C# 学习之函数

static int sumAdd(paras int[] datas)
{
	int sum = 0;	
	foreach(int x in datas)
		sum += x;
	return sum;


}


static void main()
{
	sunAdd(1,2,3,4,5);
}

static void Main(string[] args)
        {
            Console.WriteLine("I love C&&");
            int val = 10;
            Console.WriteLine("val‘s value is:{0}",val);
            changeValue(ref val);
            Console.WriteLine("val‘s value is:{0}",val);
        }


        static int changeValue(ref int val)
        {
            return val *= 2;
        }

void changeValue(int &val)
{
	val *= 2;
}
void main()
{
	int val = 10;
	cout<<"val‘s value is:"<<val<<endl;
	changeValue(val);
	cout<<"val‘s value is:"<<val<<endl;
}

static void outChange(int x, out int y)
{
     y = 2 * x;
}


static void Main(string[] args)
{
    int x = 100;
    int y;
    outChange(x,out y);
    Console.WriteLine("out y‘s value is:{0}",y);
}

namespace ConsoleApplication1
{
    class Program
    {
        public delegate void delFunc(string str);   // 委托的声明


        public static void testDelOne(string str)   //定义委托对应的函数1
        {
            Console.WriteLine("This is delegate one:" + str);
        }


        public static void testDelTwo(string str)   //定义委托对应的函数2
        {
            Console.WriteLine("This is delegate two:" + str);
        }


        public static void testDelThree(string str)  //定义委托对应的函数3 
        {
            Console.WriteLine("This is delegate three:" + str);
        }
        static void Main(string[] args)
        {
            Console.WriteLine("**************Test delegate use like C function pointer***************");
            delFunc fp = testDelOne;
            fp(" in 1.1");
            delFunc xxpp = new delFunc(testDelThree);
            xxpp("in 1.3");


            Console.WriteLine("****************************Test delegate +=**************************");
            fp += testDelTwo;
            fp(" in 2");


            Console.WriteLine("****************************Test delegate + **************************");
            delFunc fpp = testDelThree;
            //delFunc fpAll = fp + fpp;
            delFunc fpAll = fp + testDelThree;
            fpAll(" in 3");


            Console.WriteLine("****************************Test delegate -=*************************");
            fpp -= testDelTwo;
            fpp("in fpp 2");


            fpAll -= testDelTwo;
            fpAll("in fpAll2");


            Console.WriteLine("****************************Test delegate -**************************");
            fpAll = fpAll - testDelOne;
            fpAll(" in last");


        }


    }
}

delegate void del(string str);
void funcName(string str){//....}

C# 学习之函数,布布扣,bubuko.com

C# 学习之函数

原文：http://blog.csdn.net/ddupd/article/details/21642739