How to generate a random array of integers subject to a certain constraint


Posted on 16th Feb 2014 07:03 pm by admin

I am writing a program that asks the user to enter an integer N and then generates a random array of integers of size 2^N, each of whose entries range from 1 to N+1. The final random array, however, must satisfy the following properties: the integer 1 can be stored in 1 slot, the integer 2 can only be stored in 1 slot, the integer 3 can only be stored in 2 slots, the integer 4 can only be stored in 4 slots... until all 2^N slots are filled with the integers 1, 2, ...,N+1.

I have written some code that asks the user to enter an integer N and then
generates a random array of integers of size 2^N but I cannot generate a random array subject to the constraints that I mentioned above. I have written a function, CheckArray, that returns the value of how many times a certain integer
Did you know?Explore Trending and Topic pages for more stories like this.
appears in the array but I don't know how to use it to help me get my desired random array.

Below is the code I have written so far. Note that the function CheckArray is not called in the program since I don't know how to use it yet.

#include
#include
#include
#include
#include
using namespace std;

int RandomNumber(int m);
int exponentiation(int n);
int CheckArray(int IntegerArray[], int sizeOfArray, int CType);

int main()
{ int N;
int NUMOFCELLS;

cout<< "Enter the maximum number of cell divisions you want: ";
cin>>N;
NUMOFCELLS = exponentiation(N);
cout<<"The maximum number of cells will be: ";

cout< cout<<"n";
cout<<"n";

int sample[128]; // this reserves 128 integer elements
int t;

srand(time(0));
getchar();

for(t = 0; t <= NUMOFCELLS; t++)
{ sample[t] = RandomNumber(N); }

// display the array

for(t = 0; t < NUMOFCELLS; ++t)
{ cout << sample[t] << ' ' ; }

cout<<"n";

getchar();
return 0;
}

int RandomNumber(int m)
{ // generates a random number in the specified range from 0 to (m-1)
int iSecret;
iSecret = rand() % m + 1;
return(iSecret);
}

int exponentiation(int n)
{ int t;
int numberofcells;
numberofcells = 2;
for(t=1; t < n; ++t)
{numberofcells = 2*numberofcells;}

return(numberofcells);
}

int CheckArray(int IntegerArray[], int sizeOfArray, int CType)
{
int accumulator = 0;
int temp;

for(int i = 0; i < sizeOfArray; i++)
{ temp = IntegerArray[i];
if(temp == CType)
{accumulator++;}

}

return accumulator;
}
No comments posted yet

Your Answer:

Login to answer
349 Like 46 Dislike
Previous forums Next forums
Other forums

LSB (PHP 5.3) problem with static value!
hello,

i'm having a problem. static::$text variable gets lost at some point. can someone plea

Bluetooth RSSI & VIsta
Okie I got 4 Bluetooth adapters, a DBT-120 by Dlink, A Zonet Microsoft Bluetooth which is what I use

IF STATEMENT HELP
Hi
i have created a calendar from a table:

Code: Calendar: October 2009
<table w

problem with sql querry in php script
Hello guys,

What I want to do is I want to read out a csv file and then but te conent ot the

Not sure why this script is not working?
Hi I am new to php programing and I was trying to make up a simple script like a captcha but I canno

PHP and MySQL Question/Help
I have a MySQL db with all my servers and all their details like server name, IP, OS, RAM etc etc 26

Update data to upper case in parent/child tables
Hi Gurus!

In production we have a product table and which is being reference by many tabl

Session problem?!?
Hello All! I am very new to the php world but I am working on fixing things that a previous programm

Curl timeout breaks script
So im having difficulties with skipping timeout error in curl
my script calls different functions

Multiple Do / While Statements?
I'm still very new to PHP, and running in to a problem when trying to execute a do/while loop inside

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash