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

Redistributing dependent dlls
Hai all ,

I have created an application in VC++ using VS2008 in a development machine which r

Request.UrlReferrer
I need to make it so that a page can only be loaded when a button is clicked on a specific page. I d

Display the user's weight lost in the past week
Hello everyone,

I am working on a weight loss app for my site, and I want to display the user

Do not allow posting of whitespace
Currently the script below works if the user does not type a name/message, but if i create a whitesp

add text and number image
hi guys ..

ok see i want the user to add their name and pick a number then click get it and i

Create PHP table grid help, please
I have a MySQL database setup, now it's time for the table (gridview) design in php. Here's the prob

Multiple upload and Resize
I would like some help on my script I have the for my index.php

////

<html&

Displaying Site Logo/Icon on a Title tag
really need some help out here. I want to insert a Logo/Icon just like the one close to the "PH

FlashVar function how to insert variables
Hi guys. Im new in this forum and also new in php programming. Can you help me about this code?
<

Sum of Values in an Array
This is probably really simple... but it's been years since I've written anything, so bare with me!<