Was not declared in this scope issue - c++

Question

I'm checking to see and understand someone else's code... The code worked in his computer, however when I tried to edit it in mine, it doesn't seem to work. The lib files are all connected properly thou...
#include "play.h"
#include "Lib110ct/Lib110ct.h"
#include <ctime>
int main(int argc, char** argv)
{
Win110ct win;
Turtle * t = win.getTurtle();
win.hideTurtle();
const int NumOfBook = 7;
Player You(512,384);
Book B[NumOfBook];
int pts = 0;
char in;
time_t ti;
while (in != 'x')
{
for (int i = 0; i<NumOfBook; i++)
{
if (A[i].isReadBy(You))
{
B[i].setPosition(rand() % 1024 + 1,rand() % 768 + 1);
pts++;
}
B[i].move();
B[i].draw(t);
}
You.draw(t);
win << "Points: " << pts << "\n";
win.render();
win.setPosition(-1,-1);
in = win.getchar();
win.clearBack();
win.clear();
win.setPosition(0,0);
if (in == 'w')
You.moveRelative(0,-50);
else if (in == 's')
You.moveRelative(0,50);
else if (in == 'a')
You.moveRelative(-50,0);
else if (in == 'd')
You.moveRelative(50,0);
}
return 0;
}
However I run into the error... "Book" was not declared in this scope.
The header play.h file's code is as follows..
#include "Lib110ct/Lib110ct.h"
#include <cstdlib>
//Player class, used to create the controllable character.
class Player
{
protected:
double xpos, ypos;
public:
Player(){};
//constructor, user input variables stored as xpos and ypos, then player is drawn
Player(double x, double y)
{
xpos = x;
ypos = y;
}
//draws the new position of the turtle
void draw(Turtle* t)
{
t->setPosition(xpos,ypos);
t->penDown();
for (int i = 0; i < 180; i++ )
{
t->turn(2);
t->moveForward(1);
}
}
double getX(){ return xpos; } //returns the x position of the player
double getY(){ return ypos; } //returns the y position of the player
//moves the player by x increment and y increment (leave x or y as 0 to not move along the respective axis)
//relative to current position
void moveRelative(double xadd, double yadd)
{
if (xpos+xadd > 0 && xpos+xadd < 1024 && ypos+yadd > 0 && ypos+yadd < 768)
{
xpos += xadd;
ypos += yadd;
}
}
};
//Food class. Not controlled by player
class Food
{
protected:
double xpos, ypos, xdir, ydir;
public:
//constructor, random x and y co-ordinates stored as xpos and ypos. food is drawn in those co-ordinates
//random xdir and ydir, food initially moves in this direction
Food()
{
xpos = rand() % 1024 + 1;
ypos = rand() % 768 + 1;
xdir = rand() % 41 - 20;
ydir = rand() % 41 - 20;
}
//draws the food
void draw(Turtle* t)
{
t->setPosition(xpos,ypos);
t->penDown();
for (int i = 0; i < 4; i++ )
{
t->turn(90);
t->moveForward(20);
}
}
double getX(){ return xpos; } //returns the x position of the player
double getY(){ return ypos; } //returns the y position of the player
//moves the food to a specific location, not relative to current position
void setPosition(double x,double y)
{
xpos = x;
ypos = y;
}
//moves the food in the specified directions, given by the variables xdir and ydir
void move()
{
if (!(xpos+xdir>0 && xpos+xdir<1024 && ypos+ydir>0 && ypos+ydir<768))
{
xdir = -xdir;
ydir = -ydir;
}
xpos += xdir;
ypos += ydir;
}
//returns TRUE if the player is in a close proximity to the food, otherwise false
bool isEatenBy(Player Play)
{
double pX = Play.getX();
double pY = Play.getY();
double fX = getX();
double fY = getY();
return pX+60>fX && pX-20<fX & pY+40>fY && pY-40<fY;
}
};

Answer 1

You are trying to use an array of type 'Book', which is probably a class you intended to define:
Book B[NumOfBook];
However, you have not defined this in the code you posted above, or in the code you put in Dropbox.
Either add a definition for class Book to play.h, or create a new header file, perhaps called book.h, with the definition and then #include "book.h" in your cpp file. Your Book class will need methods to setPosition, move and draw.