Why do only similar numbers appear in rand()?

I don't know if seed is weird or if I pull land() I keep getting similar numbers.

In my program, I'm going to write a log, so there needs to be a big difference Almost all of them are from 2²⁵ to 2³⁰

²⁵³⁰

What's wrong?

c c++ math random

2022-09-22 15:09

1 Answers

rand can extract numbers from 0 to 2³⁰.

³⁰

If you look at the percentage of the numbers you take out, About 3% is between 0 and 2²⁴, and the remaining 97% is between 2²⁵ and 2³⁰ When you take the log, it's normal to get almost 25 to 30.

²⁴²⁵³⁰

(2²⁵ / 2³⁰ = 2^-5 = 1/32 = 0.03125 = 3.125%)

²⁵³⁰^-5

2022-09-22 15:09

If you have any answers or tips

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