初识c#

2022-06-15 07:05:35

输入三角形或者长方形边长，计算其周长和面积并输出

//输入三角形或者长方形边长，计算其周长和面积并输出
using System;

namespace tur1_1
{
   class Program
   {
       static double calTriangleArea(double a,double b,double c)
       {
           double p = (a + b + c) / 2;
           double res = Math.Sqrt(p * (p - a) * (p - b) * (p - c));
           return res;
       }

       static double calTrianglePerimeter(double a,double b,double c)
       {
           double res = a + b + c;
           return res;
       }

       static double calRectangleArea(double a,double b)
       {
           double res = a * b;
           return res;
       }

       static double calRectanglePerimeter(double a,double b)
       {
           double res = (a + b) * 2;
           return res;
       }
       static void Main(string[] args)
       {
           bool flag = true;
           do
           {
               Console.WriteLine("input rectangle or triangle side length,2 or 3 params split with ‘ ‘ as :2  3 ");
               string str = Console.ReadLine();
               string[] nums = str.Split(new string[] { " " }, StringSplitOptions.None);
               double[] num = new double[3];
               int i = 0;
               foreach (string n in nums)
               {
                   num[i] = Convert.ToDouble(n);
                   i++;
               }
               switch (i)
               {
                   case 2:
                       double rc = calRectanglePerimeter(num[0], num[1]);
                       Console.WriteLine("Rectangle perimeter is " + rc);
                       double rs = calRectangleArea(num[0], num[1]);
                       Console.WriteLine("Rectangle area is " + rs);
                       break;
                   case 3:
                       double tc = calTrianglePerimeter(num[0], num[1], num[2]);
                       Console.WriteLine("Triangle primeter is " + tc);
                       double ts = calTriangleArea(num[0], num[1], num[2]);
                       Console.WriteLine("Triangle area is " + ts);
                       break;
                   default:
                       Console.WriteLine("input error");
                       break;
               }
               Console.WriteLine("continue(0),exit(1)");
               string ck = Console.ReadLine();
               int k = Convert.ToInt32(ck);
               if(k!=0)
               {
                   flag = false;
               }
           } while (flag);
       }
   }
}
View Code
根据输入的月份判断所在季节

//根据输入的月份判断所在季节
using System;

namespace tur1_2
{
   class Program
   {
       static void Main(string[] args)
       {
           bool flag = true;
           do
           {
               Console.WriteLine("input month number");
               string str = Console.ReadLine();
               int month = Convert.ToInt32(str);
               switch (month)
               {
                   case 3:
                   case 4:
                   case 5:
                       Console.WriteLine("春季");
                       break;
                   case 6:
                   case 7:
                   case 8:
                       Console.WriteLine("夏季");
                       break;
                   case 9:
                   case 10:
                   case 11:
                       Console.WriteLine("秋季");
                       break;
                   case 12:
                   case 1:
                   case 2:
                       Console.WriteLine("冬季");
                       break;

                   default:
                       Console.WriteLine("input error");
                       break;
               }
               Console.WriteLine("continue(0),exit(1)");
               string ck = Console.ReadLine();
               int k = Convert.ToInt32(ck);
               if (k != 0)
               {
                   flag = false;
               }
           } while (flag);
       }
   }
}
View Code
用 while 循环语句实现下列功能：有一篮鸡蛋，不止一个，有人两个两
个数，多余一个，三个三个数，多余一个，再四个四个地数，也多余一个，请问这篮鸡蛋至
少有多少个

/*
用 while 循环语句实现下列功能：有一篮鸡蛋，不止一个，有人两个两
个数，多余一个，三个三个数，多余一个，再四个四个地数，也多余一个，请问这篮鸡蛋至
少有多少个
*/
using System;

namespace tur1_3
{
   class Program
   {
       static void Main(string[] args)
       {
           int i = 2;
           while(i%2!=1||i%3!=1||i%4!=1)
           {
               i++;
           }
           Console.WriteLine(i);
       }
   }
}
View Code
计算数组中奇数之和和偶数之和

//计算数组中奇数之和和偶数之和
using System;

namespace tur1_4
{
   class Program
   {
       static void Main(string[] args)
       {
           bool flag = true;
           do
           {
               Console.WriteLine("input number array length");
               string str = Console.ReadLine();
               int length = Convert.ToInt32(str);
               int[] nums = new int[length];
               long even = 0;
               long odd = 0;
               for(int i=0;i<length;i++)
               {
                   Console.WriteLine("input " + (i+1) + " number:");
                   string s=Console.ReadLine();
                   nums[i] = Convert.ToInt32(s);
                   if(nums[i]%2==0)
                   {
                       even += nums[i];
                   }
                   else if(nums[i]%2==1)
                   {
                       odd += nums[i];
                   }
                   else
                   {
                       Console.WriteLine("error");
                       break;
                   }
               }
               Console.WriteLine("奇数和为 " + odd);
               Console.WriteLine("偶数和为 " + even);

