snake.c

linux curses 图形编程的例子

                                y++;
                        }
                if (ch_score[i] == '5')
                        while (n<=4) {
                                mvprintw(y, x+length, "%s", *(five+n));
                                n++;
                                y++;
                        }
                if (ch_score[i] == '6')
                        while (n<=4) {
                                mvprintw(y, x+length, "%s", *(six+n));
                                n++;
                                y++;
                        }
                if (ch_score[i] == '7')
                        while (n<=4) {
                                mvprintw(y, x+length, "%s", *(seven+n));
                                n++;
                                y++;
                        }
                if (ch_score[i] == '8')
                        while (n<=4) {
                                mvprintw(y, x+length, "%s", *(eight+n));
                                n++;
                                y++;
                        }
                if (ch_score[i] == '9')
                        while (n<=4) {
                                mvprintw(y, x+length, "%s", *(nine+n));
                                n++;
                                y++;
                        }
                n = 0;
                y = 13;
                i++;
                length += 6;
        }
        attroff(A_BOLD);
        refresh();
}
 
int create_snake(int i, int j)
{
        int m;
 
        for (m=SNAKE_LONG-1; m>=0; m--) {
                snake_box[i][j-m] = 1;
                move_box[i][j-m] = 'r';
        }
}
int create_food(void)
{
        int tmp_n, tmp_l;
        do {
                tmp_n = random_food(1, N-2);
                tmp_l = random_food(1, L-2);
        } while (snake_box[tmp_n][tmp_l] != 0);
        food_n = tmp_n;
        food_l = tmp_l;
        snake_box[food_n][food_l] = 2;
}
 
void initial()                       /* .... curses ..               */
{
        initscr();
        cbreak();
        nl();
        noecho();
        curs_set(0); // set off _
        intrflush(stdscr,FALSE);
        keypad(stdscr,TRUE);
        refresh();
}
 
int snake_right()
{
        current_way = 'r';
        if (snake_box[head_n][head_l+1] == 1) {
                is_game_over = 0;
                return(0);
        }
        if (snake_box[head_n][head_l+1] == 2) { // food
                snake_box[head_n][head_l+1] = 1;
                move_box[head_n][head_l] = 'r';
                head_l++;
                score += level*2;
                create_food();
                return(1);
        }
 
        snake_box[rear_n][rear_l] = 0;
        snake_box[head_n][head_l+1] = 1;
        move_box[head_n][head_l] = 'r';
        head_l++;       // head + 1
 
        if (move_box[rear_n][rear_l] == 'r') {
                rear_l++;
        } else if (move_box[rear_n][rear_l] == 'd') {
                rear_n++;
        } else if (move_box[rear_n][rear_l] == 'l') {
                rear_l--;
        } else if (move_box[rear_n][rear_l] == 'u') {
                rear_n--;
        }
}
 
int snake_down()
{
        current_way = 'd';
        if (snake_box[head_n+1][head_l] == 1) {
                is_game_over = 0;
                return(0);
        }
        if (snake_box[head_n+1][head_l] == 2) { // food
                snake_box[head_n+1][head_l] = 1;
                move_box[head_n][head_l] = 'd';
                head_n++;
                score += level*2;
                create_food();
                return(1);
        }
        snake_box[rear_n][rear_l] = 0;
        snake_box[head_n+1][head_l] = 1;
        move_box[head_n][head_l] = 'd';
 
        head_n++;
        if (move_box[rear_n][rear_l] == 'r') {
                rear_l++;
        } else if (move_box[rear_n][rear_l] == 'd') {
                rear_n++;
        } else if (move_box[rear_n][rear_l] == 'l') {
                rear_l--;
        } else if (move_box[rear_n][rear_l] == 'u') {
                rear_n--;
        }
}
 
int snake_left()
{
        current_way = 'l';
        if (snake_box[head_n][head_l-1] == 1) {
                is_game_over = 0;
                return(0);
        }
        if (snake_box[head_n][head_l-1] == 2) { // food
                snake_box[head_n][head_l-1] = 1;
                move_box[head_n][head_l] = 'l';
                head_l--;
                score += level*2;
                create_food();
                return(1);
        }
        snake_box[rear_n][rear_l] = 0;
        snake_box[head_n][head_l-1] = 1;
        move_box[head_n][head_l] = 'l';
 
        head_l--;
        if (move_box[rear_n][rear_l] == 'r') {
                rear_l++;
        } else if (move_box[rear_n][rear_l] == 'd') {
                rear_n++;
        } else if (move_box[rear_n][rear_l] == 'l') {
                rear_l--;
        } else if (move_box[rear_n][rear_l] == 'u') {
                rear_n--;
        }
}
 
int snake_up()
{
        current_way = 'u';
        if (snake_box[head_n-1][head_l] == 1) {
                is_game_over = 0;
                return(0);
        }
 
        if (snake_box[head_n-1][head_l] == 2) { // food
                snake_box[head_n-1][head_l] = 1;
                move_box[head_n][head_l] = 'u';
                head_n--;
                score += level*2;
                create_food();
                return(1);
        }
        snake_box[rear_n][rear_l] = 0;
        snake_box[head_n-1][head_l] = 1;
        move_box[head_n][head_l] = 'u';
 
        head_n--;
        if (move_box[rear_n][rear_l] == 'r') {
                rear_l++;
        } else if (move_box[rear_n][rear_l] == 'd') {
                rear_n++;
        } else if (move_box[rear_n][rear_l] == 'l') {
                rear_l--;
        } else if (move_box[rear_n][rear_l] == 'u') {
                rear_n--;
        }
}
 
unsigned char my_random(void)
{
        static int seeded;
        unsigned int uint_res;
        unsigned char c1, c2, c3, c4;
        if (!seeded)
        {
                struct timeval tv;
                int retval = gettimeofday(&tv, NULL);
                if (retval != 0)
                {
                        perror("gettimeofday");
                        exit(0);
                }
                srand((unsigned)tv.tv_usec);
                seeded = 1;
        }
        uint_res = rand();
        c1 = uint_res & 0x000000ff;
        c2 = (uint_res >> 8) & 0x000000ff;
        c3 = (uint_res >> 16) & 0x000000ff;
        c4 = (uint_res >> 24) & 0x000000ff;
        return c1 ^ c2 ^ c3 ^ c4;
}
 
int random_food(int min, int max)
{
        int scaled_value;
        int value = my_random();
        value <<= 8;
        value != my_random();
        scaled_value = (double)min;
        scaled_value += ((double)value / (double)65536)*
                          ((double)max - min + 1);
        value = (unsigned short)scaled_value;
        return(value);
}
 
void snake_log()
{
        int openfd;
        char buf[128];
        struct timeval tv;
        struct tm* ptm;
        int retval = gettimeofday(&tv, NULL);
 
        ptm = (struct tm*)localtime(&tv, NULL);
        if ((openfd= open("score.txt", O_WRONLY|O_CREAT|O_APPEND, S_IRUSR|
                                                 S_IWUSR | S_IRGRP |
                                                 S_IWGRP | S_IROTH)) == -1) {
                perror("snake log error");
                exit(0);
        }
        strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S   ", ptm);
        write(openfd, buf, strlen(buf));
        sprintf(buf, "%s\n", ch_score);
        write(openfd, buf, strlen(buf));
 
 
}