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

int g_read_char = -1;

char getch(void){
	if(g_read_char != -1){
		char ch = g_read_char;
		g_read_char = -1;
		return(ch);
	}else{
		char ch = 0;
		read(STDIN_FILENO, &ch, 1);
		return(ch);
	}
}

int main(){
	while(1){
		system("clear");
		printf("aaa");
		printf("bbb");
		getch();		
	}
}