eluosi.txt

C语言写的俄罗斯方块程序 其中的主要逻辑有： （1）由于c的随机性函数不好

/********************************/
/* Desc:    俄罗斯方块游戏                */
/* By:        hoodlum1980                */
/* Email:    [e-mail]            */
/* Date:    2008.03.12 22：30            */
/********************************/
#include <stdio.h>
#include <bios.h>
#include <dos.h>
#include <graphics.h>
#include <string.h>
#include <stdlib.h>
#define true         1
#define false         0
#define BoardWidth    12
#define BoardHeight     23
#define _INNER_HELPER /*inner helper method */
/*Scan Codes Define*/
enum KEYCODES
{
    K_ESC                =0x011b,
    K_UP                =0x4800,        /* upward arrow */
    K_LEFT            =0x4b00,
    K_DOWN            =0x5000,
    K_RIGHT            =0x4d00,
    K_SPACE            =0x3920,
    K_P                =0x1970
};

/* the data structure of the block */
typedef struct tagBlock
{
    char c[4][4];    /* cell fill info array, 0-empty, 1-filled */
    int x;                /* block position cx [ 0,BoardWidht -1] */
    int y;                /* block position cy [-4,BoardHeight-1] */
    char color;        /* block color */
    char size;        /* block max size in width or height */
    char name;        /* block name (the block's shape) */
} Block;

/* game's global info */
int FrameTime= 1300;
int CellSize= 18;
int BoardLeft= 30;
int BoardTop=    30;

/* next block grid */
int NBBoardLeft= 300;
int NBBoardTop=    30;
int NBCellSize=  10;

/* score board position */
int ScoreBoardLeft= 300;
int ScoreBoardTop=100;
int ScoreBoardWidth=200;
int ScoreBoardHeight=35;
int ScoreColor=LIGHTCYAN;

/* infor text postion */
int InfoLeft=300;
int InfoTop=200;
int InfoColor=YELLOW;

int BorderColor=DARKGRAY;
int BkGndColor=BLACK;
int GameRunning=true;
int TopLine=BoardHeight-1;    /* top empty line */
int TotalScore=100;
char info_score[20];
char info_help[255];
char info_common[255];

/* our board, Board[x][y][0]-isFilled, Board[x][y][1]-fillColor */
unsigned char Board[BoardWidth][BoardHeight][2];
char BufferCells[4][4];    /* used to judge if can rotate block */
Block curBlock;        /* current moving block */
Block nextBlock;    /* next Block to appear */

/* function list */
int GetKeyCode();
int CanMove(int dx,int dy);
int CanRotate();
int RotateBlock(Block *block);
int MoveBlock(Block *block,int dx,int dy);
void DrawBlock(Block *block,int,int,int);
void EraseBlock(Block *block,int,int,int);
void DisplayScore();
void DisplayInfo(char* text);
void GenerateBlock(Block *block);
void NextBlock();
void InitGame();
int PauseGame();
void QuitGame();

/*Get Key Code */
int GetKeyCode()
{
    int key=0;
    if(bioskey(1))
    {
        key=bioskey(0);
    }
    return key;
}

/* display text! */
void DisplayInfo(char *text)
{
    setcolor(BkGndColor);
    outtextxy(InfoLeft,InfoTop,info_common);
    strcpy(info_common,text);
    setcolor(InfoColor);
    outtextxy(InfoLeft,InfoTop,info_common);
}

/* create a new block by key number,
* the block anchor to the top-left corner of 4*4 cells
*/
void _INNER_HELPER GenerateBlock(Block *block)
{
    int key=(random(13)*random(17)+random(1000)+random(3000))%7;
    block->size=3;/* because most blocks' size=3 */
    memset(block->c,0,16);
    switch(key)
    {
        case 0:
            block->name='T';
            block->color=RED;
            block->c[1][0]=1;
            block->c[1][1]=1, block->c[2][1]=1;
            block->c[1][2]=1;
            break;
        case 1:
            block->name='L';
            block->color=YELLOW;
            block->c[1][0]=1;
            block->c[1][1]=1;
            block->c[1][2]=1, block->c[2][2]=1;
            break;
        case 2:
            block->name='J';
            block->color=LIGHTGRAY;
            block->c[1][0]=1;
            block->c[1][1]=1;
            block->c[1][2]=1, block->c[0][2]=1;
            break;
        case 3:
            block->name='z';
            block->color=CYAN;
            block->c[0][0]=1, block->c[1][0]=1;
            block->c[1][1]=1, block->c[2][1]=1;
            break;
        case 4:
            block->name='5';
            block->color=LIGHTBLUE;
            block->c[1][0]=1, block->c[2][0]=1;
            block->c[0][1]=1, block->c[1][1]=1;
            break;
        case 5:
            block->name='o';
            block->color=BLUE;
            block->size=2;
            block->c[0][0]=1, block->c[1][0]=1;
            block->c[0][1]=1, block->c[1][1]=1;
            break;
        case 6:
            block->name='I';
            block->color=GREEN;
            block->size=4;
            block->c[1][0]=1;
            block->c[1][1]=1;
            block->c[1][2]=1;
            block->c[1][3]=1;
            break;
    }
}

