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
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 46

Tweet

Other forums

CHECK A STRING FOR ' " ' (DOUBLE QUOTES)
I am checking for delimiter (.!?) and if there is a " after a sentence then it should neglect a

Output Buffering question
Hi all,

I've been trying to wrap my head around output buffering. So far I've found tons of

Really need helps regarding Pagination with Sort
I need someone helps regarding pagination problem...i actually want to make my page limited to let s

checkbox update
I am having a brain fart right now and i cant remember how to do this. if anyone could help that wou

PHP Display Telephone Number On Referrer
I have used the php below to show a different telephone number in the header of the site depending u

Somebody hacked into my site and changed coding >>> URGENT HELP NEEDED <<<
I am not that much into programming , but somebody is hacking to my site and injecting some kind of

=> and <=
So I was digging through some code when I came across the <= operator. This is the first tim

Asset Transfer from One plant to another within same company code
Hi,

Please advise how to transfer one asset from one plant to another plant within same c

Onclick problem in Firefox
Hi,
I am using a . It doesn't seem to

EXplanation help
Hey all,

I am still fairly new to PHP programming and I am trying to put together a page wher