c - 2048年的C，搬家的问题

Question

我正在用 C 语言制作 2048 游戏，我需要帮助。移动是通过按W, A, S,D键进行的，例如W向上移动，S向下移动。

但是，在每封信之后，您都必须按下enter才能接受。我怎样才能让它在不按的情况下工作enter？

Answer 1

There is no standard library function in c to accomplish this; instead you will have to use termios functions to gain control over the terminal and then reset it back after reading the input.

I came across some code to read input from stdin without waiting for a delimiter here.

If you are on linux and using a standard c compiler then getch() will not be easily available for you. Hence i have implemented the code in the link and you just need to paste this code and use the getch() function normally.

#include <termios.h>
#include <stdio.h>

static struct termios old, new;

/* Initialize new terminal i/o settings */
void initTermios(int echo) 
{
  tcgetattr(0, &old); /* grab old terminal i/o settings */
  new = old; /* make new settings same as old settings */
  new.c_lflag &= ~ICANON; /* disable buffered i/o */
  new.c_lflag &= echo ? ECHO : ~ECHO; /* set echo mode */
  tcsetattr(0, TCSANOW, &new); /* use these new terminal i/o settings now */
}

/* Restore old terminal i/o settings */
void resetTermios(void) 
{
  tcsetattr(0, TCSANOW, &old);
}

/* Read 1 character - echo defines echo mode */
char getch_(int echo) 
{
  char ch;
  initTermios(echo);
  ch = getchar();
  resetTermios();
  return ch;
}

/* Read 1 character without echo */
char getch(void) 
{
  return getch_(0);
}

int main()
{
    int ch;

    ch = getch();//just use this wherever you want to take the input

    printf("%d", ch);

    return 0;
}

Answer 2

您要的是名为 kbhit() 的函数，如果用户按下键盘上的某个键，该函数将返回 true。您也可以使用此功能从使用中获取输入，如参见

char c= ' ';
while(1){
    if(kbhit())
        c=getch();
    if(c=='q')// condition to stop the infinite loop 
        break;
}