void info(a, fage, eage)
struct agent a;
int *fage, *eage;
{
    int i;
    *fage=MAXINT;
    *eage=-1;
    for (i=0; i<10; i++) {
        if (a.friends[i].sex==female && a.friends[i].age<*fage)
            *fage=a.friends[i].age;
        if (a.enemies[i].sex==male && a.enemies[i].age>*eage)
            *eage=a.enemies[i].age;
    }
    if (*fage=MAXINT) *fage=-1;
}