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/******************************************************************************
Online C++ Debugger.
Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Debug" button to debug it.
Features:
- Sorts unordered whole numbers in the range 0 to 200000000.
- It has a linear complexity O (n).
*******************************************************************************/
#include <iostream>
#include <algorithm>
#include <time.h>
using namespace std;
void pause() {
cout << "Press Enter key to continue.";
cin.ignore().get();
}
int main () {
srand(time(NULL));
if (sizeof(int) >= 4) {
int random_array_length, sorted_array_length, n, zeros = 0, i = 0;
cout << "Enter random numbers array length up to 100000000" << endl;
cin >> random_array_length;
if (random_array_length < 2 or random_array_length > 100000000) {
cout << "Number is out of range!";
return 1;
}
int *array = new int[random_array_length];
int *random_array = new int[random_array_length];
for (n = 0; n < random_array_length; ++n) {
random_array[n] = rand() % random_array_length;
array[random_array[n]] = random_array[n];
}
cout << endl;
int smallest = *min_element(random_array, random_array + random_array_length);
int largest = *max_element(random_array, random_array + random_array_length);
cout << "The smallest number is " << smallest << endl;
cout << "The largest number is " << largest << endl;
pause();
clock_t tStart = clock();
for (n = smallest; n < largest + 1; ++n) {
zeros = (array[n] == 0) ? zeros += 1 : zeros;
}
zeros = (smallest == 0) ? zeros -= 1 : zeros;
sorted_array_length = (largest + 1) - smallest - zeros;
int *sorted_array = new int[sorted_array_length - 1];
sorted_array[0] = smallest;
if (smallest == 0) i = 1;
for (n = smallest; n < largest + 1; ++n) {
if (array[n] != 0) {
sorted_array[i] = array[n];
i = i + 1;
}
}
printf("Time taken: %.2fs\n", (double)(clock() - tStart)/CLOCKS_PER_SEC);
delete[] array;
array = nullptr;
delete[] random_array;
random_array = nullptr;
pause();
/* for (n = 0; n < sorted_array_length; ++n) { // Enable only for small numbers!
cout << n << " - " << sorted_array[n] << endl;
} */
delete[] sorted_array;
sorted_array = nullptr;
}
return 0;
}
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