c++ - 类中的 VC++ 函数指针

Question

LASReader.h

class LASReader
{

public:

LASReader();
~LASReader();

Point3 (LASReader::*GetPoint)();

private:

Point3 GetPointF0();
Point3 GetPointF1();
Point3 GetPointF2();
Point3 GetPointF3();
Point3 GetPointF4();
Point3 GetPointF5();
};

LASReader.cpp

switch (m_header.PointDataFormat)
{
case 0:
    m_formatSize = sizeof(LASPOINTF0);
    GetPoint = &LASReader::GetPointF0;
    break;
case 1:
    m_formatSize = sizeof(LASPOINTF1);
    GetPoint = &LASReader::GetPointF1;
    break;
case 2:
    m_formatSize = sizeof(LASPOINTF2);
    GetPoint = &LASReader::GetPointF2;
    break;
case 3:
    m_formatSize = sizeof(LASPOINTF3);
    GetPoint = &LASReader::GetPointF3;
    break;
case 4:
    m_formatSize = sizeof(LASPOINTF4);
    GetPoint = &LASReader::GetPointF4;
    break;
case 5:
    m_formatSize = sizeof(LASPOINTF5);
    GetPoint = &LASReader::GetPointF5;
    break;
default:
    break;  // Unknown Point Data Format
}

主要.cpp

Point3 p = reader->GetPoint;

“错误 C2440:‘初始化’:无法从‘Point3 (__cdecl LASReader::* )(void)’转换为‘Point3’”

当我使用手镯时

Point3 p = reader->GetPoint();

“错误 C2064:项未计算为采用 0 个参数的函数”

我做错了什么？

Answer 1

您需要使用(reader->*reader->GetPoint)() 来调用它。参见 How to invoke pointer to member function when it's a class data member?