C++ ~ 在客户端中调用函数会给出错误："identifier ____ is undefined"

C++ ~ call to function in client gives error: "identifier ____ is undefined"

本文关键字：错误 identifier is 出错 undefined 客户端 调用 函数 C++      更新时间：2023-10-16

我将向您介绍一个涉及多个不同文件的问题。我不知道为什么会出现标题中指定的错误。让我把文件放在下面，然后从那里开始。

DummyClient.cpp

#include "Gameboard.h"          //for Gameboard
#include "Location.h"           //for function prototypes
#include "zList.h"              //for Zombies
#include <iostream>             //for input/output stream
using namespace std;
void main()
{
    srand(123456789);
    Gameboard myGB;
    myGB = Gameboard();
    ZombieListClass();
    ZombieRec zombieList[MAX_ZOMBIES];
    PopulateZombies(zombieList[MAX_ZOMBIES]); // this throws the error here of "Error: identifier "PopulateZombies" is undefined"
}

zList.h

#ifndef ZLIST_H
#define ZLIST_H
#include "Location.h"   // for list record
#include "ZombieRec.h"
#include "Gameboard.h"
class ZombieListClass
{
    public:
      ZombieListClass();            //default constructor 
      void PopulateZombies(ZombieRec zombieList[]);
      bool IsInBounds(int row, int col);

    private:
      ZombieRec list[MAX_ZOMBIES];      //stores the items in the list
      int length;                           //# of values currently in the list
      int currPos;                      //position of current element
      int strength;                 // health and attack units of a zombie
};
#endif

zList.cpp

#include "zList.h"
ZombieListClass::ZombieListClass()      //default constructor 
{
    length = 0;
    currPos = 0;
    strength = 5;
    LocationRec zombieLoc;
}
void ZombieListClass::PopulateZombies(ZombieRec zombieList[])
{
    int row, col;
    for (int i = 0; i < MAX_ZOMBIES; i++)
    {
        row = rand() % MAX_ROW + 1;
        col = rand() % MAX_COL + 1;
        while (!IsInBounds(row, col))
        {
            row = rand() % MAX_ROW + 1;
            col = rand() % MAX_COL + 1;
        }
        zombieList[i].currLoc.row = row;
        zombieList[i].currLoc.col = col;
    }

}
bool ZombieListClass::IsInBounds(int row, int col)
{
    if (row == 0 || row == MAX_ROW + 1 || col == 0 || col == MAX_COL + 1)
    {
        return false;
    }
    else
    {
        return true;
    }
}

Gameboard.h

#ifndef GAMEBOARD_H
#define GAMEBOARD_H

#include "Location.h" 
#include "ZombieRec.h"
#include "zList.h"

const int MAX_ROW = 3;      // total number of rows in the board
const int MAX_COL = 3;      // total number of cols in the board

class Gameboard
{
public:
    Gameboard();

private:
    int boardSizeArr[MAX_ROW + 2][MAX_COL + 2];

}; // end Gameboard
#endif

最后，Gameboard.cpp

#include "Gameboard.h"
Gameboard::Gameboard()
{
    // Declares a board with a boundary along the outside
    boardSizeArr[MAX_ROW + 2][MAX_COL + 2]; 
}

我不想被人用勺子舀，也不想有人帮我解决问题，我正在努力弄清楚我做错了什么，这样我的项目的剩余部分就不会像一直以来那样坎坷。

回顾我的错误，"identifier"Populate Zombies"是未定义的"，我无法想象为什么会这样。这可能与我做事的范围有关吗？如果我遗漏了任何代码（我没有把所有的东西都放进去，但我认为我有所有相关的东西），只要告诉我，我就可以来回交谈。

提前感谢所有试图提供帮助的人：）

-Anthony

通常，您使用变量来调用函数，而不是在类中直接调用它：

ZombieListClass zombieList=new ZombieListClass();  // add a variable here
ZombieRec zombieList[MAX_ZOMBIES];
zombieList.PopulateZombies(zombieList[MAX_ZOMBIES]); // See the difference?

我不确定您发布的错误是否是唯一的错误。这是我在你的主.cpp 中看到的

#include "Gameboard.h"          //for Gameboard
#include "Location.h"           //for function prototypes
#include "zList.h"              //for Zombies
#include <iostream>             //for input/output stream
using namespace std;
void main()
{
    srand(123456789);
    Gameboard myGB;
    myGB = Gameboard();//The constructor"Gameboard()" is automatically called when you defined 
                       //myGB in the previous line,
    ZombieListClass();//see Hai Bi's great answer on this one
    ZombieRec zombieList[MAX_ZOMBIES];//ZombieRec is a member of ZombieListClass, use . to access it
    PopulateZombies(zombieList[MAX_ZOMBIES]); //Also see  Hai Bi's answer
}

我的建议是，在着手解决这样的问题之前，重新审视构造函数和类定义的概念。

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