#include <stdio.h>

int x = 0;

void inc_x()
{
	asm("push eax \n\t"
	    "mov eax, _x \n\t"
	    "add eax, 1  \n\t"
	    "mov _x, eax \n\t"
	    "pop eax");
}



int main(void)
{
	while(1) // 1 = true in C
	{
		printf("-> ");
		scanf("%d", &x);   // read an int from stdin into x
		if (x < 0) break;  // quit
		inc_x();
		printf("%d\n", x); // print int x followed by newline
	}
	printf("bye\n");
	return 0;
}