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C++ Random Numbers

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Join Date: Oct 2007

Posts: 11

Reputation: AnthIste is an unknown quantity at this point

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AnthIste

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Re: C++ Random Numbers

#31

Oct 21st, 2007

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and let's say i have a range from 2 to N, what should i do to get the output only from 2 to N and not 0 to N?because what's given in the previous thread is a function to choose from 0 to N.
thank you

Say you want a random number from 2 to n where n is 15, you would do the following:

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int n = 15;
int random_int;
 
random_int = (rand()%n-2)+2;
int n = 15;
int random_int;

random_int = (rand()%n-2)+2;

lets look at the min/max scenarios.

MIN:
Should be 2 (right?)
so you random 0. But you said +2 at the end. so you get 2. which is minimum.

MAX:
should be 15. But max of (15-2) is 13. But you added 2. So its 15.

Problem solved

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