Update 'shp_2_txt.cpp'

shp_2_txt.cpp

@@ -1,3 +1,10 @@
+/*
+http://shapelib.maptools.org/dbf_api.html
+
+basic funtionality taken from dbfdump.c
+path to libshp.dll has to be added as a PATH var
+
+*/
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -17,18 +24,21 @@ int main(int argc, char const *argv[])
     char    szTitle[12];
     string filename = "f:\\testing\\shp_2_txt\\MA.dbf";
 
+    // open textfile and dbf handle
     ofstream txt_file("out.txt");
     dbfh = DBFOpen(filename.c_str(), "rb");
 
+    // check 
     if (dbfh <= 0)
     {
         throw string("File " + filename + " not found");
     }
     else
     {
+        // loop over dbf records 
         for( iRecord = 0; iRecord < DBFGetRecordCount(dbfh); iRecord++ )
         {
-
+            // loop over fields of record
             for( i = 0; i < DBFGetFieldCount(dbfh); i++ )
             {
                 DBFFieldType    eType;
@@ -40,6 +50,7 @@ int main(int argc, char const *argv[])
                 string str(szTitle);
                 string line;
 
+                // parse for lat, lon in degrees and orhto height
                 if (szTitle == dec_lat or szTitle == dec_lon  or szTitle == ortho_h)
                 {
                     txt_file << DBFReadStringAttribute( dbfh, iRecord, i );
@@ -48,7 +59,7 @@ int main(int argc, char const *argv[])
             }
             txt_file << endl;
            }
-
+        // close dbf handle and textfile
         DBFClose( dbfh );
         txt_file.close();
     }