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how to solve one variable equations java

Yoni Malka answered on October 6, 2022 Popularity 1/10 Helpfulness 1/10

answer how to solve one variable equations java

how to solve one variable equations java

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Credits: geeksforgeeks.org

import java.io.*;
 
class GFG
{
// Function to solve the given equation
static String solveEquation(String equation)
{
    int n = equation.length(),
        sign = 1, coeff = 0;
    int total = 0, i = 0;
 
    // Traverse the equation
    for (int j = 0; j < n; j++)
    {
        if (equation.charAt(j) == '+' ||
            equation.charAt(j) == '-')
        {
            if (j > i)
                total += sign *
                         Integer.parseInt(
                                 equation.substring(i, j));
            i = j;
        }
 
        // For cases such
        // as: x, -x, +x
        else if (equation.charAt(j) == 'x')
        {
            if ((i == j) ||
                 equation.charAt(j - 1) == '+')
                coeff += sign;
                 
            else if (equation.charAt(j - 1) == '-')
                coeff -= sign;
                 
            else
                coeff += sign *
                         Integer.parseInt(
                                 equation.substring(i, j));
            i = j + 1;
        }
 
        // Flip sign once
        // '=' is seen
        else if (equation.charAt(j) == '=')
        {
            if (j > i)
                total += sign *
                         Integer.parseInt(
                                 equation.substring(i, j));
            sign = -1;
            i = j + 1;
        }
    }
 
    // There may be a
    // number left in the end
    if (i < n)
        total = total +
                sign *
                Integer.parseInt(
                        equation.substring(i));
 
    // For infinite
    // solutions
    if (coeff == 0 &&
        total == 0)
        return "Infinite solutions";
 
    // For no solution
    if (coeff == 0 &&
        total != 0)
        return "No solution";
 
    // x = total sum / coeff
    // of x '-' sign indicates
    // moving numeric value to
    // right hand side
    int ans = -total / coeff;
    return (Integer.toString(ans));
}
 
// Driver code
public static void main(String args[])
{
    String equation = new String("x+5-3+x=6+x-2");
    System.out.print("x = " +
                      solveEquation(equation));
}
}
 
// This code is contributed by
// Manish Shaw(manishshaw1)

Popularity 1/10 Helpfulness 1/10 Language java

Source: www.geeksforgeeks.org

Tags: equations java

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Contributed on Oct 06 2022

Yoni Malka

0 Answers Avg Quality 2/10

how to solve one variable equations java

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