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C# 有些循环使用条件。具体问题_C#_Loops_Conditional Statements_Permutation - Fatal编程技术网

C# 有些循环使用条件。具体问题

C# 有些循环使用条件。具体问题,c#,loops,conditional-statements,permutation,C#,Loops,Conditional Statements,Permutation,我的C代码中有一个关于数学或组合数学的小问题。我不知道怎么写这个 我有一个类节和TestClass,但没有返回预期结果的方法 public class Section { public int Id { get; set; } public int Pages { get; set; } public string Name { get; set; } } [TestFixture] public class PermutatorTest { private I

我的C代码中有一个关于数学或组合数学的小问题。我不知道怎么写这个

我有一个类节和TestClass,但没有返回预期结果的方法

public class Section
{
    public int Id { get; set; }
    public int Pages { get; set; }
    public string Name { get; set; }
}

[TestFixture]
public class PermutatorTest
{
    private IList<Section> _sections;
    private int _targetPage;

    [SetUp]
    public void SetUp()
    {
        _targetPage = 30;
        _sections = new List<Section>
        {
            new Section {Id = 1, Pages = 15, Name = "A"},
            new Section {Id = 2, Pages = 15, Name = "B"},
            new Section {Id = 3, Pages = 10, Name = "C" },
            new Section {Id = 4, Pages = 10, Name = "D"},
            new Section {Id = 5, Pages = 10, Name = "E"},
            new Section {Id = 6, Pages = 5, Name = "F"}
        };
    }

    [Test]
    public void GetPermutationsTest()
    {
        // Code to return list of all combinations
    }
}
e、 g.DDE=10+10+10=30正常 CFFFF=10+5+5+5+5=30正常 等等

我不知道最好的方法来创建循环,并把记录列表
非常感谢您对我的每一次帮助。

仅供参考和搜索。 我知道,这个代码不是很干净 但我把它放在这里作为nUnit测试

它返回我想要的。。。我想

using System;
using System.Collections.Generic;
using NUnit.Framework;

[TestFixture]
public class PermutatorTest
{
    private IList<Section> _sections;
    private int _targetPage;
    private IList<Config> _result;
    [SetUp]
    public void SetUp()
    {
        _targetPage = 30;
        _sections = new List<Section>
        {
            new Section {Id = 1, Pages = 15, Name = "A"},
            new Section {Id = 2, Pages = 15, Name = "B"},
            new Section {Id = 3, Pages = 10, Name = "C" },
            new Section {Id = 4, Pages = 10, Name = "D"},
            new Section {Id = 5, Pages = 10, Name = "E"},
            new Section {Id = 6, Pages = 5, Name = "F"}
        };

        _result = new List<Config>();
    }

    [Test]
    public void GetPermutationsTest()
    {

        for (var b =0 ; b<=_sections.Count-1; b++)
        {
            var config = new Config
            {
                Name = _sections[b].Name,
                Ids =  _sections[b].Id.ToString(),
                Pages = _sections[b].Pages
            };
            GoDeeperAndAddToResult(config, b);
        }

        Console.WriteLine(_result.Count);

        foreach (var item in _result)
        {
            Console.WriteLine($"{item.Name} - {item.Ids} - {item.Pages}");
        }
    }

    private void GoDeeperAndAddToResult(Config config, int startIndex)
    {
        for (var b = startIndex; b <= _sections.Count-1; b++)
        {
            var section = _sections[b];

            var combName = config.Name;
            var combIds = config.Ids;
            var combPages = config.Pages;

            var maxSec = _targetPage / section.Pages;
            for (var a = 1; a <= maxSec; a++)
            {
                combName = combName + section.Name;
                combIds = combIds + section.Id.ToString();
                combPages = combPages + section.Pages;

                var subConfig = new Config
                {
                    Name = combName,
                    Ids = combIds,
                    Pages = combPages
                };

                if (subConfig.Pages == _targetPage)
                {
                    _result.Add(subConfig);
                    break;
                }
                else if (subConfig.Pages < _targetPage)
                {
                    GoDeeperAndAddToResult(subConfig, b + 1);
                }
                else
                {
                    break;
                }
            }
        }
    }

