[問題] 貪食蛇遇到阻斷式getch問題

看板C_and_CPP作者andrew771027 (老柏~)時間10年前 (2015/08/13 21:40)推噓2(2推 0噓 46→)

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開發平台(Platform): (Ex: VC++, GCC, Linux, ...) Mac OS (g++) 額外使用到的函數庫(Library Used): (Ex: OpenGL, ...) ncurses.h 問題(Question)：目前寫的貪食蛇練習題，可以分別讓蛇自動前進及按上下左右鍵盤前進但嘗試想把兩個功能合併，卻疑似發生阻斷，已經爬文過但還不知道怎麼解在下面的程式碼有highlight，求解餵入的資料(Input)：預期的正確結果(Expected Output)：錯誤結果(Wrong Output)：程式碼(Code)：(請善用置底文網頁, 記得排版) #include <iostream> #include <ncurses.h> #include <stdio.h> #include <stdlib.h> #include <time.h> #include <unistd.h> #include <termios.h> #include <fcntl.h> using namespace std; //int move(int y , int x); #define Initial_Length 5 #define width 50 #define hieght 20 typedef struct snack{ int x; int y; }Snack; Snack Sbody[1000]; Snack Newbody; Snack Food; void Show_Bulletinboard() { mvaddstr(2,55,"Press Enter or Space to start."); mvaddstr(6,55,"Press P or p to pause."); mvaddstr(10,55,"Press to arrow key to move."); //加一個狀態欄位 //mvaddch(10,55,'\x18\x19\x1a\x1b'); mvaddstr(14,55,"Grade:"); mvaddstr(18,55,"Speed:"); } void Initial_Snack_Position() { for (int i = 0; i < Initial_Length ; i++) { Sbody[i].y = 2; Sbody[i].x = Initial_Length + 1 - (i); } } void Print_Snack(int *Length) { for (int i = 0; i < *Length ; i++) { if (i == 0) { //改變頭的顏色 mvaddstr(Sbody[i].y, Sbody[i].x , "@"); //printf("\033[33m@"); } else { mvaddstr(Sbody[i].y, Sbody[i].x , "@"); } } } void Print_Dot(int Pos_y, int Pos_x, char ch ) { mvaddch(Pos_y, Pos_x , ch); //printf("\033[33m@"); } void Initial_GameZone() { for (int j = 1 ; j <= hieght ; j++) { for (int i = 1; i <= width ; i++) { if (j == 1 || j == hieght) { Print_Dot(j,i,'#'); } else if(i == 1 || i == width) { Print_Dot(j,i,'#'); } } } } void Change_Snack_Position(int * Length) { for(int i = *Length -1 ; i >= 0 ; i--) { if (i == 0) //移動頭 { Sbody[i].x = Newbody.x; Sbody[i].y = Newbody.y; Print_Dot(Sbody[i].y , Sbody[i].x , '@'); } else if (i == *Length -1) //清除尾巴 { Print_Dot(Sbody[i].y, Sbody[i].x, ' '); Sbody[i].x = Sbody[i-1].x; Sbody[i].y = Sbody[i-1].y; } else{ //移動身體 Sbody[i].x = Sbody[i-1].x; Sbody[i].y = Sbody[i-1].y; Print_Dot(Sbody[i].y , Sbody[i].x, '@'); } } } void Create_Food(int * Length) //產生食物的位置 { int count = 0; srand(time(NULL)); do { Food.x = (rand() % (width-2) ) +2; Food.y = (rand() % (hieght-2)) +2; for (int i = 0; i < *Length ; i++) { if (Sbody[i].x != Food.x && Sbody[i].y != Food.y) { count = count + 1; } } }while ( count == *Length); Print_Dot(Food.y , Food.x , '*'); } void isEaten(int *Length) //判斷是否吃到食物 { if (Sbody[0].x == Food.x && Sbody[0].y == Food.y) { *Length = *Length + 1; //當吃到新的果實，長出一節，位置在食物的位置 