我想要一个俄罗斯方块的C语言代码

下面是一个简单的俄罗斯方块的C语言代码，代码中用到的图形库为graphics.h，需要安装相应的库才能运行。

#include <graphics.h>
#include <conio.h>
#include <stdlib.h>
#include <time.h>

#define ROWS 20
#define COLS 10
#define BLOCK_SIZE 20

int score = 0;

// 方块的种类和形状
int shapes[7][4][4] = {
    // I
    {
        {0,0,0,0},
        {1,1,1,1},
        {0,0,0,0},
        {0,0,0,0}
    },
    // O
    {
        {0,0,0,0},
        {0,2,2,0},
        {0,2,2,0},
        {0,0,0,0}
    },
    // T
    {
        {0,0,0,0},
        {0,3,0,0},
        {3,3,3,0},
        {0,0,0,0}
    },
    // J
    {
        {0,0,0,0},
        {4,0,0,0},
        {4,4,4,0},
        {0,0,0,0}
    },
    // L
    {
        {0,0,0,0},
        {0,0,5,0},
        {5,5,5,0},
        {0,0,0,0}
    },
    // S
    {
        {0,0,0,0},
        {0,6,6,0},
        {6,6,0,0},
        {0,0,0,0}
    },
    // Z
    {
        {0,0,0,0},
        {7,7,0,0},
        {0,7,7,0},
        {0,0,0,0}
    }
};

// 游戏区域
int gameArea[ROWS][COLS] = {0};

// 当前方块的位置和形状
int curBlock[4][4];
int curRow, curCol, curType;

// 绘制方块
void drawBlock(int row, int col, int type) {
    setfillstyle(SOLID_FILL, type);
    for(int i=0; i<4; i++) {
        for(int j=0; j<4; j++) {
            if(shapes[type][i][j] != 0) {
                bar((col+j)*BLOCK_SIZE, (row+i)*BLOCK_SIZE, 
                    (col+j+1)*BLOCK_SIZE-1, (row+i+1)*BLOCK_SIZE-1);
            }
        }
    }
}

// 擦除方块
void eraseBlock(int row, int col, int type) {
    setfillstyle(SOLID_FILL, BLACK);
    for(int i=0; i<4; i++) {
        for(int j=0; j<4; j++) {
            if(shapes[type][i][j] != 0) {
                bar((col+j)*BLOCK_SIZE, (row+i)*BLOCK_SIZE, 
                    (col+j+1)*BLOCK_SIZE-1, (row+i+1)*BLOCK_SIZE-1);
            }
        }
    }
}

// 判断当前方块是否可以移动
bool canMove(int row, int col, int type) {
    for(int i=0; i<4; i++) {
        for(int j=0; j<4; j++) {
            if(shapes[type][i][j] != 0) {
                int r = row+i, c = col+j;
                if(r<0 || r>=ROWS || c<0 || c>=COLS || gameArea[r][c]!=0) {
                    return false;
                }
            }
        }
    }
    return true;
}

// 在游戏区域中放置当前方块
void placeBlock() {
    for(int i=0; i<4; i++) {
        for(int j=0; j<4; j++) {
            if(curBlock[i][j] != 0) {
                gameArea[curRow+i][curCol+j] = curType;
            }
        }
    }
}

// 消除一行
void clearRow(int row) {
    for(int i=row; i>0; i--) {
        for(int j=0; j<COLS; j++) {
            gameArea[i][j] = gameArea[i-1][j];
        }
    }
    for(int j=0; j<COLS; j++) {
        gameArea[0][j] = 0;
    }
    score++;
}

// 消行
void clearRows() {
    for(int i=0; i<ROWS; i++) {
        bool full = true;
        for(int j=0; j<COLS; j++) {
            if(gameArea[i][j] == 0) {
                full = false;
                break;
            }
        }
        if(full) {
            clearRow(i);
            i--;
        }
    }
}

// 绘制游戏区域
void drawGameArea() {
    setfillstyle(SOLID_FILL, BLACK);
    bar(0, 0, COLS*BLOCK_SIZE-1, ROWS*BLOCK_SIZE-1);
    for(int i=0; i<ROWS; i++) {
        for(int j=0; j<COLS; j++) {
            if(gameArea[i][j] != 0) {
                drawBlock(i, j, gameArea[i][j]);
            }
        }
    }
}

// 初始化游戏
void initGame() {
    score = 0;
    for(int i=0; i<ROWS; i++) {
        for(int j=0; j<COLS; j++) {
            gameArea[i][j] = 0;
        }
    }
}

// 开始游戏
void startGame() {
    initGame();
    cleardevice();
    drawGameArea();
    srand(time(NULL));
    curType = rand() % 7;
    memcpy(curBlock, shapes[curType], sizeof(curBlock));
    curRow = 0;
    curCol = COLS/2-2;
    drawBlock(curRow, curCol, curType);
    while(true) {
        delay(500);
        eraseBlock(curRow, curCol, curType);
        if(canMove(curRow+1, curCol, curType)) {
            curRow++;
        } else {
            placeBlock();
            clearRows();
            curType = rand() % 7;
            memcpy(curBlock, shapes[curType], sizeof(curBlock));
            curRow = 0;
            curCol = COLS/2-2;
        }
        drawBlock(curRow, curCol, curType);
        drawGameArea();
        if(!canMove(curRow+1, curCol, curType)) {
            outtextxy(0, 0, "Game Over!");
            break;
        }
    }
}

int main() {
    initwindow(COLS*BLOCK_SIZE, ROWS*BLOCK_SIZE, "Tetris");
    startGame();
    getch();
    closegraph();
    return 0;
}

注意：该代码只是一个简单的实现，可能存在一些问题，如有需要请自行修改和完善。