阅读程序改错

#include <iostream>
#include<string>
using namespace std;
class Box{
public:
      Box(int w,int l):width(w),length(l){}
      int volume(){return heigth*width*length;};
private:
    static int heigth;
    int width;
   int length;
};
int Box::heigth=2;
int main()
{
     Box b(3,4);
     cout<<"volume is  "<<b.volume()<<endl;
    return 0;
}

运行结果：