AylinCE
Grandmaster Cheater Supreme
 Reputation: 34
Joined: 16 Feb 2017
Posts: 1432
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 Posted: Wed Oct 30, 2024 5:24 pm Post subject: Lua basic Calculator. (V2) |
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It could probably be coded shorter, but even the examples didn't give the desired result.
It was coded only for basic calculation operations.
*Addition (+)
*Subtraction (-)
*Division (/)
*Multiplication (*)
Note: It was designed as a tool that does multiple operations at the same time and in the order you specify, not according to the global mathematical order of operations.
| Code: | function calculate(x,op,y)
if (op == "+") then
return x + y
elseif (op == "-") then
return x - y
elseif (op == "*") then
return x * y
elseif (op == "/") then
return x / y
else
return 0
end
end
function characterFilter(text)
txt2 = (text):gsub("[^0123456789+-/* ]","")
if #txt2~=#text then
return false
end
end
function Calculate_res(line1)
line = (line1):gsub(" ","")
l_filter = characterFilter(line)
if l_filter==false then
showMessage("Use only supported characters!\n0 1 2 3 4 5 6 7 8 9 + - / *")
return
end
local nm, nm1, nm2, nm3 = 0,0,0,0
local nmtbl3 = {}
local optbl3 = {}
for item in line:gmatch("(%d+)") do table.insert(nmtbl3,item) end
for item1 in line:gmatch("(%D)") do table.insert(optbl3,item1) end
for l,k in pairs(optbl3) do
nm = tonumber(nm) + 1
nm1=nmtbl3[nm]
nm2=nmtbl3[nm + 1]
print(l,k)
if l==1 then
nm3 = nm3 + math.abs(calculate(nm1,k,nm2))
else
nm3 = math.abs(calculate(nm3,k,nm2))
a1,a2 = math.modf(nm3)
if a2==0 then nm3 = math.floor(nm3) end
--print(nm3)
end
end
return nm3
end |
use:
| Code: | res1 = Calculate_res("30 / 2 * 4 - 20")
res2 = Calculate_res("410 * 8 + 6")
result res1 = 40
result res2 = 3286 |
--------------------------------------------
--------------------------------------- Version: 2.0
--------------------------------------- Added: Double, Float values..
| Code: | function calculate(x,op,y)
if (op == "+") then
return x + y
elseif (op == "-") then
return x - y
elseif (op == "*") then
return x * y
elseif (op == "/") then
return x / y
else
return 0
end
end
function characterFilter(text)
txt2 = (text):gsub("[^0123456789+-/* .]","")
if #txt2~=#text then
return false
end
end
function Calculate_res(line1)
line = (line1):gsub(" ","")
l_filter = characterFilter(line)
if l_filter==false then
showMessage("Use only supported characters!\n0 1 2 3 4 5 6 7 8 9 + - / * .")
return
end
local nm, nm1, nm2, nm3 = 0,0,0,0
aa2 = ""
aa3 = 0
local nmtbl3 = {}
local optbl3 = {}
for str in line:gmatch("%d+") do
if string.find(line,str.."%.") then aa2=str.."." aa3=1 end
if aa3==0 then table.insert(nmtbl3, tonumber(str) + .0) end
if aa3==1 then
if string.find(line,"%."..str) then
aa2=aa2..str
table.insert(nmtbl3, tonumber(aa2))
aa3=0
end
end
end
for item1 in line:gmatch("(%D)") do
if item1~="." then
table.insert(optbl3,item1)
end
end
for l,k in pairs(optbl3) do
nm = tonumber(nm) + 1
nm1=nmtbl3[nm]
nm2=nmtbl3[nm + 1]
if l==1 then
nm3 = calculate(nm1,k,nm2) --math.abs()
else
nm3 = calculate(nm3,k,nm2) --math.abs()
end
a1,a2 = math.modf(nm3)
if a2==0 then nm3 = math.floor(nm3) end
--print(nm3)
end
return nm3
end |
-- use
| Code: | line = "410.34591 * 8 + 6.422"
res = Calculate_res(line)
print(res) |
res:
3289.18928 -- > Tested with calculator.
---------------------------------------
---------------------------------------
If you want to use this in a form:
1, Form
1, Button
2, Edit box
| Code: | UDF1.CEButton1.OnClick=function(sender)
if UDF1.CEEdit1.Text=="" then
print("No number found for operation!")
else
line = UDF1.CEEdit1.Text
res = Calculate_res(line)
UDF1.CEEdit2.Text = res
end
end
UDF1.CEEdit1.OnChange=function(sender)
res2 = characterFilter(UDF1.CEEdit1.Text)
if res2==false then
UDF1.CEEdit1.Text=""
showMessage("Use only supported characters!\n0 1 2 3 4 5 6 7 8 9 + - / *")
end
end |
---------------------------------------------------------
---------------------------------------------------------
Important note:
The mathematical operation coding given above will determine and return the result in the order you specify, as warned.
This is the same as using "=" after each operation with a calculator and then moving on to the next operation (addition).
However, the original mathematical operations follow this order:
1) What is in parentheses.
2) Exponents.
3) Multiplication and Division, from left to right.
4) Addition and Subtraction, from left to right.
In this respect, the mathematical operations are available in Lua itself and the coding will be short and precise, as in the example:
| Code: | local input = "544.3655 * 8 + 6.455 / 2 "
local success, result = pcall(function()
return load("return " .. input)()
end)
if success then
print("Result: " .. result)
else
print("Error: " .. result)
end |
As always; Until we meet on a different topic, enjoy it.
_________________
Last edited by AylinCE on Fri Nov 01, 2024 10:47 pm; edited 1 time in total |
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