for练习--凑法

static void Main14购物卡(string[] args)
        {
            //小明单位发了50元的购物卡，他到超市买洗化用品，一是牙刷（5元），二是香皂（2元），三是牙膏（10元）怎么可以正好把五十元花完。

            for (int i = 0; i <= 10; i++)
            {

                for (int x = 0; x <= 25; x++)
                {
                    for (int g = 0; g <= 5; g++)
                    {
                        if (i * 5 + x * 2 + g * 5 == 50)
                        {
                            Console.WriteLine("牙刷\t" + i + "个，香皂\t" + x + "个，牙膏\t" + g + "个");
                        }
                    }
                }
            }
        }

 static void Main15白文白鸡(string[] args)
        {
            //公鸡两文/只，母鸡一文/只，小鸡半文/只，花100文钱，买100只鸡，该如何购买？
            Console.WriteLine("买法有：");
            int n = 0;
            for (int a = 0; a <= 50; a++)
            {
                for (int b = 0; b <= 100; b++)
                {
                    for (int c = 0; c <= 200; c++)
                    {
                        if (a + b + c == 100 && a * 2 + b * 1 + c * 0.5 == 100)
                        {
                            n++;
                            Console.WriteLine("公鸡" + a + "母鸡" + b + "小鸡" + c);
                        }
                    }
                }
            }
            Console.WriteLine("共有{0}种买法", n);
        }

 static void Main16白马百担(string[] args)
        {
            //白马百担：大马驮2担粮食，中马驮1担粮食，两头小马驮1担粮食，要用100匹马，驮100担粮食，该如何调配？
            int n = 0;
            for (int a = 0; a <= 50; a++)
            {
                for (int b = 0; b <= 100; b++)
                {
                    for (int c = 0; c <= 200; c++)
                    {
                        if (a + b + c == 100 && a * 2 + b * 1 + c * 0.5 == 100)
                        {
                            n++;
                            Console.WriteLine("大马{0}\t中马{1}\t小马{2}", a, b, c);
                        }
                    }
                }
            }
            Console.WriteLine("共有{0}种驮法", n);

        }

static void Main17凑钱(string[] args)
        {
            //有1块、2块、5块的钱若干，凑出20块，有几种凑法？

            int n = 0;
            for (int a = 0; a <= 20; a++)
            {
                for (int b = 0; b <= 10; b++)
                {
                    for (int c = 0; c <= 4; c++)
                    {
                        if (a * 1 + b * 2 + c * 5 == 20)
                        {
                            n++;
                            Console.WriteLine("一块的{0}，2块的{1}，五块的{2}", a, b, c);
                        }
                    }
                }
            }
            Console.WriteLine("共有{0}种凑法", n);
        }