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Jak-MS merged 1 commit into from
Mar 6, 2024
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Add example for C4066 #4974

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20 changes: 18 additions & 2 deletions docs/error-messages/compiler-warnings/compiler-warning-level-3-c4066.md
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---
description: "Learn more about: Compiler Warning (level 3) C4066"
title: "Compiler Warning (level 3) C4066"
ms.date: "11/04/2016"
ms.date: "03/06/2024"
f1_keywords: ["C4066"]
helpviewer_keywords: ["C4066"]
ms.assetid: f2ae6465-a140-459a-87fd-c8f25fafedd4
---
# Compiler Warning (level 3) C4066

characters beyond first in wide-character constant ignored

The compiler processes only the first character of a wide-character constant.

```cpp
// C4066.cpp
// compile with: /W3
#include <iostream>

int main()
{
wchar_t wc = L'AB'; // C4066

std::wcout << wc;
}
```

```output
A
```