06. Operations Between Numbers

package main
import "fmt"

func main() {
    var num1, num2 int
    fmt.Scanln(&num1)
    fmt.Scanln(&num2)

    var symbol string
    fmt.Scanln(&symbol)

    var number = ""

    if (symbol == "+" || symbol == "-" || symbol == "*") {
        var sum = 0
        if (symbol == "+") {
            sum = num1 + num2
        } else if (symbol == "-") {
            sum = num1 - num2
        } else {
            sum = num1 * num2
        }

        if (sum % 2 == 0) {
            number = "even"
        } else {
            number = "odd"
        }
        fmt.Printf("%d %s %d = %d - %s\n", num1, symbol, num2, sum, number)
    } else {
        if (num2 == 0) {
            fmt.Printf("Cannot divide %d by zero", num1)
        } else {
            if (symbol == "/") {
                fmt.Printf("%d / %d = %.2f\n", num1, num2, float64(num1) / float64(num2))
            } else if (symbol == "%") {
                fmt.Printf("%d %% %d = %d\n", num1, num2, num1 % num2)
            }
        }
    }
}