const.cs

深入浅出C＃,学习C#比较好的用例,能够很快掌握C#.

using System;
class MyClass
{
	public static void swap(ref int m1,ref int n1)//交换了m和n的值
	{
		int temp=m1;
		m1=n1;
		n1=temp;
	}
	public static int area(int m,int n)
	{
		int a=m*n;
		return a;
	}
	public static void Main()
	{
		int m=1;
		int n=2;
		const int a=3;
		//const static int a=3；错误，不能用static修饰
		//a=4;试图改变常量的值，错误
		const int b=a+1;//常量出现在常量表达式中
		Console.WriteLine("The value of m is:{0}",m);
		Console.WriteLine("The value of n is:{0}",n);
		Console.WriteLine("The value of a is:{0}",a);
		Console.WriteLine("The value of b is:{0}",b);
		Console.WriteLine("change the value of m and n......");
		Console.WriteLine("please input the value of m:");
		string s=Console.ReadLine();
		m=int.Parse(s);
		Console.WriteLine("please input the value of n:");
		string s1=Console.ReadLine();
		n=int.Parse(s1);
		Console.WriteLine("now m={0},n={1}",m,n);
		swap(ref m,ref n);
		Console.WriteLine("swap m and n......");
		Console.WriteLine("now the value of m is:{0}",m);
		Console.WriteLine("now the value of n is:{0}",n);//m和n的值改变
		//swap(ref a,ref b);错误
		int area1=area(a,b);
		Console.WriteLine("a*b={0}",area1);
	}
}