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package main
import ( "fmt" )
func (a, b int, op string) int{ var result int switch op { case "+": result = a + b case "-": result = a - b case "*": result = a * b case "/": result = a / b default: panic("unsupport operator:" + op) } return result }
func grade(score int ) string{ g := "" switch { case score < 0 || score > 100 : panic(fmt.Sprintf("Wrong score: %d",score)) case score < 60: g = "D" case score < 80: g = "C" case score < 90: g = "B" case score < 100: g = "A" } return g
}
func main(){
result := eval(3, 5 ,"+") fmt.Println(result)
fmt.Println(grade(87))
number := 5 switch { case number % 2 == 0 : fmt.Println("hello python") case number % 2 == 1: fmt.Println("hello Go") default: fmt.Println("无效输入") } }
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