直方图代码程序 [英] Histogram code program

问题描述

大家好.
我需要编写一个C#程序，该程序从文件中读取数字列表(int)，然后输出直方图和概率列表.我能够读取该列表，但无法计算其余部分.谢谢.

这是我的代码:

Hey everyone.
I need to write a C# program that reads in a list of numbers (ints) from a file and outputs the historgram followed by the list of probabilities.I was able to to read the list but couldn''t calculate the rest. Thank you.

here is my code:

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace HistogramCalculator
{
    class Program
    {
        private static int Compare(KeyValuePair<string, int> kv1, KeyValuePair<string, int> kv2)
        {
            return kv2.Value.CompareTo(kv1.Value);   // descending order
        }

        public static void Main()
        {
            try
            {
                int linecount = 0;
                Dictionary<string, int> histogram = new Dictionary<string, int>();      // creates a dictionary from the text file
                using (StreamReader reader = new StreamReader("C:/Temp/DataImage.txt"))        //reads the text file specified
                {
                    string difline;
                    while ((difline = reader.ReadLine()) != null)       //continues until no lines left
                    {
                        linecount++;    //increases the count

                        if (histogram.ContainsKey(difline))     //counts specific strings
                            ++histogram[difline];
                        else
                            histogram.Add(difline, 1);
                    }
                }

                Console.WriteLine("Line count: " + linecount);

                Console.WriteLine("Max is:" + linecount);
                List<KeyValuePair<string, int>> sortedHistogram = new List<KeyValuePair<string, int>>(histogram);
                sortedHistogram.Sort(Compare);
                foreach (KeyValuePair<string, int> kv in sortedHistogram.Take(20))
                    Console.WriteLine("{0}\t{1}", kv.Value, kv.Key);
            }

            catch (Exception e)
            {

                Console.WriteLine("The file could not be read:"); // Let the user know what went wrong.
                Console.WriteLine(e.Message);
            }

            Console.Write("\nPress any key to continue . . . ");
            Console.ReadKey(true);
        }
    }
}

推荐答案

那么，您尝试了什么-除了真正简单的位以外?"
真的没有别的了，我的大脑僵住了，我想不起来了."

好吧.
因此，您需要将其视为一个问题，并研究如何将其分解为可运行"的位.

1)显示直方图.
1.1)控制台应用程序-因此直方图应该是一个字符序列，反映相对数字.
1.1.1)决策:直方图显示的是实际值还是相对比例? IE. 1个''*''字符代表1，最大值为1000个星号字符，或者最大值为20''*''个字符，并且该值的每1/20个为1''*''个字符?
1.1.2)决策:直方图应该是水平还是垂直?
即

"So what have you tried - other than the really simple bit?"
"nothing else really, my brain froze I can not think any more."

OK.
So, you need to look at it as a problem, and work out how to break it down into "do-able" bits.

1) Display histogram.
1.1) Console application - so histogram should be a sequence of characters, reflecting the relative numbers.
1.1.1) Decision: Is the histogram to show actual values or relative proportions? I.e. 1 ''*'' character for 1, 1000 star characters for 1000, or 20 ''*'' characters for the maximum value, and 1 ''*'' character for each 1/20 of that value?
1.1.2) Decision: Should the histogram be horizontal or vertical?
I.e.

********
***
******
**********

   *
   *
*  *
*  *
* **
* **
* **
****
****
****

交给您！

Over to you!

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