头歌 .net 综合应用开发答案善用目录持续更新_java

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专题一：C# 基础知识 C#变量第1关简单类型

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Introducing
{
    class b1
    {
       
        static void Main(string[] args)
        {
            /********** Begin *********/
            //定义变量：name和age
            string name="Jackie";
            int age=56;


            //输出
             Console.WriteLine("His name is "+name);
              Console.WriteLine("his age is "+age);
            /********** End *********/
        }
        
    }
}

第2关命名规则

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace B2b
{
    class Program
    {
        static void Main(string[] args)
        {
            /********** Begin *********/
            int fileSystem = 100;
            string myname  = "Jackie";
            string string1 = "words";
            int iLove= 521;

            Console.WriteLine(fileSystem);
            Console.WriteLine(myname);
            Console.WriteLine(string1);
            Console.WriteLine(iLove);
            /********** End *********/

            Console.WriteLine("You have successfully corrected this section of the code");


        }
    }
}

第3关转义字符及Unicode值

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace B3
{
    class b3
    {
        static void Main(string[] args)
        {
            /********** Begin *********/
            //请运用转义字符相关知识
            //按照任务要求将一段文字完整打印出来
Console.Write("Ben:\"Listen to me, son\"\nPeter:\"Yeah, go ahead\"\nBen:\"You are a lot like your father, Peter\"\nBen:\"But your father believed that if you could do good things for other people, you had a moral obligation to do those things\"\nBen:\"Not choice. Responsibility\"\nPeter:\"That is nice. That’s great\"");
            /********** End *********/            
        }
        
    }
}

第4关运算符的优先级

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace B4
{
    class Program
    {
        static void Main(string[] args)
        {
            /********** Begin *********/
            int a = 1;
            int b = 2;
            int c = 3;
            int d = 4;

            int f = (a + b) * c - d;
            /********** End *********/
            Console.WriteLine(f);

        }
    }
}

C#变量拓展第1关类型转换

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace C1
{
    class Program
    {

        static void Main(string[] args)
        {
            //Read a set of data
            string a = Console.ReadLine();
            string b = Console.ReadLine();
            string c = Console.ReadLine();
            int result = 0;
            /********** Begin *********/
            int a1=int.Parse(a);
            int b1=int.Parse(b);
            int c1=int.Parse(c);
                result=a1*b1*c1;
            /********** End *********/
            Console.WriteLine(result);
        }

    }
}

第2关复杂类型之枚举

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace C1
{
    class Program
    {
        /********** Begin *********/
        enum Season :int{Summer=1,Autumn}
        /********** End *********/

        static void Main(string[] args)
        {
            Season mySeason = Season.Summer + 1;
            Console.WriteLine("mySeason is " + mySeason);
        }

    }
}

第3关复杂类型之结构

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace C1
{
    class Program
    {
        /********** Begin *********/
        //define struct type
        struct person{
            public string city;
            public string zipCode;
            public int weight;
        }

        /********** End *********/

        static void Main(string[] args)
        {
            /********** Begin *********/
            //use struct type
            person myFriend;
            myFriend.city="Beijing";
            myFriend.zipCode="343322";
            myFriend.weight=45;

            /********** End *********/

            Console.WriteLine("Your city is " + myFriend.city + ", your zip code is " + myFriend.zipCode + ", your weight is " + myFriend.weight);
        }
    }
}

第4关复杂类型之数组

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace C1
{

    class Program
    {
        static void Main(string[] args)
        {
            /********** Begin *********/
            //Define an array of arrays: a
                int [][] a={new int[]{1,2,3,},new int[]{4,1,6}};

            /********** End *********/

            //Initialize the array
            for (int i = 0; i < 2; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    a[i][j] = i * j;
                }
            }

            /********** Begin *********/
            //Print the second row of column 2 of array a
                Console.WriteLine("数组a第二行第二列的值："+a[1][1]);
            /********** End *********/
        }
    }
}

