mirror of
https://github.com/Floriansylvain/GoEvalCalc.git
synced 2026-08-19 11:43:25 +02:00
Initial Commit
This commit is contained in:
Florian Sylvain
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*.exe
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# Math Expression Evaluator
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A simple, interactive math expression evaluator built with Go.
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## Usage
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Run the program and type your expression into the input field. Press Enter to evaluate.
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Examples:
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- `2 + 2`
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- `sin(pi/4)`
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- `pow(2, 8)`
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- `sqrt(64) + 10`
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## Dependencies
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- [expr-lang/expr](https://github.com/expr-lang/expr) - Expression evaluation
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- [gdamore/tcell](https://github.com/gdamore/tcell) - Terminal handling
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- [rivo/tview](https://github.com/rivo/tview) - Terminal UI components
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## Controls
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- Enter: Evaluate expression
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- Esc/Ctrl+C: Exit application
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package main
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import (
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"fmt"
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"math"
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"github.com/expr-lang/expr"
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"github.com/gdamore/tcell/v2"
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"github.com/rivo/tview"
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)
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func main() {
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app := tview.NewApplication()
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env := map[string]any{
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"abs": math.Abs,
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"acos": math.Acos,
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"asin": math.Asin,
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"atan": math.Atan,
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"atan2": math.Atan2,
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"ceil": math.Ceil,
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"cos": math.Cos,
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"cosh": math.Cosh,
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"exp": math.Exp,
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"floor": math.Floor,
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"log": math.Log,
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"log10": math.Log10,
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"max": math.Max,
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"min": math.Min,
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"mod": math.Mod,
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"pow": math.Pow,
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"round": math.Round,
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"sin": math.Sin,
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"sinh": math.Sinh,
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"sqrt": math.Sqrt,
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"tan": math.Tan,
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"tanh": math.Tanh,
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"pi": math.Pi,
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"e": math.E,
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}
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title := tview.NewTextView()
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title.SetText("🧮 [::b]Math Expression Evaluator[-]")
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title.SetTextAlign(tview.AlignCenter)
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title.SetDynamicColors(true)
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title.SetBorder(true)
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title.SetBorderColor(tcell.ColorLightBlue)
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result := tview.NewTextView()
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result.SetDynamicColors(true)
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result.SetWrap(true)
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result.SetChangedFunc(func() { app.Draw() })
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result.SetBorder(true)
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result.SetTitle("Result")
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result.SetTitleAlign(tview.AlignLeft)
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help := tview.NewTextView()
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help.SetText("[yellow]Functions: sqrt, pow, abs, sin, cos, tan...\nConstants: pi, e")
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help.SetDynamicColors(true)
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help.SetWrap(true)
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help.SetBorder(true)
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help.SetTitle("Help")
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help.SetTitleAlign(tview.AlignLeft)
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input := tview.NewInputField()
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input.SetLabel("Expression: ")
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input.SetFieldWidth(60)
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input.SetDoneFunc(func(key tcell.Key) {
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if key == tcell.KeyEnter {
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exprStr := input.GetText()
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program, err := expr.Compile(exprStr, expr.Env(env))
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if err != nil {
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result.SetText(fmt.Sprintf("[red]Compile error: %v", err))
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return
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}
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output, err := expr.Run(program, env)
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if err != nil {
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result.SetText(fmt.Sprintf("[red]Runtime error: %v", err))
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return
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}
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result.SetText(fmt.Sprintf("[green]Result: %v", output))
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}
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})
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input.SetBorder(true)
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input.SetTitle("Input")
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input.SetTitleAlign(tview.AlignLeft)
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mainFlex := tview.NewFlex()
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mainFlex.SetDirection(tview.FlexRow)
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mainFlex.AddItem(title, 3, 1, false)
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mainFlex.AddItem(input, 5, 0, true)
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mainFlex.AddItem(result, 5, 0, false)
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mainFlex.AddItem(help, 3, 1, false)
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app.SetRoot(mainFlex, true)
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app.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
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if event.Key() == tcell.KeyEsc || event.Key() == tcell.KeyCtrlC {
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app.Stop()
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return nil
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}
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return event
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})
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if err := app.Run(); err != nil {
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panic(err)
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}
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}
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module github.com/Floriansylvain/GoEvalCalc
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go 1.24.1
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require (
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github.com/Knetic/govaluate v3.0.0+incompatible // indirect
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github.com/expr-lang/expr v1.17.2 // indirect
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github.com/gdamore/encoding v1.0.0 // indirect
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github.com/gdamore/tcell/v2 v2.7.1 // indirect
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github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
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github.com/mattn/go-runewidth v0.0.15 // indirect
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github.com/rivo/tview v0.0.0-20250330220935-949945f8d922 // indirect
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github.com/rivo/uniseg v0.4.7 // indirect
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golang.org/x/sys v0.17.0 // indirect
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golang.org/x/term v0.17.0 // indirect
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golang.org/x/text v0.14.0 // indirect
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)
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github.com/Knetic/govaluate v3.0.0+incompatible h1:7o6+MAPhYTCF0+fdvoz1xDedhRb4f6s9Tn1Tt7/WTEg=
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github.com/Knetic/govaluate v3.0.0+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
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github.com/expr-lang/expr v1.17.2 h1:o0A99O/Px+/DTjEnQiodAgOIK9PPxL8DtXhBRKC+Iso=
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github.com/expr-lang/expr v1.17.2/go.mod h1:8/vRC7+7HBzESEqt5kKpYXxrxkr31SaO8r40VO/1IT4=
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github.com/gdamore/encoding v1.0.0 h1:+7OoQ1Bc6eTm5niUzBa0Ctsh6JbMW6Ra+YNuAtDBdko=
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github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo5dl+VrEg=
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github.com/gdamore/tcell/v2 v2.7.1 h1:TiCcmpWHiAU7F0rA2I3S2Y4mmLmO9KHxJ7E1QhYzQbc=
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github.com/gdamore/tcell/v2 v2.7.1/go.mod h1:dSXtXTSK0VsW1biw65DZLZ2NKr7j0qP/0J7ONmsraWg=
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github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
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github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
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github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
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github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
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github.com/rivo/tview v0.0.0-20250330220935-949945f8d922 h1:SMyqkaRfpE8ZQUSRTZKO3uN84xov++OGa+e3NCksaQw=
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github.com/rivo/tview v0.0.0-20250330220935-949945f8d922/go.mod h1:02iFIz7K/A9jGCvrizLPvoqr4cEIx7q54RH5Qudkrss=
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github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
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github.com/rivo/uniseg v0.4.3/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
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github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
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github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
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github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
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golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
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golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
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golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
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golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
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golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
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golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
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golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
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|
golang.org/x/term v0.17.0 h1:mkTF7LCd6WGJNL3K1Ad7kwxNfYAW6a8a8QqtMblp/4U=
|
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|
golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
|
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|
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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|
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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|
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
|
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|
golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
|
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|
golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
|
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|
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
|
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|
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
|
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|
golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
|
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|
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
|
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|
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
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Reference in New Issue
Block a user