Check the ASCII format of STL file

標題：檢查ASCII STL格式範例
VC++ (main.cpp)：

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <regex> //string lib here

using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
    int i = 0, num = 1;
    const char *filePath = "TriangleASCII.STL";
    string lines = "";

    regex solid(" *solid.*");
    regex facetNormal(" *facet normal .+ .+ .+");
    regex outerLoop(" *outer loop");
    regex vertex(" *vertex .+ .+ .+");
    regex endLoop(" *endloop");
    regex endfacet(" *endfacet");
    regex endsolid(" *endsolid");
    //regex number("[+-]?(?=\.[0-9]|[0-9])(?:[0-9]+)?(?:\.?[0-9]*)(?:[eE][+-]?[0-9]+)?");

    ifstream outputFile(filePath);
    if (outputFile.is_open()) //Check File
    {
        num++;
        //solid
        if(outputFile.good())
        {
            getline(outputFile, lines);
            if(regex_match(lines, solid))
            {
                cout << lines << endl;

                while(outputFile.good())
                {
                    //facet normal
                    getline(outputFile, lines);
                    if(regex_match(lines, facetNormal))
                    {
                        cout << lines << endl;
                        num++;
                    } else if(regex_match(lines, endsolid)) { //end solid
                        cout << lines << endl;
                        cout << "Done." << endl;
                        break;
                    } else {
                        cout << "[line " << num << " format error] " << lines << endl;
                        break;
                    }

                    //outer loop
                    getline(outputFile, lines);
                    if(regex_match(lines, outerLoop))
                    {
                        cout << lines << endl;
                        num++;
                    } else {
                        cout << "[line " << num << " format error] " << lines << endl;
                        break;
                    }

                    //vertex
                    getline(outputFile, lines);
                    if(regex_match(lines, vertex))
                    {
                        cout << lines << endl;
                        num++;
                    } else {
                        cout << "[line " << num << " format error] " << lines << endl;
                        break;
                    }
                
                    getline(outputFile, lines);
                    if(regex_match(lines, vertex))
                    {
                        cout << lines << endl;
                        num++;
                    } else {
                        cout << "[line " << num << " format error] " << lines << endl;
                        break;
                    }
                
                    getline(outputFile, lines);
                    if(regex_match(lines, vertex))
                    {
                        cout << lines << endl;
                        num++;
                    } else {
                        cout << "[line " << num << " format error] " << lines << endl;
                        break;
                    }

                    //end loop
                    getline(outputFile, lines);
                    if(regex_match(lines, endLoop))
                    {
                        cout << lines << endl;
                        num++;
                    } else {
                        cout << "[line " << num << " format error] " << lines << endl;
                        break;
                    }

                    //end facet
                    getline(outputFile, lines);
                    if(regex_match(lines, endfacet))
                    {
                        cout << lines << endl;
                        num++;
                    } else {
                        cout << "[line " << num << " format error] " << lines << endl;
                        break;
                    }
                }
            } else {
                cout << "[line " << num << " format error] " << lines << endl;
            }
        }
        outputFile.close();
    }

    return 0;
}

說明：
使用Regular Expression檢查ASCII STL檔案格式。