使用指针表达式必须具有类类型错误c ++

Question

>#include "stdafx.h"
>#include <Windows.h>
>#include <iostream>



using namespace std;


HANDLE pHandle;

class Player
{
public:
//Client Player
DWORD_PTR clientPlayer;
char Name[0x10];
unsigned int m_teamId;

//ClientControllableEntity
DWORD_PTR clientSoldier;
BYTE isOccluded;

//ClientSoldierReplication
DWORD_PTR clientReplication;
int state;

//LifeModule
DWORD_PTR healthcomponent;
FLOAT health;
};

class LocalPlayer : public Player
{
public:


DWORD_PTR VehicleVelocityA;
DWORD_PTR VehicleVelocityB;
DWORD_PTR VehicleVelocityC;
INT VehicleSpeed;

};

LocalPlayer lPlayer;

int readSpeed(LocalPlayer* localPlayer){
ReadProcessMemory(pHandle, (void*)(localPlayer->clientSoldier + 0x0280),     &localPlayer->VehicleVelocityA, sizeof(localPlayer->VehicleVelocityA), NULL);
ReadProcessMemory(pHandle, (void*)(localPlayer->clientSoldier + 0x0284), &localPlayer->VehicleVelocityB, sizeof(localPlayer->VehicleVelocityB), NULL);
ReadProcessMemory(pHandle, (void*)(localPlayer->clientSoldier + 0x0288), &localPlayer->VehicleVelocityC, sizeof(localPlayer->VehicleVelocityC), NULL);

double VelocityAX = pow(localPlayer->VehicleVelocityA.x, 2);
double VelocityBX = pow(localPlayer->VehicleVelocityB.x, 2);
double VelocityCX = pow(localPlayer->VehicleVelocityC.x, 2);

localPlayer->VehicleSpeed = 0;
localPlayer->VehicleSpeed = sqrt(VelocityAX + VelocityBX + VelocityCX) * 3.6f;
}

有人可以帮我解决上面的代码吗？我得到表达式必须在这些行上有类错误

double VelocityAX = pow(localPlayer->VehicleVelocityA.x, 2);
double VelocityBX = pow(localPlayer->VehicleVelocityB.x, 2);
double VelocityCX = pow(localPlayer->VehicleVelocityC.x, 2);

它告诉我本地玩家必须有类型。有人可以帮助我调试这段代码，这让我烦恼了好几个小时。

Answer 1

DWORD_PTR是一个指针，而不是一个结构。这就是为什么它会出错。 需要pow或double的{​​{1}}函数。

将float和其他变量声明为VehicleVelocityA或double，或将结构包含float作为x或double。