还是老问题，我想在同一个头文件下声明不同文件的两个函数然后在主程序中调用，可是老是显示函数未声明！

#include <iostream>
#include <string>
#include "Method.h"
#define MAX 1000
using namespace std;


int main(){


    //创建通讯录结构体变量
    AddressBooks abs;
    //初始化通讯录当中当前人员个数
    abs.m_Size=0;

    int select=0;
    while(true){
               showmenu();
               cin>>select;

        switch(select){
            case 1:
                addPerson(&abs);//利用地址传值，可以修改实参
                break;
            case 2:
                break;
            case 3:
                break;
            case 4:
                break;
            case 5:
                break;
            case 6:
                break;
            case 0:
                cout<<"欢迎下次再使用"<<endl;
                system("pause");

                break;
                return 0;
            }


    }



}

#include <iostream>
#include <string>
#include "Method.h"
#define MAX 1000
using namespace std;

struct Person{
    //姓名
    string m_Name;

    //性别

    int m_Sex;
    //年龄

    int m_Age;
    //电话

    string m_Phone;
    //地址

    string  m_Addr;

};

//设计通讯录结构体

struct  AddressBooks{


//通讯录保存的最大人数
    struct Person personArray[MAX];

//通讯录当前记录联系人的个数
    int m_Size;
};



void addPerson(AddressBooks*abs){


        if(abs->m_Size==MAX){

            cout<<"name"<<endl;

            return ;
        }
        else if(abs->m_Size<MAX){

            //添加具体联系人信息

            //姓名
            string name;

            cout<<"请输入姓名:"<<endl;

            cin>>name;

            abs->personArray[abs->m_Size].m_Name=name;
            //性别
            //年龄
            //电话
            //地址

        }


}