#include <stdio.h>

int
main()
{
    int a, b;

    a = b = 42;
    printf("After 'a = b = %d;' we have a = %d, b = %d\n", 42, a, b);
    a += b += 2;
    printf("After 'a += b += %d;' we have a = %d, b = %d\n", 2, a, b);
}