Added comb sort in c++

src/cpp/CombSort.cpp

@@ -0,0 +1,86 @@
+// referenced resource given in README.md to understand comb sort
+#include <iostream>
+#include <vector>
+using namespace std;
+vector<int> CombSort(vector<int> vect) {
+    // gap is size of vector
+    int gap = vect.size();
+    // shrink rate is 1.3 according to repo
+    float shrink = 1.3;
+    // bool condition for looping
+    bool looping = true;
+    while (looping) {
+        // adjust gap
+        gap = gap/shrink;
+        // if gap < 1 then make it 1
+        if (gap < 1) {
+            gap = 1;
+        }
+        bool done = true;
+        // for loop for that specific gap
+        for (int i = 0; i < vect.size()-gap; i++) {
+            // if out of order, switch them
+            if (vect.at(i) > vect.at(i+gap)) {
+                int temp = vect.at(i);
+                vect.at(i) = vect.at(i+gap);
+                vect.at(i+gap) = temp;
+                // condition to show that it is not sorted
+                done = false;
+            }
+        }
+        // condition that it is sorted when each one was checked (gap = 1), so leave while loop
+        if (done and gap == 1) {
+            break;
+        }
+    }
+    return vect;
+}
+int main() {
+    // first random vector test
+    vector<int> check1 = {3, 15, 4, 3, 2, 4, 14, 7, 10, 3, 20, 8, 4, 9, 5,};
+    // show unsorted vector
+    cout << "Initial Vector 1: ";
+    for (int i = 0; i < check1.size(); i++) {
+        if (i != check1.size()-1) {
+            cout << check1.at(i) << ", ";
+        }
+        else {
+            cout << check1.at(i) << endl;
+        }
+    }
+    // show sorted vector
+    vector<int> final1 = CombSort(check1);
+    cout << "Sorted Vector 1: ";
+    for (int i = 0; i < final1.size(); i++) {
+        if (i != final1.size()-1) {
+            cout << final1.at(i) << ", ";
+        }
+        else {
+            cout << final1.at(i) << endl;
+        }
+    }
+    // second random vector test
+    vector<int> check2 = {10, 164, 20, 50, 70, 90, 1, 90, 14, 530, 439,};
+    // show unsorted vector
+    cout << "Initial Vector 2: ";
+    for (int i = 0; i < check2.size(); i++) {
+        if (i != check2.size()-1) {
+            cout << check2.at(i) << ", ";
+        }
+        else {
+            cout << check2.at(i) << endl;
+        }
+    }
+    // show sorted vector
+    vector<int> final2 = CombSort(check2);
+    cout << "Sorted Vector 2: ";
+    for (int i = 0; i < final2.size(); i++) {
+        if (i != final2.size()-1) {
+            cout << final2.at(i) << ", ";
+        }
+        else {
+            cout << final2.at(i) << endl;
+        }
+    }
+    cout << endl;
+}