add: cpp-programming-ques 06_operator friend 16

Author: webwithaman

.vscode/settings.json

@@ -1,5 +1,6 @@
 {
   "files.associations": {
-    "ostream": "cpp"
+    "ostream": "cpp",
+    "iostream": "cpp"
   }
 }

06_operator_overloading_and_friend_function/16_logical_not_for_integer.cpp

@@ -0,0 +1,66 @@
+// // Header files
+#include <iostream>
+#include <conio.h>
+
+// // use namespace
+using namespace std;
+
+// // define class Integer
+class Integer
+{
+private:
+    // // instance memeber variable
+    int value;
+
+public:
+    // // Constructor
+    Integer()
+    {
+        value = 0;
+    }
+
+    Integer(int val)
+    {
+        value = val;
+    }
+
+    // // instance memebr function to get value
+    void setValue(int val)
+    {
+        value = val;
+    }
+
+    // // instance memebr function to get value
+    int getValue()
+    {
+        return value;
+    }
+
+    // overload logical NOT (!) operator
+    bool operator!()
+    {
+        return !value;
+    }
+};
+
+int main()
+{
+    int val;
+    cout << "\nEnter A Number => ";
+    cin >> val;
+
+    Integer num1(val); // create an object of Integer class
+
+    // //  Use the overloaded logical NOT operator
+    if (!num1)
+        cout << "\nThe Number is Zero." << endl;
+    else
+        cout << "\nThe Number is not Zero." << endl;
+
+    // // display the value
+    cout << "\nNumber => " << num1.getValue();
+
+    cout << endl; // Add new line
+    getch();
+    return 0;
+}