Thread: Beginner!

Originally Posted by JonathanS

rand( value % 100 ) is in the range 0 to 99
rand( value % 100 + 1 ) is in the range 1 to 100
rand( value % 30 + 1985 ) is in the range 1985 to 2014

This is either a mistake or some very misleading notation.
You mean something like:

Code:

value = rand() % 100;
value = rand() % 100 + 1;
value = rand() % 30 + 1985;

Originally Posted by JonathanS

correspond to miliseconds on your computer clock

time() usually returns seconds (usually since Jan 1, 1970), not milliseconds.

And in this code

Originally Posted by JonathanS

Code:

        int range_hit = 16;
        int r = rand()%20;
        if(r<=range_hit)

The if condition actually has a 17 out of 20 (85%) chance of being true.

Since Valdo wants a 70% chance of a bullseye, this would be a good way of doing it:

Code:

if (rand() <= (RAND_MAX / 10) * 7) {
    // 70% chance of executing this block
}
else {
    // 30% chance of executing this block
}