making monster spawn off screen

[nano511]

I want the monster to spawn randomly between -200 and 0, or 640 and 840.

I know i would have to make 2 random numbers, one to pick which set to choose between, and one to choose from the set chosen.

My problem is making the correct ranges

[eraggo]

err..?

int n = some_fancy_random_number_generator();
if ((n>=-200 && n<=0) || (n>=640 && n<=840)) {
// do your magic
}

Edit: Fixed typing error

[nano511]

That wont work because what if the if loop doesnt run? The monster just doesnt spawn? HM?

[nano511]

NVM i got it myself -_-

[graham sullivan]

srand(time(0));

int first = rand() - 200;
int second = rand() % 840 + 640;