[Term Entry] C++ Queue: swap()

* add swap file to cpp terms

* add updated swap file to cpp terms

* correct terms and cleaned example

* add example section with output

* newline

* minor fixes

* Minor changes

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Author: frowningfrog

content/cpp/concepts/queues/terms/swap/swap.md

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+---
+Title: '.swap()'
+Description: 'Swaps the values of two queues.'
+Subjects:
+  - 'Computer Science'
+  - 'Game Development'
+Tags:
+  - 'Classes'
+  - 'Objects'
+  - 'OOP'
+CatalogContent:
+  - 'learn-c-plus-plus'
+  - 'paths/computer-science'
+---
+
+In C++, the **`.swap()`** function swaps the values of two queues. The queues must have the same [data type](https://www.codecademy.com/resources/docs/cpp/data-types), although size can differ.
+
+## Syntax
+
+The `.swap()` method can be used with the following syntax:
+
+```pseudo
+queue1.swap(queue2);
+```
+
+Or alternatively:
+
+```pseudo
+swap(queue1, queue2);
+```
+
+**Parameters:**
+
+- `queue2`: The other queue whose contents are to be swapped.
+
+**Return value:**
+
+`.swap()` does not return a value.
+
+## Example
+
+This example demonstrates the usage of the `.swap()` method with string queues:
+
+```cpp
+#include <iostream>
+#include <queue>
+using namespace std;
+
+int main() {
+  // Declare queues
+  queue<string> hello;
+  queue<string> world;
+
+  // Populate queues
+  hello.push("hello");
+  world.push("world");
+
+  // Swap the values of the queues
+  hello.swap(world);
+
+  // Print queue values
+  cout << hello.front() << " " << world.front();
+}
+```
+
+The expected output would be:
+
+```
+world hello
+```
+
+## Codebyte Example
+
+The following codebyte example below uses `.swap()` on two integer queues:
+
+```codebyte/cpp
+#include <iostream>
+#include <queue>
+using namespace std;
+
+int main() {
+  // Declare queues
+  queue<int> a;
+  queue<int> b;
+
+  // Populate queues
+  a.push(1);
+  a.push(2);
+  b.push(3);
+  b.push(4);
+
+  // Swap the values of a and b
+  a.swap(b);
+
+  // Print queue values
+  cout << "a: " << a.front() << ", " << a.back() << endl;
+  cout << "b: " << b.front() << ", " << b.back();
+}
+```