未定义的引用`静态类成员变量内部静态成员函数' [英] undefined reference to `Static Class Member variable inside Static member function'

问题描述

我实际上试图实现Paging的模拟，在我的内存管理器，我尝试创建一个静态页表，但它给我的参考错误，当我尝试打印它。

  #ifndef MEMORYMANAGER_H 
 #define MEMORYMANAGER_H 
 #includememory.h
 
 class MemoryManager 
 {
 private：
 PhysicalMemory RAM; 
 LogicalMemory VM; 
 int offsetValue; 
 static int ** pageTable; 
 public：
 MemoryManager（）; 
 bool addProcess（TimeSliceRequest）; 
 void printVirtualMemory（）; 
 / * 
 *页表初始化
 ** / 
 static void initializePageTable（）{
 pageTable = new int * [pageSize]; 
 for（int i = 0; i  pageTable [i] = new int [2]; 
} 
} 
 static int getPageTabe（int x，int y）{
 return MemoryManager :: pageTable [x] [y] //未定义引用`MemoryManager :: pageTable'
} 
 static void printPageTable（）{
 for（int i = 0; i  for int j = 0; j <2; j ++）{
 cout< getPageTabe（i，j）; 
} 
 cout<< endl; 
} 
} 
}; 
 
 
 #endif // MEMORYMANAGER_H 
  

很长一段时间，请帮助

$ 成员变量，您还必须定义。这通过基本上在一个实现（源）文件中重复声明来实现：

  int ** MemoryManager :: pageTable; 
  

I am actually trying to implement a simulation of Paging, in my memory manager, i tried create a static page table, but its giving reference error when i try to print it.

#ifndef MEMORYMANAGER_H
#define MEMORYMANAGER_H
#include "memory.h"

class MemoryManager
{
    private:
        PhysicalMemory RAM;
        LogicalMemory VM;
        int offsetValue;
        static int ** pageTable;
    public:
        MemoryManager();
        bool addProcess(TimeSliceRequest);
        void printVirtualMemory();
        /*
         * Page Table Initialization
         **/
        static void initializePageTable(){
            pageTable = new int * [pageSize];
            for (int i=0; i<pageSize; i++) {
                pageTable[i] = new int [2];
            }
        }
        static int getPageTabe(int x, int y) {
            return MemoryManager::pageTable[x][y]; // undefined reference to `MemoryManager::pageTable'
        }
        static void printPageTable(){
            for(int i=0; i<pageSize; i++){
                for(int j=0; j<2; j++) {
                    cout << getPageTabe(i,j);
                }
                cout << endl;
            }
        }
};


#endif // MEMORYMANAGER_H

Getting this Error from a long long time, please help

解决方案

You only declare the pageTable member variable, you have to define it as well. This is done by basically repeating the declaration in an implementation (source) file:

int ** MemoryManager::pageTable;

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