commit 0714db7e68a050d0bc3fb25bd5599184786bc638 Author: Florian Sylvain Date: Mon Apr 14 00:53:27 2025 +0200 Initial Commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..b883f1f --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +*.exe diff --git a/README.md b/README.md new file mode 100644 index 0000000..dda78d0 --- /dev/null +++ b/README.md @@ -0,0 +1,24 @@ +# Math Expression Evaluator + +A simple, interactive math expression evaluator built with Go. + +## Usage + +Run the program and type your expression into the input field. Press Enter to evaluate. + +Examples: +- `2 + 2` +- `sin(pi/4)` +- `pow(2, 8)` +- `sqrt(64) + 10` + +## Dependencies + +- [expr-lang/expr](https://github.com/expr-lang/expr) - Expression evaluation +- [gdamore/tcell](https://github.com/gdamore/tcell) - Terminal handling +- [rivo/tview](https://github.com/rivo/tview) - Terminal UI components + +## Controls + +- Enter: Evaluate expression +- Esc/Ctrl+C: Exit application diff --git a/cmd/main.go b/cmd/main.go new file mode 100644 index 0000000..447f697 --- /dev/null +++ b/cmd/main.go @@ -0,0 +1,108 @@ +package main + +import ( + "fmt" + "math" + + "github.com/expr-lang/expr" + "github.com/gdamore/tcell/v2" + "github.com/rivo/tview" +) + +func main() { + app := tview.NewApplication() + + env := map[string]any{ + "abs": math.Abs, + "acos": math.Acos, + "asin": math.Asin, + "atan": math.Atan, + "atan2": math.Atan2, + "ceil": math.Ceil, + "cos": math.Cos, + "cosh": math.Cosh, + "exp": math.Exp, + "floor": math.Floor, + "log": math.Log, + "log10": math.Log10, + "max": math.Max, + "min": math.Min, + "mod": math.Mod, + "pow": math.Pow, + "round": math.Round, + "sin": math.Sin, + "sinh": math.Sinh, + "sqrt": math.Sqrt, + "tan": math.Tan, + "tanh": math.Tanh, + "pi": math.Pi, + "e": math.E, + } + + title := tview.NewTextView() + title.SetText("🧮 [::b]Math Expression Evaluator[-]") + title.SetTextAlign(tview.AlignCenter) + title.SetDynamicColors(true) + title.SetBorder(true) + title.SetBorderColor(tcell.ColorLightBlue) + + result := tview.NewTextView() + result.SetDynamicColors(true) + result.SetWrap(true) + result.SetChangedFunc(func() { app.Draw() }) + result.SetBorder(true) + result.SetTitle("Result") + result.SetTitleAlign(tview.AlignLeft) + + help := tview.NewTextView() + help.SetText("[yellow]Functions: sqrt, pow, abs, sin, cos, tan...\nConstants: pi, e") + help.SetDynamicColors(true) + help.SetWrap(true) + help.SetBorder(true) + help.SetTitle("Help") + help.SetTitleAlign(tview.AlignLeft) + + input := tview.NewInputField() + input.SetLabel("Expression: ") + input.SetFieldWidth(60) + input.SetDoneFunc(func(key tcell.Key) { + if key == tcell.KeyEnter { + exprStr := input.GetText() + + program, err := expr.Compile(exprStr, expr.Env(env)) + if err != nil { + result.SetText(fmt.Sprintf("[red]Compile error: %v", err)) + return + } + output, err := expr.Run(program, env) + if err != nil { + result.SetText(fmt.Sprintf("[red]Runtime error: %v", err)) + return + } + result.SetText(fmt.Sprintf("[green]Result: %v", output)) + } + }) + input.SetBorder(true) + input.SetTitle("Input") + input.SetTitleAlign(tview.AlignLeft) + + mainFlex := tview.NewFlex() + mainFlex.SetDirection(tview.FlexRow) + mainFlex.AddItem(title, 3, 1, false) + mainFlex.AddItem(input, 5, 0, true) + mainFlex.AddItem(result, 5, 0, false) + mainFlex.AddItem(help, 3, 1, false) + + app.SetRoot(mainFlex, true) + app.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey { + if event.Key() == tcell.KeyEsc || event.Key() == tcell.KeyCtrlC { + app.Stop() + return nil + } + return event + }) + + if err := app.Run(); err != nil { + panic(err) + } +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..c972000 --- /dev/null +++ b/go.mod @@ -0,0 +1,17 @@ +module github.com/Floriansylvain/GoEvalCalc + +go 1.24.1 + +require ( + github.com/Knetic/govaluate v3.0.0+incompatible // indirect + github.com/expr-lang/expr v1.17.2 // indirect + github.com/gdamore/encoding v1.0.0 // indirect + github.com/gdamore/tcell/v2 v2.7.1 // indirect + github.com/lucasb-eyer/go-colorful v1.2.0 // indirect + github.com/mattn/go-runewidth v0.0.15 // indirect + github.com/rivo/tview v0.0.0-20250330220935-949945f8d922 // indirect + github.com/rivo/uniseg v0.4.7 // indirect + golang.org/x/sys v0.17.0 // indirect + golang.org/x/term v0.17.0 // indirect + golang.org/x/text v0.14.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..d7e351f --- /dev/null +++ b/go.sum @@ -0,0 +1,54 @@ 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