按下键盘后如何终止正在执行的程序

Question

Here is my code, my goal for this stage is creating an animation of ASCII, terminate it once any character is entered. I use getch() for this stage but it seems not to work.

#include <stdio.h>
#include <time.h>
#include <curses.h>

int main() {
    int i, j, ms = 250;    
    const char *a = "*";
    struct timespec delay;
    delay.tv_sec = 0;
    delay.tv_nsec = ms * 1000000L;
    while(1) {
        for (i = 0; i < 4; i++) {
            printf("%c", a[i]);
            fflush(stdout);
            nanosleep(&delay, NULL);
            printf("\b");
        }
        if(getch() != -1)break;
        //printf("%c,%d\n",buffer,buffer);
    }
    return 0;
}

Answer 1

Before using any curses function, you need to call the initsrc function, manual say:

#include <curses.h>

WINDOW *initscr(void);

Description

initscr is normally the first curses routine to call when initializing a program.

The initscr code determines the terminal type and initializes all curses data structures. initscr also causes the first call to refresh to clear the screen. If errors occur, initscr writes an appropriate error message to standard error and exits; otherwise, a pointer is returned to stdscr.