XML元素轉(zhuǎn)換成C 結(jié)構(gòu)體數(shù)組

<crosswalk length="1" id ="0">

  <polygon>
      <point x="24" y="23" z="0.0"></point>
      <point x="25" y="23" z="0.0"></point>
      <point x="26" y="23" z="0.0"></point>
      <point x="27" y="23" z="0.0"></point>
      <point x="28" y="23" z="0.0"></point>
  </polygon>

</crosswalk>

struct Pos
{

double x;
double y;
double z;

};

請問上面的xml格式如何轉(zhuǎn)換成下面的結(jié)構(gòu)體數(shù)組?。?/p>