>>41

#define BASE 1000

void disp(int n)
{
int d = 1;

if (n < 0) {
printf("-");
n = -n;
}

while (n / BASE >= d) { d *= BASE; }

printf("%d", n / d);
n %= d;
d /= BASE;

while (d) {
printf(",%03d", n / d);
n %= d;
d /= BASE;
}

printf("\n");
}