eb8f9987a8
add: testing to tictactoe rename: tictactoe add: tictactoe steps refactor: tictactoe const names refactor: tictactoe loop add: tictactoe bad switch example (fallthrough) refactor: tictactoe loop skin remove: tictactoe changable skin refactor: tictactoe all remove: tictactoe unnecessary base dir add: tictactoe slices add: tictactoe slices remove: tictactoe fallthrough rename: tictactoe slices 10 -> 09 update: loops skin tictactoe add: tictactoe randomization add: tictactoe infinite loop and labeled break refactor: tictactoe rand and infinite loop add: tictactoe buggy winning algo add: tictactoe more tests rename: tictactoe wrongPlay to wrongMove add: tictactoe even more tests fix: tictactoe rename: tictactoe waitForInput to wait add: tictactoe os.args gameSpeed remove: tictactoe unnecessary files rename: tictactoe game messages refactor: tictactoe main loop add: types and arrays
49 lines
679 B
Go
49 lines
679 B
Go
package main
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import (
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"fmt"
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"os"
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"strconv"
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)
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func main() {
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// lesson: switch
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if len(os.Args) != 4 {
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fmt.Println("Usage: calc <number1> <operator> <number2>")
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return
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}
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a, err := strconv.ParseFloat(os.Args[1], 64)
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if err != nil {
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fmt.Println("Please provide a valid number")
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return
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}
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b, err := strconv.ParseFloat(os.Args[3], 64)
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if err != nil {
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fmt.Println("Please provide a valid number")
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return
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}
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// multiple declare
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var (
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// declare & assign
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op = os.Args[2]
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res float64
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)
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switch op {
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case "+":
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res = a + b
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case "-":
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res = a - b
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case "*":
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res = a * b
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case "/":
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res = a / b
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}
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fmt.Printf("%v %v %v = %v\n", a, op, b, res)
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}
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