               Console.WriteLine("continue(0),exit(1)");
               string ck = Console.ReadLine();
               int k = Convert.ToInt32(ck);
               if (k != 0)
               {
                   flag = false;
               }
           } while (flag);
       }
   }
}
View Code
找一个二维数组中的鞍点

//找一个二维数组中的鞍点
using System;

namespace tur1_5
{
   class Program
   {
       static void Main(string[] args)
       {
           bool flag = true;
           do
           {
               Console.WriteLine("input number array row length");
               string srow = Console.ReadLine();
               int row = Convert.ToInt32(srow);
               Console.WriteLine("input number array col length");
               string scol = Console.ReadLine();
               int col = Convert.ToInt32(scol);
               if(row<1||col<1)
               {
                   continue;
               }
               int[,] nums = new int[row,col];
               for (int i = 0; i < row; i++)
               {
                   for(int j=0;j<col;j++)
                   {
                       Console.WriteLine("input " + (i + 1) + " row " + (j + 1) + " col number:");
                       string s = Console.ReadLine();
                       nums[i,j] = Convert.ToInt32(s);
                   }
               }
               for (int i = 0; i < row; i++)
               {
                   for (int j = 0; j < col; j++)
                   {
                       Console.Write(nums[i, j] + " ");
                   }
                   Console.Write("\n");
               }

               int[] saddle = new int[row*col];
               int sadlen = 0;
//                int sadmax = row > col ? row : col;
//                bool sadflag = false;
               int sadindex = 0;

               /*
               int rowmaxvalue;
               int[] rowmax = new int[col];
               int colminvalue;
               int[] colmin = new int[row];
               */
               bool[] rowflag = new bool[col];
               bool[] colflag = new bool[row];
               

               for(int i=0;i<row;i++)
               {
                   int maxtemp = int.MinValue;
                   for(int j=0; j<col;j++)
                   {
                       if(maxtemp<nums[i,j])
                       {
                           maxtemp = nums[i, j];
                           rowflag[i] = true;
                       }
                   }
                   if(rowflag[i])
                   {
                       for(int j=0;j<col;j++)
                       {
                           if(nums[i,j]==maxtemp)
                           {
                               bool kflag = true;
                               for(int k=0;k<row;k++)
                               {
                                   if(maxtemp>nums[k,j])
                                   {
                                       kflag = false;
                                       continue;
                                   }
                               }
                               if(kflag)
                               {
                                   sadlen++;
                                   saddle[sadindex] = maxtemp;
                                   sadindex++;
                               }
                           }
                       }
                   }
               }




               /*
               for (int i = 0; i < row; i++)
               {
                   int temp = int.MinValue;
                   rowflag[i] = false;
                   for (int j = 0; j < col; j++)
                   {
                       if(temp<nums[i,j])
                       {
                           temp = nums[i, j];
                           rowmax[i] = j;
                           rowflag[i] = true;
                       }
                   }
               }
               for (int j = 0; j < col; j++)
               {
                   int temp = int.MaxValue;
                   colflag[j] = false;
                   for (int i = 0; i < row; i++)
                   {
                       if (temp > nums[i, j])
                       {
                           temp = nums[i, j];
                           colmin[j] = i;
                           colflag[j] = true;
                       }
                   }
               }
               for(int p=0;p<col;p++)
               {
                   if(rowflag[p])
                   {
                       if(colflag[rowmax[p]])
                       {
                           if(colmin[rowmax[p]] ==p)
                           {
                               saddle[sadindex] = nums[colmin[rowmax[p]], rowmax[p]];
                               sadlen++;
                           }
                       }
                   }
               }
               */




               if(sadlen>0)
               {
                   Console.Write("saddle point(s):");
                   for (int i=0;i<sadlen;i++)
                   {
                       Console.Write(saddle[i] + " ");
                   }
                   Console.Write("\n");
               }
               else
               {
                   Console.WriteLine("no saddle point");
               }
               Console.WriteLine("continue(0),exit(1)");
               string ck = Console.ReadLine();
               int end = Convert.ToInt32(ck);
               if (end != 0)
               {
                   flag = false;
               }
           } while (flag);
       }
   }
}
View Code
 

初识c#

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