How do I have multiple rand generators in one code? - c++

Question

I am writing a code to sort an array of random integers using four sorting methods bubble, selection, shell and quick sort. I'm using the same code as a rand generator to create random integers which can be sorted by the sort functions. My issue is that when I run multiple sort methods at the same time; my rand generators create the same set of integers for the arrays. How do I fix this so I can have parallel rand generators in the same program? I cannot use c++11 array or STL vector.
main.cpp
#include <stdio.h>
#include <iostream>
#include <cstdlib>
#include <ctime>
#include "AssortedSorter.h"
using namespace std;
int main() {
AssortedSorter q, q2;
int UserNumOfNumbers;
int bchoice;
cout << " We pick array size (0) or you pick array size (1): ";
cin >> bchoice;
while (bchoice == 0) {
UserNumOfNumbers = 10000;
int array[UserNumOfNumbers];
srand(std::time(0));
for (int i = 0; i < UserNumOfNumbers; i++) {
array[i] = (rand() %200002) + 1;
}
cout << "\nArray Elements ::" << endl;
for (int i = 0; i < UserNumOfNumbers; i++) {
// long b = array[i];
q.quicksort(array, 0, UserNumOfNumbers);
q.bubbleSort(array, UserNumOfNumbers);
cout << " Number of Elements " << i + 1 << "::" << array[i] << endl;
// q.quicksort(array, 0, UserNumOfNumbers);
}
//q.bubbleSort(array, UserNumOfNumbers);}
// q.selectionSort(array, UserNumOfNumbers);}
return 0;
}
while (bchoice == 1) {
cout << "Enter a number between 10 and 20000: ";
cin >> UserNumOfNumbers;
while (UserNumOfNumbers < 10 || UserNumOfNumbers > 20000) {
cout << "Invalid entry! Please enter a valid value: ";
cin >> UserNumOfNumbers;
}
int array[UserNumOfNumbers];
srand(std::time(0));
for (int i = 0; i < UserNumOfNumbers; i++)
array[i] = (rand() %200002) + 1;
cout << "\nArray Elements ::" << endl;
for (int i = 0; i < UserNumOfNumbers; i++) {
q.bubbleSort(array, UserNumOfNumbers);
cout << " Number of Elements " << i + 1 << "::" << array[i] <</*(rand() %200002) + 1 */endl;
}
int arra[UserNumOfNumbers];
srand(std::time(NULL));
for (int j = 0; j < UserNumOfNumbers; j++)
arra[j] = (rand() %200002) + 1;
cout << "\nArray Elements ::" << endl;
for (int j = 0; j < UserNumOfNumbers; j++) {
q.quicksort(arra, 0, UserNumOfNumbers);
cout << " Number of Elements " << j + 1 << "::" << arra[j] << endl;
}
/*int arran[UserNumOfNumbers];
srand(std::time(0));
for (int k = 0; k < UserNumOfNumbers; k++)
arran[k] = (rand() %200002) + 1;
cout << "\nArray Elements ::" << endl;
for (int k = 0; k < UserNumOfNumbers; k++) {
q.selectionSort(arran, UserNumOfNumbers);
cout << " Number of Elements " << k + 1 << "::" <<(rand() %200001) + 1 << endl;}*/
break;
}
}
AssortedSorter.cpp
#include <iostream>
#include "AssortedSorter.h"
//long array;
using namespace std;
int AssortedSorter::partition(int array[], int start, int stop){
int up = start, down = stop - 1, part = array[stop];
long loopCountQ, swapCountQ;
if (stop <= start)
return start;
while (true)
{
while (array[up] < part){
/* loopCountQ++;
cout << " Loop Count++: " << loopCountQ << endl;*/
up++;}
while ((part < array[down]) && (up < down)){
/* loopCountQ++;
cout << " Loop Count--: " << loopCountQ << endl;*/
down--;}
if (up >= down)
break;
swap(array[up], array[down]);{
/* swapCountQ++;
cout << " Swap Count: " << swapCountQ << endl;*/
up++;
down--;}
}
swap(array[up], array[stop]);{
/* swapCountQ++;
cout << " Swap Count: " << swapCountQ << endl;*/
return up;}
}
int AssortedSorter ::getquicksort() const {
return *b;
}
void AssortedSorter :: quicksort(int a[], int start, int stop){
int i, s = 0, stack[20001];
// b = a;
//long * array = (a);
stack[s++] = start;
stack[s++] = stop;
while ( s > 0)
{
stop = stack[--s];
start = stack[--s];
if (start >= stop) continue;
i = partition(a, start, stop);
if
(i - start > stop - i)
{
stack[s++] = start; stack[s++] = i - 1;
stack[s++] = i + 1; stack[s++] = stop;
}
else {
stack[s++] = i + 1; stack[s++] = stop;
stack[s++] = start; stack[s++] = i - 1;
}
}
}
void AssortedSorter:: bubbleSort(int array[], int size) {
int maxElement;
int index;
//long loopcount = 0;
for (maxElement = size - 1; maxElement > 0; maxElement--) {
for (index = 0; index < maxElement; index++) {
if (array[index] > array[index + 1]) {/*loopcount++;
cout << " Loop count: " << loopcount << endl;*/
swap(array[index], array[index + 1]);
}
}
}
}
/*void AssortedSorter :: swap(int &a, int &b){
/* long int swapcount = 0;
{swapcount++;
cout << "Swap count: " << swapcount << endl;}
int temp = a;
a = b;
b = temp;
}*/
void AssortedSorter::selectionSort(int array[], int size)
{
int minIndex, minValue;
long int loopcountsel = 0;
for (int start = 0; start < (size - 1); start++)
{
minIndex = start;
minValue = array[start];
for (int index = start + 1; index < size; index++)
{
if(array[index] < minValue)
{
loopcountsel++;
// cout << "Loop count: " << loopcountsel << endl;
}
if(array[index] < minValue)
{
minValue = array[index];
minIndex = index;
}
}
swap(array[minIndex], array[start]);
}
}
void AssortedSorter :: swap(int &a, int &b)
{
int temp = a;
a = b;
b = temp;
}
AssortedSorter.h
#ifndef SORTER_ASSORTEDSORTER_H
#define SORTER_ASSORTEDSORTER_H
class AssortedSorter {
public:
void quicksort(int a[], int, int);
int getquicksort() const;
int partition(int [], int, int);
void bubbleSort(int[], int);
int getbubblesort() const;
//void swap(int & , int &);
int getswap() const;
void selectionSort(int[], int);
void swap(int &, int &);
private:
int* b;
};
#endif //SORTER_ASSORTEDSORTER_H