记录 Calculator 的 BUG
[BUG]2020-12-18
>> a/b+c/d-c/d
in> a/b+c/d-c/d
out> (a*d+b*c*d-b*d*c)|(b*d*d)
正确的, 应该是 (a*d*d+b*c*d-b*d*c)|(b*d*d)
通过化简, 应该仍是 a/b
>> (1+3a)/3+3/1
in> (1+3a)/3+3/1
out> a=1; b=1; c=3a; d=1
a=+3a; b=3; c=3; d=1
a+9
这里第二步, a=1+3a, 而不是 +3a
>> (a+3a)/3+3/1
in> (a+3a)/3+3/1
out> a=a; b=1; c=3a; d=1
a=a+3a; b=3; c=3; d=1
(a+3a+9)|3
------------------------
>> (2+3a)/3+3/1
in> (2+3a)/3+3/1
out> a=2; b=1; c=3a; d=1
a=2+3a; b=3; c=3; d=1
a+2+9
以上已解决
[BUG]2020-12-21
>> (1+3a)/3*(3/1)
in> (1+3a)/3*(3/1)
out> (3+9a))|3
>> (1+3a/3)*(a/1)
in> (1+3a/3)*(a/1)
out> 3a/1
3/1
3a/1
3/1
(3a+3a)*a/3
((3a+3a)*a)|3
[+(a +b +c) ]*[+d ]
_tmp = (a*d
_tmp = b*d
(a*d+b*d+c)*d/1
(a*d+b*d+c)*d
Bug 的原因在于这里是按 + 来分割的. 没有考虑 ( ) 的作用.
Remark: 以上 Bugs 都已经解决。2020-12-24
不过还有一点小问题：
>> ((3+a)*2-3(a-b)/c)*8
in> ((3+a)*2-3(a-b)/c)*8
out> a*2*8-8(3*a+3*b)/c+48
------------------------
>> :mode=fraction
Switch into fraction calculating mode.
e.g., 1/2+1/3 will return 5/6
>> ((3+a)*2-3(a-b)/c)*8
in> ((3+a)*2-3(a-b)/c)*8
out> 8(2(3+a)*c-3(a-b))|c
------------------------
>> :expand=on
Expand on. In fraction calculation mode,
e.g., (a+b)*(c+d) will return a*c+a*d+b*c+b*d.
>> ((3+a)*2-3(a-b)/c)*8
in> ((3+a)*2-3(a-b)/c)*8
out> 8(2(3+a)*c-3(a-b))|c
==> 8*2*a*c+8*6*c-8*3*a+8*3*b|
------------------------
[BUG] 2020-12-25, 无法识别 solve() 函数
>> solve(x^2==25,x,1,10)
in> solve(x^2~25,x,1,10)
cmd> solv
>> function solv() is not defined.
已解决 12-25
>> (a+3)-(b-4)
in> (a+3)-(b-4)
out> a-b7
应该返回 a-b+7. 已经解决.
在 numerical 模式（:mode=numerical）下
>> (((a+2)+3)-4)/4
in> (((a+2)+3)-4)/4
out> a1/4
分数计算模式下(:mode=fraction), 应该返回 a+1|4
已经解决 on 2020-12-26
>> (1+3a)/3*(3/1)
in> (1+3a)/3*(3/1)
out> 3(1+3*a)|3
==> 3*3*a+3|3
------------------------
>> 3*3*a+3
in> 3*3*a+3
out> (9*a+3)
==> 9*a+3
需要两次化简
>> 3*(a-(b*3-4)+d)/c
in> 3*(a-(b*3-4)+d)/c
out> 3(a-b*3-4+d)|c
==> 3*a-3*b*3+3*d-12|
BUG 2020-12-26
>> ((3+a)*2-3(a-(2b-3)+5)/c)*8
in> ((3+a)*2-3(a-(2b-3)+5)/c)*8
out> 8(c*2(3+a)-(3(a-2b-3+5)))|c
==> 16c*a+48c-24a+48b-48|c
BUG 2020-12-26
正确的应该是 16c*a+48c-24a+48b-192|c
>> 1-(a-3)/a
in> 1-(a-3)/a
out> -(a+3)/a+1
BUG 2020-12-26
正确的应该是 -(a-3)/a+1
已解决.
>> x(x-1)(x-3)
in> x(x-1)(x-3)
>> function x() is not defined.
>> 2(x-1)(x-3)
in> 2(x-1)(x-3)
out> (x-1)*(x-3)
------------------------
>> (x-1)(x-3)*2
in> (x-1)(x-3)*2
out> 2(x-3)
------------------------
>> (x-1)2*(x-3)
in> (x-1)2*(x-3)
out> 2x-6
这个不算是BUG, 这里的输入有误, (x-1)后面如果是数, 需要添加*
------------------------
>> ()2*(x-3)
in> ()2*(x-3)
out> 2x-6
这个也不算是BUG.
------------------------
已解决
>> (x-1)(x+2)
in> (x-1)*(x+2)
out> x*x+2x-x-2
------------------------