I have an issue with the random generator. I use the code;
myNumber = rand() % 100; //for numbers 1 - 100;
My problem is, the numbers getting generated have a pattern. Such that the first output is 33, 43, 62, 29, 0, 8 ...
Why is this so?
I am on Windows 8, Using Netbeans 8, with Cygwin installed.
Thanks in advance...
Jump to PostI would be remiss if I did not point you at this:
https://channel9.msdn.com/Events/GoingNative/2013/rand-Considered-Harmful
I would go so far as to say never use
rand(), even in toy programs just for fun (because you might as well practice not usingrand()to reduce the chance of ever using …
Jump to PostI would go so far as to say never use rand()
Unless you wrote it, of course. ;) I'm at the point with my C standard library that I use it instead of the built-in standard library for most personal work.
randis implemented as the Mersenne Twister, …
Why is this so?
rand is always seeded with 1 by default, so unless you change the seed with srand, the sequence will be consistent.
I would be remiss if I did not point you at this:
https://channel9.msdn.com/Events/GoingNative/2013/rand-Considered-Harmful
I would go so far as to say never use rand(), even in toy programs just for fun (because you might as well practice not using rand() to reduce the chance of ever using it accidentally).
I would go so far as to say never use rand()
Unless you wrote it, of course. ;) I'm at the point with my C standard library that I use it instead of the built-in standard library for most personal work. rand is implemented as the Mersenne Twister, so I know it's solid at least in terms of the underlying algorithm.
In C++, I agree that there's really no excuse to ignore the <random> library if your compiler conforms sufficiently to C++11.
Read this tutorial on random number generators and you will understand better how all this works: http://www.phy.ornl.gov/csep/CSEP/RN/RN.html
Read this tutorial on random number generators and you will understand better how all this works: http://www.phy.ornl.gov/csep/CSEP/RN/RN.html
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