Sbody[*Length].x = Food.x; Sbody[*Length].y = Food.y; Print_Dot(Sbody[*Length].y,Sbody[*Length].x , '@'); Create_Food( Length ); } } bool isGameOver(int * Length) { bool flag = true; for (int i = 1 ; i < *Length ; i++) //頭碰到身體 { if (Sbody[0].x == Sbody[i].x && Sbody[0].y == Sbody[i].y) { flag = false; } } for (int n = 1 ; n <= hieght ; n++) //頭碰到牆 { for (int m = 1; m <= width ; m++) { if (n == 1 || n == hieght) { if (Sbody[0].x == m && Sbody[0].y == n) { flag = false; } } else if(m == 1 || m == width) { if (Sbody[0].x == m && Sbody[0].y == n) { flag = false; } } } } return flag; } int kbhit(void) { struct termios oldt, newt; int ch; int oldf; tcgetattr(STDIN_FILENO, &oldt); newt = oldt; newt.c_lflag &= ~(ICANON | ECHO); tcsetattr(STDIN_FILENO, TCSANOW, &newt); oldf = fcntl(STDIN_FILENO, F_GETFL, 0); fcntl(STDIN_FILENO, F_SETFL, oldf | O_NONBLOCK); ch = getchar(); tcsetattr(STDIN_FILENO, TCSANOW, &oldt); fcntl(STDIN_FILENO, F_SETFL, oldf); if(ch != EOF) { ungetc(ch, stdin); return 1; } return 0; } int main(void) { WINDOW * w; //產生視窗 w=initscr(); keypad(stdscr,TRUE); //啟動鍵盤特殊按鍵功能 int GameKey =1; noecho(); int Length = Initial_Length; Initial_GameZone(); //產生遊戲邊筐 Show_Bulletinboard(); Initial_Snack_Position(); Print_Snack(&Length); Create_Food(&Length); while (GameKey != 27) { if ( kbhit() ) { GameKey = getch(); //根據鍵盤上下左右間決定移動方向 switch(GameKey) { case KEY_UP: Newbody.y = Sbody[0].y -1; Newbody.x = Sbody[0].x; setbuf(stdin,NULL); break; case KEY_DOWN: Newbody.y = Sbody[0].y +1; Newbody.x = Sbody[0].x; setbuf(stdin,NULL); break; case KEY_LEFT: Newbody.y = Sbody[0].y; Newbody.x = Sbody[0].x -1; setbuf(stdin,NULL); break; case KEY_RIGHT: Newbody.y = Sbody[0].y; Newbody.x = Sbody[0].x +1; setbuf(stdin,NULL); break; default:; } } else //依據原本的方向前進 { if((Sbody[0].x - Sbody[1].x) == -1) //自動想左移動 { Newbody.y = Sbody[0].y; Newbody.x = Sbody[0].x -1; } else if ((Sbody[0].x - Sbody[1].x) == 1) //自動向右移動 { Newbody.y = Sbody[0].y; Newbody.x = Sbody[0].x +1; } else if ((Sbody[0].y-Sbody[0].y)== -1) //自動向上移動 { Newbody.y = Sbody[0].y -1; Newbody.x = Sbody[0].x; } else if ((Sbody[0].y - Sbody[1].y) == 1) //自動向下移動 { Newbody.y = Sbody[0].y +1; Newbody.x = Sbody[0].x; } else { } sleep(1); refresh(); } Change_Snack_Position(&Length); isEaten (&Length); //GameKey = 1; if ( isGameOver(&Length) == false) //判斷是否GameOver 吃到自己或是撞牆 { break; } } //getchar(); delwin(w); return 0; } http://codepad.org/XP42S3rE 補充說明(Supplement)： -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 59.115.156.66 ※ 文章網址: https://www.ptt.cc/bbs/C_and_CPP/M.1439473205.A.511.html

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