Thread: Help

Hello,
first of all i must say that i'm new in programming and especially in c++.also i m sorry for my bad english..i read somewhere for function rand and i have some questions about that.i read that to find random numbers the type is x=low+rand()%(high-low+1).That i get it but how i can to have some exceptions.For exaple to find random numbers between -10 and 10 apart of 0...What i did was to wrote x=rand()%21-10;
x!=0;
but still appeared the 0 and i don t know what to do.
thanks in advance

Code:

x = rand() % 20;
if (x < 10)
{
    x -= 10;
}
else
{
    x -= 9;
}

or

Code:

do
{
    x = rand() % 21 - 10;
} while (x == 0);

Originally Posted by DRK

Code:

x = rand() % 20;
if (x < 10)
{
    x -= 10;
}
else
{
    x -= 9;
}

or

Code:

do
{
    x = rand() % 21 - 10;
} while (x == 0);

Thank you very much!!!What was my mistake??