Golang程序 创建一个可以执行基本计算器操作的类

Golang程序 创建一个可以执行基本计算器操作的类

为了创建一个可以执行基本计算器操作的类,我们可以采取以下步骤

  • 我们可以用两个数字 ab 定义一个 计算器 类 。
  • 定义一个成员方法来计算两个数字的加法。
  • 定义一个成员方法来计算两个数字的乘法运算。
  • 定义一个成员方法来计算两个数字的除法。
  • 定义一个成员方法来计算两个数的减法。
  • main 方法中,声明两个变量, a和b
  • 获取一个 计算器 的实例 。
  • 初始化一个选择变量,在此基础上可以进行数学运算。

例子

package main
import (
   "fmt"
)
type Calculator struct {
   a int
   b int
}
func (c *Calculator)Add(){
   fmt.Println("Addition of two numbers: ", c.a + c.b)
}
func (c *Calculator)Mul(){
   fmt.Println("Multiplication of two numbers: ", c.a * c.b)
}
func (c *Calculator)Div(){
   fmt.Println("Division of two numbers: ", c.a / c.b)
}
func (c *Calculator)Sub(){
   fmt.Println("Subtraction of two numbers: ", c.a - c.b)
}
func main(){
   var a, b int
   fmt.Print("Enter the first number: ")
   fmt.Scanf("%d", &a)
   fmt.Print("Enter the second number: ")
   fmt.Scanf("%d", &b)
   cal := Calculator{
      a: a,
      b: b,
   }
   c:=1
   for c>=1 {
      fmt.Println("Enter 1 for Addition: ")
      fmt.Println("Enter 2 for Multiplication: ")
      fmt.Println("Enter 3 for Division: ")
      fmt.Println("Enter 4 for Subtraction: ")
      fmt.Print("Enter 5 for Exit: ")
      fmt.Scanf("%d", &c)
      switch c {
         case 1:
            cal.Add()
         case 2:
            cal.Mul()
         case 3:
            cal.Div()
         case 4:
            cal.Sub()
         case 5:
            c = 0
            break
         default:
         fmt.Println("Enter valid number.")
      }      
   }
}
Go

输出

Enter the first number: 7
Enter the second number: 3
Enter 1 for Addition:
Enter 2 for Multiplication:
Enter 3 for Division:
Enter 4 for Subtraction:
Enter 5 for Exit: 1
Addition of two numbers: 10
Enter 1 for Addition:
Enter 2 for Multiplication:
Enter 3 for Division:
Enter 4 for Subtraction:
Enter 5 for Exit: 2
Multiplication of two numbers: 21
Enter 1 for Addition:
Enter 2 for Multiplication:
Enter 3 for Division:
Enter 4 for Subtraction:
Enter 5 for Exit: 3
Division of two numbers: 2
Enter 1 for Addition:
Enter 2 for Multiplication:
Enter 3 for Division:
Enter 4 for Subtraction:
Enter 5 for Exit: 4
Subtraction of two numbers: 4
Enter 1 for Addition:
Enter 2 for Multiplication:
Enter 3 for Division:
Enter 4 for Subtraction:
Enter 5 for Exit: 5
Go

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