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Fire Emblem-esque Game/Project

Hydrolisk (6)
Hello there.

I have a project I'm working on that resembles the game called "Fire Emblem."

In it, it is possible to place/remove units/soldiers on the game board.

My current problem is with removing units. Presently, the behaviour is like this:
I cannot remove units in places where no units exist.
I can place units.
I can only remove the first unit I place. <- Main problem.

Can anyone help me fix this problem? My logic "feels" correct, but I have no idea what is actually wrong.

Functions of interest:
removeUnit
CUnit.removeSelf

Other information:
Programmed for/tested with Windows
Use ESC to access the menu
Use arrow keys to move the cursor (*)

The following post contains the code.
Hydrolisk (6)
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#include <cstdlib>
#include <conio.h>
#include <iostream>
#include <string>

#define WIDTH 45
#define HEIGHT 15
#define AREA WIDTH * HEIGHT

using namespace std;

struct SMapInfo
{
    int tileType;
    int unitType;
    bool cursor;
};

SMapInfo GMap[WIDTH][HEIGHT];

class CUnit
{
    int coordX, coordY; // coordinMainAtes
    int HP; // HP
    int wType; // weapon type: 1 = sword, 2 = axe, 3 = pike
public:
    bool exists;
    void addAtLoc(int x, int y, int iniHP, int iniWType) // Adds a unit at the location
    {
        coordX = x; // change coordinMainAtes
        coordY = y;
        wType = iniWType; // set weapon
        HP = iniHP; // alive
        GMap[coordX][coordY].unitType = wType; // add self to map
        exists = 1; // now exists
    }
    bool isAtLoc(int x, int y) // Returns true if unit is at a location
    {
        if(x == coordX && y == coordY)
        {
            return 1;
        }
        else
        {
            return 0;
        }
    }
    bool moveToLoc(int x, int y) // Returns true if unit is moved successfully
    {
        if(GMap[x][y].unitType == 0)
        {
            GMap[coordX][coordY].unitType = 0; // remove self from map
            coordX = x; // change coordinMainAtes
            coordY = y;
            GMap[coordX][coordY].unitType = wType; // add self to map
            return 1;
        }
        else
        {
            return 0;
        }
    }
    void removeSelf() // Removes self.
    {
        GMap[coordX][coordY].unitType = 0; // remove self from map
        exists = 0;
    }
};

CUnit GUnitArray[AREA];

int GCursorX = 0;
int GCursorY = 0;

void resetGMap()
{
    for(int y = 0; y < HEIGHT; y++)
    {
        for(int x = 0; x < WIDTH; x++)
        {
            GMap[x][y].tileType = 0;
            GMap[x][y].unitType = 0;
            GMap[x][y].cursor = 0;
        }
    }
}

void drawGMap()
{    
    for(int y = 0; y < HEIGHT; y++)
    {
        int xsum = 0;
        for(int x = 0; x < WIDTH; x++)
        {
            xsum += GMap[x][y].unitType;
            xsum += GMap[x][y].tileType;
            xsum += GMap[x][y].cursor;
        }
        string emptyLine = "";
        if(xsum == 0)
        {
            for(int i = 0; i < WIDTH; i++)
            {
                emptyLine += ".";
            }
            cout << emptyLine;
        }
        else
        {
            for(int x = 0; x < WIDTH; x++)
            {
                int xsum = 0;
                
                if(GMap[x][y].cursor == 1) // draw cursor
                {
                    cout << "*";
                }
                else if(GMap[x][y].unitType != 0) // draw unit
                {
                    switch(GMap[x][y].unitType) // units
                    {
                        case 1: // swordsman
                            cout << "s";
                            break;
                        case 2: // axeman
                            cout << "a";
                            break;
                        case 3: // pikeman
                            cout << "p";
                            break;
                        default:
                            cout << "!";
                            break;
                    }
                }
                else
                {
                    switch(GMap[x][y].tileType) // tiles
                    {
                        case 0: // open
                            cout << ".";
                            break;
                        case 1: // void
                            cout << " ";
                            break;
                        case 2: // high ground
                            cout << ":";
                            break;
                        default:
                            cout << "?";
                            break;
                    }
                }
            }
        }    
        cout << endl;
    }
}
Hydrolisk (6)
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string tileInfo(int T)
{
    string tile;
    switch (T)
    {
        case 0:
            tile = "Ground";
            break;
        case 1:
            tile = "Void";
            break;
        case 2:
            tile = "High Ground";
            break;
    }
    return tile;
}

string unitInfo(int U)
{
    // 1 sword > 2 axe > 3 lance > 1 sword...
    string unit;
    switch (U)
    {
        case 0:
            unit = "None";
            break;
        case 1:
            unit = "Swordsman";
            break;
        case 2:
            unit = "Axeman";
            break;
        case 3:
            unit = "Pikeman";
            break;
    }
    return unit;
}