C#初体验第1关第一个程序：Hello World

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace A1
{
    class Program
    {
        /********** Begin *********/
        // 请补全符合规范的main()函数
      static void Main(string[] args)
        {
            Console.WriteLine("Hello World, C#");
            //请补全代码段
        }
        /********** End *********/
    }
}

第2关简单类型

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace A2
{
    class Program
    {
       
        static void Main(string[] args)
        {
            /********** Begin *********/
            //定义变量：name和age
            string name="Jackie";
            int age=56;

            //输出
    Console.WriteLine("His name is "+name);
    Console.WriteLine("his age is "+age);
            /********** End *********/
        }
        
    }
}

第3关 C#输入输出，模拟一段对话的过程

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace A3
{
    class Program
    {
        static void Main(string[] args)
        {
            /********** Begin *********/
Console.WriteLine("Listen to me, son");
Console.WriteLine("You are a lot like your father, Peter");
Console.WriteLine("But your father believed that if you could do good things for other people, you had a moral obligation to do those things");
Console.WriteLine("Not choice. Responsibility");
            /********** End *********/
        }

    }
}

C#循环语句第1关 while循环

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace F1
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] array = { 1, 2, 6, 9, 4, 7, 13, 12, 5, 3, 8, 10, 11 };

            /********** Begin *********/
 int temp = 0;
        int i = 0;  
        while (i < array.Length-1) {
            int j=0;    //计数器j
            while (j < array.Length - 1 - i) {
                if (array[j] > array[j + 1]) {
                    temp = array[j + 1];
                    array[j + 1] = array[j];
                    array[j] = temp;
                }
                j++;
            }
            i++;
        }
            /********** End *********/

            int size = 0;
            while (size < array.Length)
            {
                Console.WriteLine(array[size]);
                size++;
            }

        }
    }
}

第2关 do循环

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace F2
{
    class Program
    {
        static void Main(string[] args)
        {
            /********** Begin *********/
             int[] array = { 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20 };
        int temp = 0;
        int i = 0;  
        do
        {
            int j = 0; 
            do
            {
                if (array[j] > array[j + 1])
                {
               
                    temp = array[j + 1];
                    array[j + 1] = array[j];
                    array[j] = temp;
                }
                j++;
            } while (j < array.Length - 1 - i) ;
            i++;
        } while (i < array.Length - 1);
        int size = 0;
        while (size < array.Length)
        {
            Console.WriteLine(array[size]);
            size++;
        }
            /********** End *********/
        }
    }
}

第3关 for循环

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace F3
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] array = { 1, 2, 6, 9, 4, 7, 13, 12, 5, 3, 8, 10, 11 };
            int temp = 0;

            /********** Begin *********/
 for(int i=0; i < array.Length - 1; i++)
        {
            for (int j = 0; j < array.Length - 1 - i; j++)
            {
                if (array[j] > array[j + 1])
                {
                
                    temp = array[j + 1];
                    array[j + 1] = array[j];
                    array[j] = temp;
                }
            }
        }
            /********** End *********/

            int size = 0;
            while (size < array.Length)
            {   //输出排序后的数组
                Console.WriteLine(array[size]);
                size++;
            }
        }

    }
}

第4关 foreach循环

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace F3
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] nameList = { "Jackie", "Quentin", "Anna", "Charlize", "Eva", "Audrey", "Aoisola" };

            /********** Begin *********/
Console.WriteLine("Now start naming");
       foreach(string a in nameList){

        Console.WriteLine(a);
      
        }
            /********** End *********/
          Console.WriteLine("Great. Let's start");
    }
    }}

第5关循环中断

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace F4
{
    class Program
    {
        static void Main(string[] args)
        {
            /********** Begin *********/
            for (int i = 1; i <= 9; i++)
    {
        for (int j = 1; j <= i; j++)
        {
            
            if (i * j == 56) {
                Console.WriteLine("we found 56");
                return;
            }
        }
        Console.Write("\n");
    }
            /********** End *********/
        }
    }
}

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