Question

我似乎遇到了界面问题。我有我的所有计算工作的贷款计划，但我似乎无法弄清楚如何调用我的界面。我敢肯定，这可能是我忽视的一些小问题，但由于某种原因，我有一个空白。

Interface:
interface IMyInterface
{
    string iMessage();
}


 public class C1
{
    static void Main(string[] args)
    {
        double interests = 0.0;
        double years = 0.0;
        double loan_amount = 0.0;
        double interest_rate = 0.0;


        Console.Write("Enter Loan Amount:$ ");
        loan_amount = Convert.ToDouble(Console.ReadLine());
        Console.Write("Enter Number of Years: ");
        years = Convert.ToDouble(Console.ReadLine());
        Console.Write("Enter Interest Rate: ");
        interest_rate = Convert.ToDouble(Console.ReadLine());
        interests = loan_amount * interest_rate * years;
        Console.WriteLine("\nThe total interests is {0}", interests);
        Console.ReadLine();




    }

    public string iMessage()
    {
        return Console.WriteLine("Be Ready!");  
    }
}

class Program
{

}

Answer 1

这有帮助吗？ See it working here.

using System;

public class Program
{
    // Here we instantiate or construct a new instance of ThingWithMessage
    // but we refer to it as thing of type IMyInterface,
    // this works because ThingWithMessage implements IMyInterface.
    // Then we use the interface implementation to get a message and
    // write it to the console.
    public static void Main()
    {
        IMyInterface thing = new ThingWithMessage();
        Console.WriteLine(thing.GetMessage());
    }    
}

// This defines a type, or contract that classes can implement
interface IMyInterface
{
    string GetMessage();
}

// This is a class that implements the IMyInterface interface
// effectively, it makes a promise to keep the contract
// specified by IMyInterface.
class ThingWithMessage : IMyInterface
{
    public string GetMessage()
    {
        return "yes, this works.";
    }
}

Answer 2

这可能是你可以使用的东西：

interface IMyInterface
{
    double Calculate();
}

class MyCalculationLogics : IMyInterface
{
    public double Calculate(double loan_amount, double years, double interest_rate)
    {
        return loan_amount * interest_rate * years;
    }
}

public class Program
{
    static void Main(string[] args)
    {
        ....
        // Get the values from the user
        ....

        IMyInterface myCalc = new MyCalculationLogics();
        interests = myCalc.Calculate(loan_amount, years, interest_rate);

        Console.WriteLine("\nThe total interests is {0}", interests);
        Console.ReadLine();
    }
}

接口c＃的贷款程序问题

2 个答案: