Adding an example of querying in C++ README

README.md

@@ -96,6 +96,26 @@ realm.write([&car](){
 });
 ```
 
+## Construct a Simple Query
+
+Realm offers an expressive and intuitive way for querying data. Here's a simple example of querying for all `Person` objects and filtering the result based on age.
+
+```cpp
+int main() {
+  auto realm = realm::open<Person, Dog>({.path=path});
+  auto results = realm.objects<Person>().where("age > $0", {17});
+
+  for (const auto& person : results) {
+    std::string name = person.get_property<std::string>("name");
+    int age = person.get_property<int>("age");
+    std::string dogPurchasePower = (age >= 18) ? "can legally buy a dog in California" : "cannot legally buy a dog in California";
+    std::cout << "Customer " << name << " is " << age << " and " << dogPurchasePower << std::endl;
+  }
+
+  return 0;
+}
+```
+
 ## Building Realm
 
 In case you don't want to use the precompiled version, you can build Realm yourself from source.