重复直到用户按下回车

Question

我想要一个循环，重复直到用户按下回车键。

我试过 while(getchar != '\n'){} 但是这个 waitet 每次都在输入。现在我不知道该怎么做。

do {
        clear;//system("cls");
        printf("\nPress [enter] to continue");
        printf(".");
        Sleep(500);
        printf(".");//should give a output with press enter to continue... and wait after every point.
        Sleep(500);
        printf(".");
        Sleep(500);
    }while(getchar() != '\n');

Answer 1

以下代码来自kbhit for linux

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

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)
{
  while(!kbhit())
    puts("Press a key!");
  printf("You pressed '%c'!\n", getchar());
  return 0;
}

重复直到用户按下回车

Repeat until user presses enter

c

while-loop

getchar