    public class Config
    {
        public string Name { get; set; }
        public string Ids { get; set; }
        public int Pages { get; set; }
    }

    public class Section
    {
        public int Id { get; set; }
        public int Pages { get; set; }
        public string Name { get; set; }
    }
}
使用系统;
使用System.Collections.Generic;
使用NUnit.Framework;
[测试夹具]
公共类置换侵权测试
{
私人IList_部门;
私人int_targetPage;
私有IList_结果;
[设置]
公共作废设置()
{
_targetPage=30;
_节=新列表
{
新节{Id=1,Pages=15,Name=“A”},
新节{Id=2,Pages=15,Name=“B”},
新节{Id=3,Pages=10,Name=“C”},
新节{Id=4,Pages=10,Name=“D”},
新的部分{Id=5,Pages=10,Name=“E”},
新节{Id=6,Pages=5,Name=“F”}
};
_结果=新列表();
}
[测试]
public void GetPermutationsTest()
{

对于(var b=0;b这是我最初的想法,我将为您发布,它只是返回一个字符串列表

public List<String> result;
public void GetResultList(int startOffs, String CurNames, int curTotal)
{
  for (int newOffs = startOffs; newOffs < _sections.Count; newOffs++)
  {
    int newTotal = curTotal + _sections[newOffs].Pages;
    String newNames = CurNames+ _sections[newOffs].Name;
    if (newTotal < _targetPage)
      GetResultList(newOffs, newNames, newTotal);
    else if (newTotal == _targetPage)
      result.Add(newNames);
  }
}
公开列表结果;
public void GetResultList(int startoff、字符串CurNames、int curTotal)
{
对于(int newOffs=startOffs;newOffs<\u sections.Count;newOffs++)
{
int newTotal=curTotal+\u节[newOffs]。页数;
字符串newNames=CurNames+_节[newOffs].Name;
如果(新总数<\u目标页)
GetResultList(newOffs、NewName、newTotal);
else if(newTotal==\u targetPage)
结果.添加(新名称);
}
}
通过初始化结果和启动参数调用:

result = new List<String>();
GetResultList(0,"",0);
result=newlist();
GetResultList(0,“,0);
这是一个修改为使用您的配置类的版本

public void GetResultList(int startOffs, Config CurConfig)
{
  for (int newOffs = startOffs; newOffs < _sections.Count; newOffs++)
  {
    Config newConfig = new Config{ Name = CurConfig.Name + _sections[newOffs].Name,
                                   Ids = CurConfig.Ids + _sections[newOffs].Id.ToString(),
                                   Pages = CurConfig.Pages + _sections[newOffs].Pages};
    if (newConfig.Pages < _targetPage)
      GetResultList(newOffs, newConfig);
    else if (newConfig.Pages == _targetPage)
      _result.Add(newConfig);
  }
}
public void GetResultList(int startOffs,Config CurConfig)
{
对于(int newOffs=startOffs;newOffs<\u sections.Count;newOffs++)
{
Config newConfig=newConfig{Name=CurConfig.Name+\u节[newOffs].Name,
Ids=CurConfig.Ids+\u节[newOffs].Id.ToString(),
Pages=CurConfig.Pages+\u节[newOffs].Pages};
如果(newConfig.Pages<\u targetPage)
GetResultList(newOffs、newConfig);
else if(newConfig.Pages==\u targetPage)
_result.Add(newConfig);
}
}
调用需要初始化结果&启动配置实例

_result = new List<Config>();
Config s = new Config { Ids = "", Pages=0, Name=""};
GetResultList(0,s);
\u结果=新列表();
配置s=new-Config{Ids=”“,Pages=0,Name=”“};
GetResultList(0,s);

递归应该比循环更容易,我想应该有31个结果-为什么DEE(10+10+10)不在您的列表中?事实上..DEE也:)我也尝试通过递归来制作一些东西。
_result = new List<Config>();
Config s = new Config { Ids = "", Pages=0, Name=""};
GetResultList(0,s);