我对编程很陌生，但在过去一周左右一直在关注 c++ 教程并积累了许多 PDF 来帮助我。我在他们或网上找不到任何足够清楚地回答我的问题的东西。请原谅我的新手。
相关代码：
日志文件.hpp
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// HEADER :: CLASS INTERFACE FILE
// ==============================
// Include Guard
#ifndef __LOGFILE_INCLUDED__ // If Actor.hpp hasn't been included yet
#define __LOGFILE_INCLUDED__ // Define this for the compiler so it knows it has now been included
// ==============================
// Forward declared dependencies
// ==============================
// Included dependencies
#include <iostream>
#include <fstream>
// ==============================
// Actual class
class Logfile { // Logfile
public:
// Globally accessible variables
bool LACT; // Is log file active?
std::ofstream LOG; // Actual log file
std::string entry; // Data to be entered in log file
// ==============================
// Core methods
Logfile(); // Constructor
~Logfile(); // Destructor
// Additional methods
bool isActive(); // Is log file active?
void logEntry(std::string entry); // Make an entry in the log if 'LACT' is set to true
void toggleLog(); // Toggle log file open or closed
};
extern Logfile *log; // This variable is declared in main
#endif // __LOGFILE_INCLUDED__
日志文件.cpp
// ==============================
// Included dependencies
#include "Logfile.hpp"
// ==============================
// Core methods
Logfile::Logfile() { // Constructor
LACT = true; // Toggle logfile to active
LOG.open ("LOG.txt"); // Open 'log.txt' and prepare it to receive 'LOG' entries
LOG << "LOG FILE CLASS CONSTRUCTED\n";
LOG << "LOG FILE OPENED\n";
}
Logfile::~Logfile() { // Deconstructor
LOG << "LOG FILE CLOSED\n";
LOG << "LOG FILE CLASS DECONSTRUCTED";
LOG.close(); // Close log file
}
// Additional methods
bool Logfile::isActive() { // Is log file active?
if ( LACT ) return true;
else return false;
}
void Logfile::logEntry(std::string entry) { // Make an entry in the log if 'LACT' is set to true
if ( LACT ) LOG << entry << std::endl;
}
void Logfile::toggleLog() { // Toggle log file open or closed
if ( LACT ) { // Log file is active
LOG << "LOG FILE CLOSED\n";
LOG.close(); // Close log file
} else { // Log file is inactive
LOG.open ("LOG.txt"); // Open 'log.txt' and prepare it to receive 'LOG' entries
LOG << "LOG FILE OPENED\n";
}
}
引擎.hpp
// ==============================
// Forward declared dependencies
class Logfile;
class Engine { // Core system, main loop
public :
// Globally accessible variables
Logfile *log; // Declare 'log' as an empty pointer (*)
引擎.cpp
// ==============================
// Included dependencies
#include "Logfile.hpp"
// ==============================
// Core methods
Engine::Engine() { // Constructor method
// Initialization
log = new Logfile(); // Declare 'log' as pointer to access log file
TCODConsole::initRoot(80,50,"Testbed",false); // Create 'root' console (not fullscreen)
if ( log->isActive() ) log->logEntry("(TCODConsole) Root console initialized"); // WORKS
地图.hpp
// ==============================
// Forward declared dependencies
class Logfile;
extern Logfile *log; // Pointer exists in Engine.hpp
地图.cpp
// ==============================
// Included dependencies
#include "Logfile.hpp"
if ( log->isActive() ) log->logEntry("(TCODConsole) Root console initialized"); TERMINATION STATUS 3
if ( tiles[(x-1)+y*width].tType =="floor" ) tally++; // Left tile status, add 1 to tally if floor : TERMINATION STATUS 3
if ( tiles[(x-1)+(y-1)*width].canWalk ) tally++; // Left-top tile status, add 1 to tally if floor : WORKS
如果我理解正确，终止状态 3 表示我错误地引用了一个关于它是否是指针的变量......？当我想从 Map.cpp 中的 2Darray 中的单个图块访问 tType 字符串时，我最初遇到了这个问题（尽管我可以访问布尔变量 canWalk 就好了......），但不知道出了什么问题，所以我决定学习实现一个外部日志来查找问题......但我想我在这样做时找到了回到同一个问题的方法......
非常感谢任何帮助，就像批评一样，我还有很多东西要学。
--
我问这个问题的最初目的是（现在我意识到）从多文件程序中的任何 *.cpp 文件中获取一个全局声明的对象。我刚刚找到了这个答案：http ://www.cplusplus.com/forum/beginner/3848/ ，以防这可能对其他有类似问题的人有所帮助。