c#编程题，请兄弟进链接查看文本，会的留下代码，输入输出得一致，一定要注意important，感谢

链接: https://pan.baidu.com/s/1CUtqB-2ydwyrEQI9i7R6hA

提取码: cbxg 

 public static void Test()
        {
            List<int> list1 = new List<int>();
            List<int> list2 = new List<int>();
            bool flag_increase=false, flag_decrease=false, flag_equal=false;
            while (true)
            {
                string str=Console.ReadLine();
                if (str=="")
                {
                    break;
                }
                try
                {
                    string[] strs = str.Split(' ');
                    int i, j;
                    i = int.Parse(strs[0]);
                    j = int.Parse(strs[1]);
                    list1.Add(i);
                    list2.Add(j);
                }
                catch (Exception)
                {

                    
                }
                
            }
            for (int i = 0; i < list1.Count - 1; i++)
            {
                if (((float)list1[i] / (float)list2[i]) < ((float)list1[i + 1] / (float)list2[i + 1]))
                {
                    flag_increase = true;
                }
                else if (((float)list1[i] / (float)list2[i]) > ((float)list1[i + 1] / (float)list2[i + 1]))
                {
                    flag_decrease = true;
                }
                else
                {
                    flag_equal = true;
                }
            }
            if (flag_increase && !flag_decrease && !flag_equal)
            {
                Console.WriteLine("increasing");
            }
            else if (!flag_increase && flag_decrease && !flag_equal)
            {
                Console.WriteLine("decreasing");
            }
            else if (!flag_increase && !flag_decrease && flag_equal)
            {
                Console.WriteLine("constant");
            }
            else if (flag_increase && !flag_decrease && flag_equal)
            {
                Console.WriteLine("non-decreasing");
            }
            else if (!flag_increase && flag_decrease && flag_equal)
            {
                Console.WriteLine("non-increasing");
            }
            else
            {
                Console.WriteLine("non-monotonic");
            }
        }

好的，正在编写代码了。

using System;

namespace ConsoleApp1
{  
    
    class frac
    {
        public int up, down;
        frac(string up, string down)
        {
            this.set(up, down);
        }

        public frac()
        {
        }

        public void set(string up, string down)
        {
            this.up = int.Parse(up);
            this.down = int.Parse(down);
            int mmax = Math.Max(this.up, this.down);
            int mmin = Math.Min(this.up, this.down);
            int ggcd = gcd(mmax, mmin);
            this.up /= ggcd;
            this.down /= ggcd;
        }
        public void set(frac another)
        {
            this.up = another.up;
            this.down = another.down;
        }
        int gcd(int a, int b)
        {
            if(b != 0)
            {
                return gcd(b, a%b);
            }
            else
            {
                return a;
            }
        }
        public int compare(frac another)
        {
            if(another.up == this.up && another.down == this.down)
            {
                return 0;
            }
            else
            {
                int result = this.up * another.down - this.down * another.up;
                if(result > 0)
                {
                    return 1;
                }
                else
                {
                    return -1;
                }
            }
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            string line;
            int increFlag = 0, decreFlag = 0, equalFlag = 0;
            int index = 0;
            frac now = new frac();
            frac last = new frac();
            while (true)
            {
                line = Console.ReadLine();
                if (line == null)
                {
                    break;
                }
                String[] eachLine = line.Split(' ');
                if (eachLine.Length != 2)
                {
                    break;
                }
                if(index == 0)
                {
                    last.set(eachLine[0], eachLine[1]);
                }
                else
                {
                    now.set(eachLine[0], eachLine[1]);
                    int flag = now.compare(last);
                    if(flag == 0)
                    {
                        equalFlag = 1;
                    }
                    else if(flag == -1)
                    {
                        decreFlag = 1;
                    }
                    else if(flag == 1)
                    {
                        increFlag = 1;
                    }
                    last.set(now);
                }
                index++;
            }
            //Console.WriteLine(increFlag + ":" + decreFlag + ":" + equalFlag);
            if(increFlag==1 && decreFlag==1)
            {
                Console.WriteLine("non-montonic");
            }
            else if (increFlag == 1 && equalFlag == 1)
            {
                Console.WriteLine("non-decreasing");
            }
            else if (increFlag == 1 && equalFlag == 0)
            {
                Console.WriteLine("increasing");
            }
            else if (decreFlag == 1 && equalFlag == 1)
            {
                Console.WriteLine("non-increasing");
            }
            else if (increFlag == 1 && equalFlag == 0)
            {
                Console.WriteLine("decreasing");
            }
            else if(increFlag==0 && decreFlag==0 && equalFlag==1)
            {
                Console.WriteLine("constant");
            }
            else
            {
                Console.WriteLine("Unexpected.");

            }
        }
    }
}