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C++ Program for Comb Sort?
The basic idea of comb sort and the bubble sort is same. In other words, comb sort is an improvement on the bubble sort. In the bubble sorting technique, the items are compared with the next item in each phase. But for the comb sort, the items are sorted in a specific gap. After completing each phase, the gap is decreased. The decreasing factor or the shrink factor for this sort is 1.3. It means that after completing each phase the gap is divided by 1.3. Time Complexity is O(n log n) for best case. O(n2/2nP) (p is number of increment) for average case and O(n2) for worst case.
Algorithm
CombSort(array, size)
Input − An array of data, and the total number in the array
Output − The sorted Array
Begin gap := size flag := true while the gap ≠ 1 OR flag = true do gap = floor(gap/1.3) //the the floor value after division if gap < 1 then gap := 1 flag = false for i := 0 to size – gap -1 do if array[i] > array[i+gap] then swap array[i] with array[i+gap] flag = true; done done End
Example
include<iostream>
#include<algorithm>
using namespace std;
void display(int *array, int size){
for(int i = 0; i<size; i++)
cout << array[i] << " ";
cout << endl;
}
void combSort(int *array, int size){
int gap = size; //initialize gap size with size of array
bool flag = true;
while(gap != 1 || flag == true){
gap = (gap*10)/13; //minimize gap by shrink factor
if(gap<1)
gap = 1;
flag = false;
for(int i = 0; i<size-gap; i++){ //compare elements with gap
if(array[i] > array[i+gap]){
swap(array[i], array[i+gap]);
flag = true;
}
}
}
}
int main(){
int n;
cout << "Enter the number of elements: ";
cin >> n;
int arr[n]; //create an array with given number of elements
cout << "Enter elements:" << endl;
for(int i = 0; i<n; i++){
cin >> arr[i];
}
cout << "Array before Sorting: ";
display(arr, n);
combSort(arr, n);
cout << "Array after Sorting: ";
display(arr, n);
}Output
Enter the number of elements: 10 Enter elements: 108 96 23 74 12 56 85 42 13 47 Array before Sorting: 108 96 23 74 12 56 85 42 13 47 Array after Sorting: 12 13 23 42 47 56 74 85 96 108
Updated on: 30-Jul-2019
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