dandarawy / functionparser Goto Github PK

Hi, just wondering is there a way to add custom/user functions?
Seems it should be able to since the pattern is well defined but according to README it doesn't look so.

Thanks!

Source: https://ru.frwiki.wiki/wiki/Ordre_des_op%C3%A9rations
In mathematics, the order of operations or order of operations determines the order in which calculations are to be performed in a complex expression.

Priority rules:
1) calculations in parentheses or square brackets take precedence over calculations outside. The horizontal fraction or root column acts like a parenthesis;
2) exponentiation takes precedence over multiplication, division, addition, and subtraction;
3) multiplication and division take precedence over addition and subtraction;
4) in brackets, multiply and divide from left to right. The same is true for addition and subtraction.

Math Examples:

1. 3,14*(X/1000/2)^2=0,212(X=520) <--- Incorrect answer = 0,667
2. (X/1000/2)^2*3,14=0,212(X=520) <--- Correct answer = 0,212
3. 3,14*(X/1000/2)^(2-2)=3,14(X=520) <--- Incorrect answer = 1
4. 3,14*(X/1000/2)^(2+2)=0.014 <--- Incorrect answer = 0,444
5. 3,14*(X/1000/2)^(2^2-2)=0,212(X=520) <--- Incorrect answer = 0,667