressionArray.join('')
            .replace(/x/g, x)
            .replace(/y/g, y);

            let result = eval(expression);

this is the core logic of this program does this include the fault you are taking about?

anic17•2mo ago

yeah

MushfiqurOP•2mo ago

I solved the problem 👍 its just working fine now. except it can seek values which are only integer and numbers from 1 to 500

anic17•2mo ago

Have you looked up any numerical method for solving equations

MushfiqurOP•2mo ago

nope just the brute force.

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Mathematic Equation solving app/website