Question

我收到了“字段不完整类型”的错误，但也不确定原因。有人可以帮忙吗？谢谢！

g++ -pipe -W -Wall -fopenmp -ggdb3 -DDEBUG -fno-omit-frame-pointer  -c -o test.o ../../src/test.cc  
In file included from ../../src/test.cc:50:  
../../src/feature_haar.h:14: error: field ‘_count’ has incomplete type

test.cc

#include "feature_count.h"  
#include "feature_random_counts.h"  
#include "feature_corner.h"  
#include "feature_haar.h" // line 50

feature_haar.h

#ifndef FEATURE_HAAR_H  
#define FEATURE_HAAR_H  

#include "misc.h"  
#include "feature.h"  
#include "vignette.h"  
#include "feature_count.h"  
#include <cassert>  

class FeatureHaar: public Feature    
{  
 public:  

  FeatureCount _count;// line 14  
...  
}  
#endif

feature_count.h

#ifndef FEATURE_COUNT_H  
#define FEATURE_COUNT_H  

#include "misc.h"  
#include "feature.h"  
#include "random_rect.h"  
//#include "feature_integral_img.h"  


class FeatureCount: public Feature {  

  public:  

   RandomRect _rect;  


   char _type[buffer_size];  


   // This method returns an upper-caps string to identify the feature  
   const char *name() ;  

   FeatureCount();  


   FeatureCount( int width, int height, const char *type = "black-count", float WHRatio=-1, int roi_x=0, int roi_y=0, int roi_w=0, int roi_h=0 );  


   ~FeatureCount();  




   // compute features from original data i.e. image  
   void compute(double *integral_image, double *feature);  


   // IO  
   void write_humanreadable(ostream *out);  
   void write(ostream *out);  
   void read(istream *in):  
 };  


#endif

feature.h中

 #ifndef FEATURE_H  
 #define FEATURE_H  

 #include "misc.h"  
 #include "vignette.h"  


 class Feature {// generate the feature from the original data of an example, not responsible for holding the feature.  
 public:  
   int _dim;  


   // We need a virtual destructor since there are virtual methods  
   virtual ~Feature();  

   // This method returns an upper-caps string to identify the feature  
   virtual const char *name() = 0;  


   // write the data into files  
  static void write_matrix_data(double ** features, int *labels, int nb_examples, int dim, const char * filename);  
  static void write_index_data(double ** features,int *labels, int nb_examples, int dim, const char * filename);  
  static void write_compact_data(double ** features, int *labels, int nb_examples, int dim, const char * filename);  



   // compute features from original data i.e. image  
   virtual void compute(Vignette *vignette, double * feature); // this function/class not responsible for allocating/deallocation memory for array feature  
   virtual void compute(double *integral_image, double *feature);  



 // feature preprocessing  

   // scaling each feature s.t. its sample max = 1 and min = 0   
   static void scale_features(double *Data, int dim, double *scales_min, double *scales_max);  
   static void compute_linear_scale(double **Data, int size, int dim, double *scales_min, double *scales_max);  

   // standardize each feature s.t. its sample mean = 0 and sample standard deviation = 1  
   static void standardize_features(double *Data, int dim, double *mean, double *std);  
   static void compute_standardization(double **Data, int size, int dim, double *mean, double *std);  


 };  

 #endif

Answer 1

感谢所有帮助我的人。这是我的坏事。 FeatureCount的定义不对。其成员

void read(istream *in):

应以“;”结尾不是“：”。

如此难以找到如此小的错字？

Answer 2

如果两个类互相使用，则必须有一个指针，因为在收到完整声明之前，不能使用该类。

例如：

<强> b.h

#ifndef _B
#define _B
#include "A.h"
class B
{
    public:
    B();
    A a;
};
#endif

<强> A.H

#ifndef _A
#define _A
class B;
class A
{
    public:
    A();
    B b;
};
#endif

有两个问题：

无法编译A类，因为没有完整声明就使用了B.添加#include“b.h”将不起作用，因为： a.h - 包括“b.h” b.h - 包括“a.h”，自保护后没有声明，因此b级不能创建'A a;'
即使它编译了，A也会创建B，然后B创建A;然后A创造B;然后B创建A直到它崩溃。

这将有效：

<强> B.h

#ifndef _B
#define _B
#include <iostream>
#include "A.h"
class B
{
    public:
    B() {}
    A a;
    void hi() {std::cout << "hi" << std::endl;}
};
#endif

<强> A.H

#ifndef _A
#define _A
class B;
class A
{
    public:
    A();
    void set(B *p);
    void sayHi();
    private:
    B *b;
};
#endif

<强> A.cpp

#include "A.h"
#include "B.h"

A::A() : b(0) {}

void A::set(B *p) {b=p;}

void A::sayHi() { if(b) b->hi(); }

int main()
{
    A a;
    B b;
    a.set(&b);
    a.sayHi();
    return 0;
}

g ++ -g -oworks A.cpp

作品

喜

Answer 3

没有看到所有代码，最可能的问题是Feature_Haar的继承链中的一个类只是一个前向声明。

http://msdn.microsoft.com/en-us/library/200xfxh6.aspx

仍然看不到可能导致此事的任何事情。开始浏览所有包含文件并查找这样的前向声明：

struct SomeStruct; class Someclass;

Answer 4

看起来它可能是RandomRect。

Answer 5

因为它显然有不完整的类型。我们需要看到FeatureCount的定义来说明为什么它是一个不完整的类型。

字段类型不完整

5 个答案: