복습 - 간단한 계산기

package main

import "fmt"

func main() {
    var name string
    var a, b float64
    fmt.Scan(&name, &a, &b)

    calc := NewCalculator(name)

    fmt.Println(calc.GetInfo())
    fmt.Printf("History: %d\n", calc.History)

    fmt.Printf("%.0f + %.0f = %.2f\n", a, b, calc.Add(a, b))
    fmt.Printf("%.0f - %.0f = %.2f\n", a, b, calc.Subtract(a, b))
    fmt.Printf("%.0f * %.0f = %.2f\n", a, b, calc.Multiply(a, b))

    result, err := calc.Divide(a, b)
    if err != "" {
        fmt.Println(err)
    } else {
        fmt.Printf("%.0f / %.0f = %.2f\n", a, b, result)
    }

    fmt.Printf("History: %d\n", calc.History)
    fmt.Printf("Last Result: %.2f\n", calc.LastResult)
}