The task is to design a simple calculator using switch case statements with following operations:
任务是使用带有以下操作的switch case语句设计一个简单的计算器 ：
Addition 加成 Subtraction 减法 Multiplication 乘法 And, division 而且，除法
Program:
程序：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace DecisionMaking3
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Calculator");
Console.WriteLine("----------------------------");
Console.WriteLine("1.Add");
Console.WriteLine("2.Substract");
Console.WriteLine("3.Multiply");
Console.WriteLine("4.Divide");
Console.Write("Enter Choice(1-4):");
int ch = Int32.Parse(Console.ReadLine());
int a, b, c;
switch(ch)
{
case 1:
Console.Write("Enter A:");
a = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter B:");
b = Convert.ToInt32(Console.ReadLine());
c = a + b;
Console.WriteLine("Sum = {0}", c);
break;
case 2:
Console.Write("Enter A:");
a = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter B:");
b = Convert.ToInt32(Console.ReadLine());
c = a - b;
Console.WriteLine("Difference = {0}", c);
break;
case 3:
Console.Write("Enter A:");
a = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter B:");
b = Convert.ToInt32(Console.ReadLine());
c = a * b;
Console.WriteLine("Product = {0}", c);
break;
case 4:
Console.Write("Enter A:");
a = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter B:");
b = Convert.ToInt32(Console.ReadLine());
c = a / b;
Console.WriteLine("Quotient = {0}", c);
break;
default:
Console.WriteLine("Invalid Choice");
break;
}
Console.ReadKey();
}
}
}
Output
输出量
First run:
Calculator
----------------------------
1.Add
2.Substract
3.Multiply
4.Divide
Enter Choice(1-4):1
Enter A:10
Enter B:20
Sum = 30
Second run:
Calculator
----------------------------
1.Add
2.Substract
3.Multiply
4.Divide
Enter Choice(1-4):4
Enter A:10
Enter B:20
Quotient = 0
Third run:
Calculator
----------------------------
1.Add
2.Substract
3.Multiply
4.Divide
Enter Choice(1-4):5
Invalid Choice
翻译自: https://www.includehelp.com/dot-net/design-a-simple-calculator-using-switch-case-statement.aspx
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