[英]Weird acting loop in C#
注意:我添加了实际的代码段。 滚动到结尾。
// files is created by a OpenFileDialog.
public void Function(String[] files, ...)
{
for(int i; i<files.Length; i++)
{
WriteLine("File " + i + "/" + files.Length + " being processed.");
//... processing for a long time and printing information to console ...
}
//... print results, e.g.: "Results: bla bla"...
}
函数在另一个循环中调用。 我运行了几次代码并认为它运行良好,直到我看到它有一次表现得很奇怪。 我提供了上面的函数,其数组长度为6,预期输出如下:
-------------------------
File 0/6 being processed.
...lots of output...
File 1/6 being processed.
...lots of output...
File 2/6 being processed.
...lots of output...
File 3/6 being processed.
...lots of output...
File 4/6 being processed.
...lots of output...
File 5/6 being processed.
...lots of output...
Results: bla bla...
-------------------------
但是,我得到的输出是这样的:
-------------------------
File 0/1 being processed.
...lots of output...
Results: bla bla...
File 0/3 being processed.
...lots of output...
File 1/3 being processed.
...lots of output...
File 2/3 being processed.
...lots of output...
Results: bla bla...
File 0/3 being processed.
...lots of output...
File 1/3 being processed.
...lots of output...
File 2/3 being processed.
...lots of output...
Results: bla bla...
File 0/6 being processed.
...lots of output...
File 1/6 being processed.
...lots of output...
File 2/6 being processed.
...lots of output...
File 3/6 being processed.
...lots of output...
-------------------------
当我看到那个输出时,我在当前循环结束之前退出执行(它运行了很长时间。)
它看起来像函数正常工作(它运行files.Length次并在此之后输出结果。)但是,传递给函数的参数在某种程度上是错误的(该函数有趣地被称为不止一次。通常,它应该只运行在这种情况下一次。我的意思是,脚本文件中的行数决定了调用函数以上的次数,而脚本文件只包含一行。)该参数(文件数组)来自OpenFileDialog,这意味着我跟它无关。 我只是将数组传递给函数。
我仍然试图理解这种奇怪结果的原因。 这只发生过一次,但我仍然需要诊断问题; 因为,我会让程序运行几天。 它应该正常工作。
你对这个废话有什么看法吗?
上述功能的实际代码:
public String Start(String[] files, StreamWriter reportWriter)
{
List<SortedDictionary<int, SortedDictionary<long, int>>>[] allResults
= new List<SortedDictionary<int,SortedDictionary<long,int>>>[files.Length];
List<SortedDictionary<int, SortedDictionary<long, int>>> results;
Simulation_DenemePositionEstimator p;
Simulation_WimaxStreamReader reader;
String ret;
for (int i = 0; i < files.Length; i++)
{
System.Console.WriteLine("File " + (i+1) + "/" + files.Length + " being processed.");
reader = new Simulation_WimaxStreamReader(grids, new StreamReader(files[i]));
p = new Simulation_DenemePositionEstimator(grids, reader);
// Using parameters in script file which were saved into
// different variables when Simulation instance was created.
results =
p.StartInvestigation(maxRssiDiff, maxCinrDiff, maxAvgTxPwrDiff,
maxUncontinuity, radiusForNeighbors, expansionFactor, increment,
n, numberOfIterations, resetCountForPositioning);
allResults[i] = results;
reader.Close();
}
ret = Statistics(allResults);
System.Console.WriteLine(ret);
reportWriter.WriteLine(ret);
reportWriter.Flush();
return ret;
}
来电功能代码:
// read a line from script file.
while((line = reader.ReadLine()) != null)
{
// line starting with # is comment.
if (line.StartsWith("#") == false)
{
// save parameters retrieved from script file into an array.
values = line.Split(delimiters);
// new Simulation instance with new parameters
sim = new Simulation(map, values);
// Start simulation. scenarioFiles comes from OpenFileDialog.
report = sim.Start(scenarioFiles, reportWriter);
//reportWriter.WriteLine(report);
reportWriter.WriteLine("---------------NEW-PARAMETERS---------------");
reportWriter.Flush();
}
}
脚本文件:
# Horizontal grid count
# Vertical grid count
# maxRssiDiff is the maximum RSSI difference allowed.
# maxCinrDiff is the maximum CINR difference allowed.
# maxAvgTxPwrDiff is the maximum AvgTxPwr difference allowed.
# maxUncontinuity
# radiusForNeighbors
# expansionFactor
# increment
# n -> MT'den gelen kaç değerin ortalaması alınıp yer bulma algoritmasına girdi olarak verilsin?
# Algoritma kaç adımda bir sonuçları dosyaya yazsın?
# Kaç adımdan sonra yer bulma işlemine sıfırdan başlamış gibi devam etsin?
#
# Örnek:
# 118 90 4 3 4 2 1 1 1 3 10 100
118 90 6 4 6 2 1 1 1 3 250 500
# 200 140 4 3 4 2 1 1 1 3 10 100
似乎有些东西比你期望的更频繁地调用方法。
在方法的第一行放置一个断点,看看它被调用的时间和原因。 这个bug几乎必然存在于调用代码中,而不是方法本身,这意味着我们无法提供更多帮助,而不仅仅是建议断点,记录堆栈跟踪等。
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