声明接口
使用interface关键字声明接口。它类似于类声明。默认情况下,接口语句是公共的。以下是接口声明的示例-
public interface ITransactions {
// interface members
void showTransaction();
double getAmount();
}
以下示例演示了上述接口的实现-
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System;
namespace InterfaceApplication {
public interface ITransactions {
// interface members
void showTransaction();
double getAmount();
}
public class Transaction : ITransactions {
private string tCode;
private string date;
private double amount;
public Transaction() {
tCode = " ";
date = " ";
amount = 0.0;
}
public Transaction(string c, string d, double a) {
tCode = c;
date = d;
amount = a;
}
public double getAmount() {
return amount;
}
public void showTransaction() {
Console.WriteLine("Transaction: {0}", tCode);
Console.WriteLine("Date: {0}", date);
Console.WriteLine("Amount: {0}", getAmount());
}
}
class Tester {
static void Main(string[] args) {
Transaction t1 = new Transaction("001", "8/10/2012", 78900.00);
Transaction t2 = new Transaction("002", "9/10/2012", 451900.00);
t1.showTransaction();
t2.showTransaction();
Console.ReadKey();
}
}
}
尝试一下
编译并执行上述代码后,将产生以下结果-
Transaction: 001
Date: 8/10/2012
Amount: 78900
Transaction: 002
Date: 9/10/2012
Amount: 451900