OFtutorial01_inputOutput解析

OFtutorial1.C

源码解析

#include "fvCFD.H"

int main(int argc, char *argv[])
{
    // Initialise OF case
    #include "setRootCase.H"

    // These two create the time system (instance called runTime) and fvMesh (instance called mesh).
    #include "createTime.H"<details>
    #include "createMesh.H"

    // ---
    // Get access to a custom dictionary
    dictionary customDict;
    const word dictName("customProperties");#定义一个word对象dictName，用来存放customProperties文件名称
    // Create and input-output object - this holds the path to the dict and its name
    IOobject dictIO
    (
        dictName, // name of the file
        mesh.time().constant(), // path to where the file is
        mesh, // reference to the mesh needed by the constructor
        IOobject::MUST_READ // indicate that reading this dictionary is compulsory
    );

    // Check the if the dictionary is present and follows the OF format
    if (!dictIO.typeHeaderOk<dictionary>(true))
        FatalErrorIn(args.executable()) << "Cannot open specified refinement dictionary "
            << dictName << exit(FatalError);

    // Initialise the dictionary object
    customDict = IOdictionary(dictIO);

    // ---
    // Read various pieces of information from the main part of the dictionary

    // Lookup which does not need to be told what type of variable we're looking for and
    // uses the standard C++ stringstream syntax
    word someWord;
    customDict.lookup("someWord") >> someWord;

    // This template method needs to know the type of the variable and can provide
    // a default value if the entry is not found in the dictionary
    scalar someScalar( customDict.lookupOrDefault<scalar>("someScalar", 1.0) );#定义一个scalar类对象someScalar, 这个字典对象customDict的lookup函数找到这个对象customDict的关键词"someScalar"的值，然后放入someScalar中去。如果没有，默认为1.

    // A switch is a neat feature allowing boolean values to be read from a dict,
    // it supports the OpenFOAM yes/on/true/1 and no/off/false/0 values automatically.
    bool someBool ( customDict.lookupOrDefault<Switch>("someBool",true) );#定义一个bool类对象someBool，这个对象someBool通过字典对象customDict的lookup函数找到这个对象customDict的关键词" someBool "的值，然后放入someBool中去。

    // Lists of values may also be read in the same way
    List<scalar> someList ( customDict.lookup("someList") );

    // This type of container is particularly interesting - it associates entries with
    // given key values (here of word type but can be anything); useful when
    // associating things by indices in a list is less handy
    HashTable<vector,word> someHashTable ( customDict.lookup("someHashTable") );

    // Summarise what's been read and print in the console
    Info << nl << "Read the following:" << nl << nl
         << "someWord " << someWord << nl << nl
         << "someScalar " << someScalar << nl << nl
         << "someList " << someList << nl << nl
         << "someHashTable " << someHashTable << nl << nl
         << "someBool " << someBool << nl << nl
         << endl;

    // ---
    // Create a custom directory and write an output file

    // Create the output path directory
    fileName outputDir = mesh.time().path()/"postProcessing";
    // Creathe the directory
    mkDir(outputDir);

    // File pointer to direct the output to
	autoPtr<OFstream> outputFilePtr;
    // Open the file in the newly created directory
    outputFilePtr.reset(new OFstream(outputDir/"customOutputFile.dat"));

    // Write stuff
    outputFilePtr() << "# This is a header" << endl;
    outputFilePtr() << "0 1 2 3 4 5" << endl;

    // Append to the imported hash table and wirte it too
    someHashTable.insert("newKey", vector(1., 0., 0.));
    outputFilePtr() << someHashTable << endl;

    Info<< "End\n" << endl;
    return 0;
}

小结

该求解器读取customProperties文件中的内容并将需要的内容输出到customOutputFile.dat中

Make、Allwclean、Allwmake

这三个文件（目录）与上期OFtutorial00_helloWorld解析类似，此处不做赘述

testcase

组成如图所示

与OFtutorial00相同，没有调用system、constant（除customProperties外）中的文件，其内容可以忽略