Question

Create and implement a C++ class, RandomGenerator, that:

• Allocates and stores an array of random floating point numbers between 0 and 1.
• The size of the array is passed into the constructor.
• The class contains a next() function which returns a new random number from the array every time the next() function is called (without calling rand()).
• Deletes any memory allocated on the heap when the class is destroyed.
• Note: This trick pre-calculates random numbers and saves execution time by storing values in memory.

#include <iostream>
#include <cstdlib>
using namespace std;

Class RandomGenerator {
...
}

int main() {
    RandomGenerator random(100000);
    for (int i = 0; i < 4; i++) {
            cout << random.next() << endl;
    }
    return 0;
}

output:

0.394383
0.783099
0.79844
0.911647

Answer 1

Thanks for the question. Below is the code you will be needing. Let me know if you have any doubts or if you need anything to change.

If you are satisfied with the solution, please leave a +ve feedback : ) Let me know for any help with any other questions.

Thank You!
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#include <iostream>
#include <cstdlib>
using namespace std;

class RandomGenerator {
   private:
       double *p;
       int index;
   public:
       RandomGenerator(int size){
           p = new double[size];
           index = 0;
           for(int i=0; i<size;i++) p[i] = (double) rand() / RAND_MAX;
       }
       double next() {
           return p[index++];
       }
       ~RandomGenerator(){
           delete[] p; //Deletes any memory allocated on the heap
       }
};

int main() {
RandomGenerator random(100000);
for (int i = 0; i < 4; i++) {
cout << random.next() << endl;
}
return 0;
}

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