c++ - 类中的VC++函数指针

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
}

main.cpp

Point3 p = reader->GetPoint;

“错误C2440:'正在初始化':无法从'Point3(__cdecl LASReader::*)(void)'转换为'Point3'”

当我用手镯

Point3 p = reader->GetPoint();

“错误C2064:术语未求值为带有0个参数的函数”

我究竟做错了什么？

最佳答案

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?