Need help with movement in tetris c++ game
I am making a tetris game for my intro c++ class. It is in c++ using Dark GDK.
I am getting one error:
Code:
1>i:\ school\ spring 2012\comsc-048\tetris code\tetris code\tetris code\tetris\dark gdk - tetris\dark gdk - tetris\main.cpp(208) : error C2451: conditional expression of type 'void' is illegal
1>Expressions of type void cannot be converted to other types
1>Dark GDK - tetris - 1 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Here is the code:
Code:
//Dark GDK - The Game Creators - www.thegamecreators.com
//the wizard has created a very simple project that uses Dark GDK
//it contains the basic code for a GDK application
//whenever using Dark GDK you must ensure you include the header file
#include "DarkGDK.h"
//Global
int Block_Size=20;
int grid[20][10];
const DWORD Red = dbRGB(255,0,0);
const DWORD Green = dbRGB(0,255,0);
const DWORD Blue = dbRGB(0,0,255);
const DWORD Magenta = dbRGB(255,0,255);
const DWORD Black = dbRGB(0,0,0);
const DWORD White = dbRGB(255,255,255);
const DWORD Yellow = dbRGB(255,255,0);
const DWORD Cyan = dbRGB(0,255,255);
const DWORD Orange = dbRGB(255,165,0);
const DWORD Grey = dbRGB(177,177,177);
//end global
//Classes
class Block {
private:
DWORD color;
//int blocks[4];
public:
int x,y;
Block();
Block(int, int, DWORD);
void draw();
void move(int, int);
void clear();
//bool col();
};
Block::Block(){
x = 0;
y =0;
color = White;
}
//Methods (Block)
Block::Block(int X, int Y, DWORD COLOR)
{
x=X;
y=Y;
color=COLOR;
}
void Block::draw()
{
int x1, y1, x2, y2;
x1=x*Block_Size;
y1=y*Block_Size;
x2=x1+Block_Size;
y2=y1+Block_Size;
// dbInk(color, Black);
dbBox(x1,y1,x2,y2);
}
void Block::clear()
{
dbInk(Black, Black);
//dbBox(x1,y1,x2,y2);
draw();
}
void Block::move(int dx, int dy)
{
x=x+dx;
y=y+dy;
dbInk(color, Black);
draw();
}
//End Method (Block)
class Shape {
private:
Block blocks[4];
//int pos[8];
public:
int pos[8];
DWORD color;
Shape();
void make_ishape();
void move_shape(int,int);
void draw_shape();
bool col();
};
//Methods (Shape)
Shape::Shape() {
blocks[0] = Block(0,0, Red);
blocks[1] = Block(0,0, Red);
blocks[2] = Block(0,0, Red);
blocks[3] = Block(0,0, Red);
}
bool Shape::col()
{
for (int i=0; i<=4; i++)
{
if (blocks[i].y >= 19)
{
return false;
}
/*/else if (blocks[i].x >= 0 && blocks[i].x <= 9)
{
return false;
}/*/
}
return true;
}
void Shape::make_ishape()
{
blocks[0] = Block(pos[0],pos[1],Blue);
blocks[1] = Block(pos[2],pos[3],Blue);
blocks[2] = Block(pos[4],pos[5],Blue);
blocks[3] = Block(pos[6],pos[7],Blue);
}
void Shape::draw_shape()
{
for (int i=0; i<4; i++)
{
blocks[i].draw();
}
}
void Shape::move_shape(int dx, int dy)
{
for (int i=0; i<4; i++)
{
blocks[i].clear();
}
for (int i=0; i<4; i++)
{
blocks[i].move(dx,dy);
}
}
class I_Shape: public Shape{
public:
I_Shape(int,int);
private:
DWORD color;
//int pos[8];
};
//Methods (I_Shape)
I_Shape::I_Shape(int x, int y):Shape()
{
//make_shape(pos[8],color);
color=Blue;
pos[0]=x-1;
pos[1]=y;
pos[2]=x;
pos[3]=y;
pos[4]=x+1;
pos[5]=y;
pos[6]=x+2;
pos[7]=y;
//Shape(); //makes one block
make_ishape(); //makes I_Shape
}
// the main entry point for the application is this function
void DarkGDK ( void )
{
I_Shape First(5,0);
// turn on sync rate and set maximum rate to 1 fps
dbSyncOn ( );
dbSyncRate (2);
First.draw_shape();
//First.move_shape(5,4);
// our main loop
while ( LoopGDK ( ) )
{
if (First.col())
{
if (dbLeftKey())
{
First.move_shape(-1,0);
}
else if (dbRightKey())
{
First.move_shape(1,0);
}
else if (First.move_shape(0,1))
{
First.move_shape(0,1);
}
}
// update the screen
dbSync ( );
//dbWaitKey();
}
// return back to windows
return;
}
