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Merged
merged 4 commits into from
Dec 13, 2022
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Add examples for void type in cpp (#4331) #4332

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4c8bce0
Add examples for void type in cpp (#4331)
AdrianWeaver Dec 7, 2022
9a27d85
Update void.cpp with recommended changes
colin-home Dec 12, 2022
f5c6d85
Undo update.
colin-home Dec 12, 2022
ad70cb1
Re-apply edits for style.
colin-home Dec 13, 2022
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16 changes: 13 additions & 3 deletions docs/cpp/void-cpp.md
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@@ -1,7 +1,7 @@
---
description: "Learn more about: void (C++)"
title: "void (C++)"
ms.date: 10/15/2021
ms.date: 12/13/2022
f1_keywords: ["void_cpp"]
helpviewer_keywords: ["void keyword [C++]", "functions [C++], void", "pointers, void"]
ms.assetid: d203edba-38e6-4056-8b89-011437351057
Expand All @@ -16,16 +16,26 @@ In C++, a **`void`** pointer can point to a free function (a function that's not

You can't declare a variable of type **`void`**.

As a matter of style, the C++ Core Guidelines recommend you don't use **`void`** to specify an empty formal parameter list. For more information, see [C++ Core Guidelines NL.25: Don't use `void` as an argument type](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#nl25-dont-use-void-as-an-argument-type).

## Example

```cpp
// void.cpp

void return_nothing()
{
// A void function can have a return with no argument,
// or no return statement.
}

void vobject; // C2182
void *pv; // okay
int *pint; int i;
int main() {
int main()
{
pv = &i;
// Cast optional in C required in C++
// Cast is optional in C, required in C++
pint = (int *)pv;
}
```
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