囲碁言語switch条件文の基本的な使い方と例文詳細

switch expression {
  case expression1,expression2, ... :
     Statement block 1
  case expression3, expression4, ... :
     statement name block 2
  default.
     statement block
}

switch {
  case expression1,expression2, ... :
     statement block 1
  case expression3, expression4, ... :
     statement name block 2
  default.
     statement block
}

switch initialization; expression {
  case expression1,expression2, ... :
     Statement block 1
  case expression3, expression4, ... :
     statement name block 2
  default.
     statement block
}

func printWeekday() {
	day := time.Now().Weekday() //need to import time
	fmt.Printf("%s", "Today")
	switch int(day) {
	case 1:
		fmt.Println("Monday")
	case 2:
		fmt.Println("Tuesday")
	case 3:
		fmt.Println("Wednesday")
	case 4:
		fmt.Println("Thursday")
	case 5:
		fmt.Println("Friday")
	case 6, 7:
		fmt.Println("Sunday")
	}

}

func printScores() {
	fmt.Println()
	fmt.Println("Print A,B,C,D" based on scores)
	scores := 0
	fmt.Println("Please enter scores")
	fmt.Scanf("%d", &scores)
	fmt.Printf("score level:")
	switch {
	case scores > 90:
		fmt.Println("A")
	case scores > 80, scores > 70:
		fmt.Println("B")
	case scores > 60:
		fmt.Println("c")
	case scores > = 10:
		fmt.Println("D")
	default:
		fmt.Println("Do you have scores")
	}
}

func printEval() {
	fmt.Println()
	fmt.Println("three, arithmetic")
	var num1, num2 int
	fmt.Println("Please enter the first number: ")
	fmt.Scan(&num1)
	fmt.Println("Please enter the second number: ")
	fmt.Scan(&num2)
	var op string
	fmt.Println("Please enter the symbol [+ - * /] ")
	fmt.Scan(&op)
	fmt.Printf("%d%s%d=%d", num1,op, num2, eval(num1, num2, op))
}
func eval(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("unsupported operator:" + op)
	}
	return result
}