i am making a counting program, and i want to add a feature that quits the program, but i don’t really know how to do it. i have seen examples on how to do it, but all of them are for windows. please help

os is linux debian

i tried adding “i = getchar();” and then added an if: “if (i==1){break;}” but nothing happened. i was expecting it to get a value of 1 and then exit.

code:

#include <stdio.h>
//#include <threads.h>
#include <time.h>
#include <unistd.h> 

int main() {
    start:
    struct timespec duration;
    struct timespec remaining; 
    int time, num;  

    duration.tv_sec = 1;    
    duration.tv_nsec = 0;   

    time = 0;
    num = 0;
    
    while(time <= 32767)
    {
      int result = nanosleep(&duration, &remaining);
      num++; //adds 1 to the number
      if (result == 0) 
      {
          printf("Seconds Passed: ");
          printf("%dn", num); //prints the number
          time++; //adds 1 to the time
      }
      else if (result == -1)
      {
         printf("Error with nanosleepn");
         goto start;
      }
    }
    getchar();
    return 0;
}