error C4430: 缺少类型说明符 - 假定为 int.注意: C++ 不支持默认 int

// Point3D.h: interface for the CPoint3D class.
//
//////////////////////////////////////////////////////////////////////

//#if !defined(AFX_POINT3D_H__FC945195_032B_4C98_B1AD_A2AA4C9C7F8A__INCLUDED_)
//#define AFX_POINT3D_H__FC945195_032B_4C98_B1AD_A2AA4C9C7F8A__INCLUDED_

//#if _MSC_VER > 1000
//#pragma once
//#endif // _MSC_VER > 1000

#ifndef STRUCTDEFS_H
#define STRUCTDEFS_H
#include

#define Pi 3.1415926f

class CPoint3D
{
public:

float x,y,z;

CPoint3D();
CPoint3D(double,double,double);
CPoint3D(float,float,float);
CPoint3D(int,int,int);
CPoint3D(float *);

float operator & ( CPoint3D& v );
CPoint3D operator * ( CPoint3D& v );
CPoint3D operator * ( double );
CPoint3D operator * ( float );
CPoint3D operator * ( int );
CPoint3D operator - ( CPoint3D& v );
CPoint3D operator + ( CPoint3D& v );
void operator += ( CPoint3D& v );
bool operator == ( CPoint3D& v ) const;
bool operator == ( const CPoint3D& v ) const;

void Unify();
float Length();

virtual ~CPoint3D();

};

//全局函数
//void VectorToAngle(CPoint3D& vec,float& fPdir,float& fAdir);

struct CAngle
{
float m_fP; //Polar angle极角
float m_fA; //azimuthal angle方位角

CPoint3D m_vPos;

CAngle()
{
m_fP=0.0f;
m_fA=0.0f;

AngleToVector();
}

CAngle(float fP,float fA)
{
m_fP=fP;
m_fA=fA;

AngleToVector();
}

~CAngle(){}

CAngle operator +(CAngle& a)
{
return CAngle(m_fP+a.m_fP,m_fA+a.m_fA);
}

CAngle operator *(float a)
{
return CAngle(m_fP*a,m_fA*a);
}

CAngle operator -(CAngle& a)
{
return CAngle(m_fP-a.m_fP,m_fA-a.m_fA);
}

CAngle::operator =(CAngle& a)

{
m_fP=a.m_fP;
m_fA=a.m_fA;
AngleToVector();
}

void CAngle::SetValue(float fP,float fA)
{
m_fP=fP;
m_fA=fA;
AngleToVector();
}

void AngleToVector()
{

m_vPos.y=float(sin(Pi/2-m_fP));
m_vPos.x=float(cos(Pi/2-m_fP)*cos(m_fA));
m_vPos.z=float(-cos(Pi/2-m_fP)*sin(m_fA));
}
};

#endif // !defined(AFX_POINT3D_H__FC945195_032B_4C98_B1AD_A2AA4C9C7F8A__INCLUDED_)

vs 中不支持 main() 这种写法，要写 int main() 或者 void main() ；main的前面必须有类型标识符

这个_myfb_filebuffer不清楚是什么 如果是你要声明的变量的话它的前面缺少了类型的声明， 如果是你要声明的类型的话后面缺少了要声明的变量名称。