用javascript求解方程 [英] Solving equation with javascript

问题描述

我一直想知道如何使用一个输入字段来解决javascript中的联立方程式，设置像2x + 3y + 8 = 0这样的方程式并在不使用三个输入字段的情况下解决它，但是我仍然能够理解它我需要帮助，我真的不知道这个问题是否被接受，但我需要一个答案请



我尝试了什么：



i已谷歌但没有解决方案

i have being wondering how to solve simultaneous equation in javascript using only one input field, to set the equation like this 2x + 3y + 8 = 0 and solve it without using three input field,but i can,t still figure it out i need help,i don't really know if this question is accepted here but i need an answer please

What I have tried:

i have google it out but no solution yet

推荐答案

首先限制自己解决类似的事情：

（用户输入）Ax + By = C（仅使用'x'和'y'表示要解决的变量）

删除所有空格，以便得到：

Ax + By = C（这使得解析更容易，因为任何MINUS in（Ax - By = C）成为系数的一部分）

使用等效的（C函数）strchr （）搜索'x'然后'y'然后'='来获得A，B和B的值。 C分别（当然你必须将数字的ascii值转换为纯数字 - 你自己的atoi（）或atof（））。



然后你可以使用要解决的决定因素。以下只是提供一步一步细节的一个链接 - 搜索google determinant equation 2X2：

2x2系统的决定因素和Cramer规则1 | Coolmath.com [ ^ ]

First restrict yourself to solving something like:
(user input) Ax + By = C (use only 'x' and 'y' for variables to solve)
Remove all spaces so that you get:
Ax+By=C (this makes parsing easier since any MINUS in (Ax - By = C) becomes part of the coefficient)
Use the equivalent of (C function) strchr() to search for 'x' then 'y' and then '=' to get the values of A, B & C respectively (of course you will have to convert the ascii values of digits to plain numeric - your own atoi() or atof()).

You can then use determinants to solve. The following is just one link that provides step by step details - search google determinant equation 2X2:
"Determinants and Cramer's Rule for 2x2 Systems 1 | Coolmath.com[^]

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