Architecture Exercises: C language Realization Snake (four): Receive button change the direction of the snake

Create a thread, receive keystrokes, change the direction of the snake:

Depending on the direction of the keypad value:

' 2 ': The Snake is descending

' 4 ': Snake to the left.

' 6 ': Snake right.

' 8 ': The Serpent is ascending

Source:

#include <stdio.h> #include <string.h> #include <unistd.h> #include <stdlib.h> #include < time.h> #include <curses.h> #include <curses.h> #include <stdio.h> #include <stdlib.h># Include <unistd.h> #include <string.h> #include <ncurses.h> #include <unistd.h> #include < time.h> #include <string.h> #include <stdlib.h> #include <pthread.h> #include <errno.h># Define Game_width 50#define game_higth 25int targetgenerate (int *x_site, int *y_site) {int seconds= time ((time_t*) NULL); * Y_site = ABS (Seconds*random ())%game_higth;*x_site = ABS (Seconds*random ())%game_width;return 0;} typedef unsigned char uchar;typedef struct snakeinfo{int numparts;/* How many parts, snake body divided by number of segments */int lenparts[game_width];/ * The length of each segment of the snake body */int xpartshead[game_width];/* The x-coordinate of paragraph I of the snake body, the initial value is 1 */int ypartshead[game_width];/* snake body the y-coordinate of paragraph I, the initial value is 1 */uchar The direction;/* snake is currently moving in the direction of, 2: Next, 4: Left, 6: Right, 8: Upper */int (*movedown) (window *win), int (*moveup) (window *win);NT (*moveleft) (window *win); int (*moveright) (window *win);} snakest;static char chardir = 6;static Snakest snake = {1,{1,},{game_width/2,},{game_higth/2,}, 6};/* initial value The snake body is 1 segments long, the first paragraph is 1, Initial right movement, the initial position of the snake in the middle */int snakemove (window *win); int snakemovedown (window *win) {snake.ypartshead[0] + = 1;return 0;} int Snakemoveup (WINDOW *win) {snake.ypartshead[0]-= 1;return 0;} int Snakemoveleft (WINDOW *win) {snake.xpartshead[0]-= 1;return 0;} int Snakemoveright (WINDOW *win) {snake.xpartshead[0] + = 1;return 0;} int Snakeinit (WINDOW *win) {int i;for (i=0; i<snake.lenparts[0];i++) {MVWPRINTW (win,snake.ypartshead[0], SNAKE.XPARTSHEAD[0], "*");} Snake.movedown = Snakemovedown;snake.moveup = Snakemoveup;snake.moveleft = snakemoveleft;snake.moveright= Snakemoveright;snake.direction = 6;return 0;} int snakemove (Window *win) {snake.direction = chardir;printf ("snake.direction:%d\n", snake.direction); switch ( snake.direction) {case 2:snake.movedown (win); Break;case 4:snake.moveleft (Win); Break;case 6:snake.moveright (Win); Break;case 8:snake.moveup (Win); break;default:printf ("Invalid direct!\n"); return-1;}} int framecreate (WINDOW *win,int x_site, int y_site) {int I, j;for (j=0;j<game_higth;j++) {for (i=0;i<game_width;i++ {if (i = = Snake.xpartshead[0] && j = = Snake.ypartshead[0]) {MVWPRINTW (win,j,i, "+");} else if (i = = X_site && j = = Y_site) {mvwprintw (Win,j,i, "*");} else if (j = = | | J ==0) {mvwprintw (Win,j,i, "-");} else if (1 = = i) {mvwprintw (win,j,i, "|");} else if (i== (game_width-1)) {MVWPRINTW (win,j,i, "|");} else {MVWPRINTW (win,j,i, "");}}} return 0;} static int need_new_target = 1;static int x_site, Y_site;int snakecreate (WINDOW *win) {int I, j;if (need_new_target = = 1) {TA Rgetgenerate (&x_site, &y_site); need_new_target = 0;} Snakeinit (Win); Snakemove (Win); Framecreate (Win, X_site, Y_site); return 0;} /*resource ncurses_newwin (int rows, int cols, int y, int x), Ncurses_newwin () Creates a new window to draw elements in. W Indows can be positioned using X, Y, rows and cols. When creating additional windows, reMember to use NCURSES_GETMAXYX () to the check for available space, as terminal size was individual and may vary. The return value is a resource ID used to differ between multiple windows.*/void* get_new_direction (void* unused) {while ( 1) {Chardir = GetChar ();p rintf ("chardir:%c", Chardir), switch (chardir) {case ' 2 ': Chardir = 2;break;case ' 4 ': Chardir = 4; Break;case ' 6 ': Chardir = 6;break;case ' 8 ': Chardir = 8;break;default:break;} Sleep (1);} return NULL;}   int main (int argc, char *argv[]) {int x, y;   time_t t;pthread_t thread_id;pthread_create (&thread_id, NULL, &get_new_direction, NULL);   WINDOW *win;             INITSCR ();           Curs_set (0);           NoEcho ();    Win=newwin (25,50,0,0); Getmaxyx (win,y,x);   printf ("a:%d, b:%d\n", X, y);             Refresh ();      Wrefresh (Win);  while (1) {snakecreate (win); Wrefresh (Win); Sleep (1);} Endwin (); return 0;}

Architecture Exercises: C language Realization Snake (four): Receive button change the direction of the snake