calculate average grade




File list:
UndeterminedClassAverage
.......................\UndeterminedClassAverage
.......................\........................\bin
.......................\........................\...\Debug
.......................\........................\...\.....\UndeterminedClassAverage.exe
.......................\........................\...\.....\UndeterminedClassAverage.pdb
.......................\........................\...\.....\UndeterminedClassAverage.vshost.exe
.......................\........................\obj
.......................\........................\...\x86
.......................\........................\...\...\Debug
.......................\........................\...\...\.....\TempPE
.......................\........................\...\...\.....\DesignTimeResolveAssemblyReferences.cache
.......................\........................\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
.......................\........................\...\...\.....\GenerateResource.read.1.tlog
.......................\........................\...\...\.....\GenerateResource.write.1.tlog
.......................\........................\...\...\.....\UndeterminedClassAverage.csproj.FileListAbsolute.txt
.......................\........................\...\...\.....\UndeterminedClassAverage.exe
.......................\........................\...\...\.....\UndeterminedClassAverage.pdb
.......................\........................\...\...\.....\UndeterminedClassAverage.Properties.Resources.resources
.......................\........................\...\...\.....\UndeterminedClassAverage.UndeterminedClassAverage.resources
.......................\........................\Properties
.......................\........................\..........\AssemblyInfo.cs
.......................\........................\..........\Resources.Designer.cs
.......................\........................\..........\Resources.resx
.......................\........................\..........\Settings.Designer.cs
.......................\........................\..........\Settings.settings
.......................\........................\Program.cs
.......................\........................\UndeterminedClassAverage.cs
.......................\........................\UndeterminedClassAverage.csproj
.......................\........................\UndeterminedClassAverage.Designer.cs
.......................\........................\UndeterminedClassAverage.resx
.......................\UndeterminedClassAverage.sln
.......................\UndeterminedClassAverage.suo