◆函数名必须相同方能构成函数重载;
◆函数返回值类型:可以相同,也可以不同(注意:函数的返回类型不足以区分两个重载函数);
◆函数参数类型:必须不同;
◆函数参数个数:可以相同,可以不同
◆函数参数顺序:可以相同,可以不同;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication
{
class Circle
{
private const float PI = 3.141526F;
//1.没有任何已知条件
public static double Area()
{
Console.WriteLine("空空如也！");
return 0;
}
//2.已知圆心坐标
public static double Area(int x1, int y1)
{
Console.WriteLine("这是一个圆点，坐标为({0},{1})",x1,y1);
return 0;
}
//3.已知半径
public static double Area(double r)
{
double theArea;
theArea = PI * r * r;
return theArea;
}
//4.已知圆心坐标和半径
public static double Area(int x1, int y1, double r)
{
Console.WriteLine("这是一个圆点在({0},{1})半径为{2}的圆", x1, y1, r);
return Area(r);
}
//5.已知圆心和圆周边上的一点
public static double Area(int x1, int y1, int x2, int y2)
{
int x = x2 - x1;
int y = y2 - y2;
double r = (double)Math.Sqrt(x*x+y*y);
Console.WriteLine("这是一个圆心在({0},{1}),圆周边一点在({2},{3})的圆，圆的半径为{4}",x1,y1,x2,y2,r);
return Area(r);
}
static void Main(string[] args)
{
int x1=2,x2=4; //x坐标
int y1=3,y2=5; //y坐标
double radius=3; //半径
double CircleArea = 0;
CircleArea = Area();
Console.WriteLine("-->1.面积为{0}",CircleArea);
Console.WriteLine();
CircleArea = Area(x1,y1);
Console.WriteLine("-->2.面积为{0}", CircleArea);
Console.WriteLine();
CircleArea = Area(radius);
Console.WriteLine("-->3.面积为{0}", CircleArea);
Console.WriteLine();
CircleArea = Area(x1, y1, radius);
Console.WriteLine("-->4.面积为{0}", CircleArea);
Console.WriteLine();
CircleArea = Area(x1, y1, x2, y2);
Console.WriteLine("-->5.面积为{0}", CircleArea);
Console.WriteLine();
Console.ReadKey();
}
}
}