#include <stdio.h>
#include <stdlib.h>
#include <error.h>
#include <errno.h>


//By default stdout write to terminal which is line buffered
// \n, fflush, setbuf
int main(void){ 
    printf("Hello");  

    int *p = NULL;       
    *p = *p + 1;         

    printf("goodbye\n");                    
    return 0;            
}