void clrScrn()
{
    system("CLS");
}

void placeCursor()
{
    GMap[GCursorX][GCursorY].cursor = 1;
}

void removeCursor()
{
    GMap[GCursorX][GCursorY].cursor = 0;
}

bool addUnit(int x, int y, int iniHP, int iniWType)
{
    if(GMap[GCursorX][GCursorY].unitType == 0) // no unit presently occupies space
    {
        GMap[GCursorX][GCursorY].unitType = iniWType;
        for(int i = 0; i < AREA; i++)
        {
            if(GUnitArray[i].exists != 1)
            {
                GUnitArray[i].addAtLoc(x, y, iniHP, iniWType);
            }
        }
        return 1;
    }
    else
    {
        cout << "Failed to add unit." << endl;
        system("PAUSE");
        return 0;
    }
}

bool removeUnit(int x, int y)
{
    for(int i = 0; i < AREA; i++)
    {
        if(GUnitArray[i].exists == 1)
        {
            if(GUnitArray[i].isAtLoc(x, y) == 1)
            {
                GUnitArray[i].removeSelf();
                cout << "Removed unit." << endl;
                system("PAUSE");
                return 1;
            }
            else
            {
                cout << "Failed to remove unit." << endl;
                system("PAUSE");
                return 0;
            }
        }
    }
}
Hydrolisk (6)
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int main()
{
    resetGMap();
    int inMainA, inMainB;
    bool gameOn = 1;
    while(gameOn)
    {
        clrScrn();
        placeCursor();
        drawGMap();
        cout << "Tile: " << tileInfo(GMap[GCursorX][GCursorY].tileType) << endl;
        cout << "Unit: " << unitInfo(GMap[GCursorX][GCursorY].unitType) << endl;
        cout << ">> ";
        inMainA = getch();
        cout << inMainA << endl; // return input
        switch(inMainA)
        {
            case 224: // special key
                inMainB = getch();
                switch(inMainB)
                {
                    case 72: // up
                        if (GCursorY > 0)
                        {
                            removeCursor();
                            GCursorY--;
                        }
                        break;
                    case 80: // down
                        if (GCursorY < HEIGHT - 1)
                        {
                            removeCursor();
                            GCursorY++;
                        }
                        break;
                    case 75: // left
                        if (GCursorX > 0)
                        {
                            removeCursor();
                            GCursorX--;
                        }
                        break;
                    case 77: // right
                        if (GCursorX < WIDTH - 1)
                        {
                            removeCursor();
                            GCursorX++;
                        }
                        break;
                }
                break;
            case 27: // ESC menu
                int inMenu;
                bool menuOn;
                menuOn = 1;
                while(menuOn)
                {
                    cout << "\n   MENU" << endl;
                    cout << "ESC - Return" << endl;
                    cout << "1 - Place Tile" << endl;
                    cout << "2 - Place Unit" << endl;
                    cout << "3 - Remove Unit" << endl;
                    cout << "0 - Exit" << endl;
                    inMenu = getch();
                    switch(inMenu)
                    {
                        case 27: // ESC return
                            menuOn = 0;
                            break;
                        case 49: // 1 Tile Input
                            int inTile;
                            bool tileOn;
                            tileOn = 1;
                            while(tileOn)
                            {
                                cout << "\n    TILE" << endl;
                                cout << "ESC - Return" << endl;
                                cout << "1 - Ground" << endl;
                                cout << "2 - Void" << endl;
                                cout << "3 - High Ground" << endl;
                                inTile = getch();
                                switch(inTile)
                                {
                                    case 49: // 1 ground
                                        tileOn = 0;
                                        menuOn = 0;
                                        GMap[GCursorX][GCursorY].tileType = 0;
                                        break;
                                    case 50: // 2 void
                                        tileOn = 0;
                                        menuOn = 0;
                                        GMap[GCursorX][GCursorY].tileType = 1;
                                        break;
                                    case 51: // 3 high ground
                                        tileOn = 0;
                                        menuOn = 0;
                                        GMap[GCursorX][GCursorY].tileType = 2;
                                        break;
                                    case 27: // ESC return
                                        tileOn = 0;
                                        break;
                                    default:
                                        break;
                                }
                            }
                            break;
                        case 50: // 2 Unit Input
                            int inUnit;
                            bool unitOn;
                            unitOn = 1;
                            while(unitOn)
                            {
                                cout << "\n    UNIT" << endl;
                                cout << "ESC - Return" << endl;
                                cout << "1 - Swordsman" << endl;
                                cout << "2 - Axeman" << endl;
                                cout << "3 - Pikeman" << endl;
                                inUnit = getch();
                                switch(inUnit)
                                {
                                    case 49: // 1 swordsman
                                        unitOn = 0;
                                        menuOn = 0;
                                        addUnit(GCursorX, GCursorY, 3, 1);
                                        break;
                                    case 50: // 2 swordsman
                                        unitOn = 0;
                                        menuOn = 0;
                                        addUnit(GCursorX, GCursorY, 3, 2);
                                        break;
                                    case 51: // 3 swordsman
                                        unitOn = 0;
                                        menuOn = 0;
                                        addUnit(GCursorX, GCursorY, 3, 3);
                                        break;
                                    case 27: // ESC return
                                        unitOn = 0;
                                        break;
                                    default:
                                        break;
                                }
                            }
                            break;
                        case 51: // 3 remove unit
                            menuOn = 0;
                            removeUnit(GCursorX, GCursorY);
                            break;
                        case 48: // 0 exit
                            gameOn = 0;
                            menuOn = 0;
                            break;
                        default:
                            break;
                    }
                }
            default:
                break;
        }
    }
    return 0;
}
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