#include<stdio.h>

#define abc()  (*f())

int *f()
{
    static int d;
    return &d;
}

int main()
{
    int i;

    abc() = 123;
    i = abc();
    printf("%d\n", i);

    abc() = 321;
    i = abc();
    printf("%d\n", i);

    return 0;
}