include search folder in cmake

search/linear_search.cpp

@@ -0,0 +1,39 @@
+#include <iostream>
+
+int LinearSearch(int *array, int size, int key) {
+    for (int i = 0; i < size; ++i) {
+        if (array[i] == key) {
+            return i;
+        }
+    }
+
+    return -1;
+}
+
+int main() {
+    int size;
+    std::cout << "\nEnter the size of the Array : ";
+    std::cin >> size;
+
+    int *array = new int[size];
+    int key;
+
+    // Input array
+    std::cout << "\nEnter the Array of " << size << " numbers : ";
+    for (int i = 0; i < size; i++) {
+        std::cin >> array[i];
+    }
+
+    std::cout << "\nEnter the number to be searched : ";
+    std::cin >> key;
+
+    int index = LinearSearch(array, size, key);
+    if (index != -1) {
+        std::cout << "\nNumber found at index : " << index;
+    } else {
+        std::cout << "\nNot found";
+    }
+
+    delete[] array;
+    return 0;
+}