Display matrix of 0s and 1s Write a function that displays an n-by-n matrix using the following header: Each element is 0 or 1, which is generated randomly. Write a test program that prompts the user to enter n and displays an n-by-n matrix. Here is a sample run: Here is my idea:
You could use boolean values of 0 or 1 based on value of Math.random() as a double between 0.0 and 1.0 and make the random generator much simpler. And you can get rid completely of the coinToss() method. Remove the coin toss method and replace the first conditional with the code above. Math.random(); by itself will return a value between … Read more
Perhaps the whole column full of random numbers is not the best way to do it, but it seems like probably the most practical as @mariusnn mentioned. On that note, this stomped me for a while with Office 2010, and while generally answers like the one in lifehacker work,I just wanted to share an extra step required … Read more
No, it is not possible to seed Math.random(), but it’s fairly easy to write your own generator, or better yet, use an existing one. Check out: this related question. Also, see David Bau’s blog for more information on seeding.
It’s easy in Python. The reason the code you’re looking at is so common is that typically, when you’re talking about a random variable in statistics, it has a range of [0,1). Think of it as a percent, if you’d like. To make this percent suitable for choosing a random element, you multiply it by … Read more
First make some data: Then select some rows at random:
To generate a random value between rangeMin and rangeMax:
Mehrdad Afshari’s answer would do the trick, but I found it a bit too verbose for this simple task. Look-up tables can sometimes do wonders: Note that rand generates poor-quality random numbers.
The simplest way would be to create a list of the possible numbers (1..20 or whatever) and then shuffle them with Collections.shuffle. Then just take however many elements you want. This is great if your range is equal to the number of elements you need in the end (e.g. for shuffling a deck of cards). … Read more
Here’s how Remember to call srand() with a proper seed each time your program starts. [Edit] This answer is obsolete since C++ got it’s native non-C based random library (see Alessandro Jacopsons answer) But, this still applies to C