/* get next block! */
void NextBlock()
{
    /* copy the nextBlock to curBlock */
    curBlock.size=nextBlock.size;
    curBlock.color=nextBlock.color;
    curBlock.x=(BoardWidth-4)/2;
    curBlock.y=-curBlock.size;
    memcpy(curBlock.c,nextBlock.c,16);
    /* generate nextBlock and show it */
    EraseBlock(&nextBlock,NBBoardLeft,NBBoardTop,NBCellSize);
    GenerateBlock(&nextBlock);
    nextBlock.x=1,nextBlock.y=0;
    DrawBlock(&nextBlock,NBBoardLeft,NBBoardTop,NBCellSize);
}

/* rotate the block, update the block struct data */
int _INNER_HELPER RotateCells(char c[4][4],char blockSize)
{
    char temp,i,j;
    switch(blockSize)
    {
        case 3:
            temp=c[0][0];
            c[0][0]=c[2][0], c[2][0]=c[2][2],    c[2][2]=c[0][2], c[0][2]=temp;
            temp=c[0][1];
            c[0][1]=c[1][0], c[1][0]=c[2][1],    c[2][1]=c[1][2], c[1][2]=temp;
            break;
        case 4:    /* only 'I' block arived here! */
            c[1][0]=1-c[1][0], c[1][2]=1-c[1][2], c[1][3]=1-c[1][3];
            c[0][1]=1-c[0][1], c[2][1]=1-c[2][1],    c[3][1]=1-c[3][1];
            break;
    }
}

/* judge if the block can move toward the direction */
int CanMove(int dx,int dy)
{
    int i,j,tempX,tempY;
    for(i=0;i<curBlock.size;i++)
    {
        for(j=0;j<curBlock.size;j++)
        {
            if(curBlock.c[i][j])
            {
                /* cannot move leftward or rightward */
                tempX = curBlock.x + i + dx;
                if(tempX<0 || tempX>(BoardWidth-1))    return false; /* make sure x is valid! */
                /* cannot move downward */
                tempY = curBlock.y + j + dy;
                if(tempY>(BoardHeight-1))    return false; /* y is only checked lower bound, maybe negative!!!! */
                /* the cell already filled, we must check Y's upper bound before check cell ! */
                if(tempY>=0 && Board[tempX][tempY][0]) return false;
            }
        }
    }
    return true;
}

/* judge if the block can rotate */
int CanRotate()
{
    int i,j,tempX,tempY;
    /* update buffer */
    memcpy(BufferCells, curBlock.c, 16);
    RotateCells(BufferCells,curBlock.size);
    for(i=0;i<curBlock.size;i++)
    {
        for(j=0;j<curBlock.size;j++)
        {
            if(BufferCells[i][j])
            {
                tempX=curBlock.x+i;
                tempY=curBlock.y+j;
                if(tempX<0 || tempX>(BoardWidth-1))
                    return false;
                if(tempY>(BoardHeight-1))
                    return false;
                if(tempY>=0 && Board[tempX][tempY][0])
                    return false;
            }
        }
    }
    return true;
}

/* draw the block */
void _INNER_HELPER DrawBlock(Block *block,int bdLeft,int bdTop,int cellSize)
{
    int i,j;
    setfillstyle(SOLID_FILL,block->color);
    for(i=0;i<block->size;i++)
    {
        for(j=0;j<block->size;j++)
        {
            if(block->c[i][j] && (block->y+j)>=0)
            {
                floodfill(
                    bdLeft+cellSize*(i+block->x)+cellSize/2,
                    bdTop+cellSize*(j+block->y)+cellSize/2,
                    BorderColor);
            }
        }
    }
}

/* Rotate the block, if success, return true */
int RotateBlock(Block *block)
{
    char temp,i,j;
    int b_success;
    if(curBlock.size==2)