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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head> <meta name="generator" content= "HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org"> <title>C/C++ Data Types</title> <link href="cppreference.css" rel="stylesheet" type="text/css"></head><body><table> <tr> <td> <div class="body-content"> <div class="header-box"> <a href="index.html">cppreference.com</a> > C/C++ Data Types </div> <h1>C/C++ Data Types</h1> <p>There are five data types for C: <strong>void</strong>, <strong>int</strong>, <strong>float</strong>, <strong>double</strong>, and <strong>char</strong>.</p> <table class="misc-table"> <tr class="misc-table-tr-1"> <th>Type</th> <th>Description</th> </tr> <tr class="misc-table-tr-2"> <td>void</td> <td>associated with no data type</td> </tr> <tr class="misc-table-tr-1"> <td>int</td> <td>integer</td> </tr> <tr class="misc-table-tr-2"> <td>float</td> <td>floating-point number</td> </tr> <tr class="misc-table-tr-1"> <td>double</td> <td>double precision floating-point number</td> </tr> <tr class="misc-table-tr-2"> <td>char</td> <td>character</td> </tr> </table><br> <br> <p>C++ defines two more: <strong>bool</strong> and <strong>wchar_t</strong>.</p> <table> <tr class="misc-table-tr-1"> <th>Type</th> <th>Description</th> </tr> <tr class="misc-table-tr-2"> <td>bool</td> <td>Boolean value, true or false</td> </tr> <tr class="misc-table-tr-1"> <td>wchar_t</td> <td>wide character</td> </tr> </table><br> <br> <h2>Type Modifiers</h2> <p>Several of these types can be modified using <strong>signed</strong>, <strong>unsigned</strong>, <strong>short</strong>, and <strong>long</strong>. When one of these type modifiers is used by itself, a data type of <strong>int</strong> is assumed. A complete list of possible data types follows:</p> <table> <tr class="misc-table-tr-2"> <td>bool</td> </tr> <tr class="misc-table-tr-1"> <td>char</td> </tr> <tr class="misc-table-tr-2"> <td>unsigned char</td> </tr> <tr class="misc-table-tr-1"> <td>signed char</td> </tr> <tr class="misc-table-tr-2"> <td>int</td> </tr> <tr class="misc-table-tr-1"> <td>unsigned int</td> </tr> <tr class="misc-table-tr-2"> <td>signed int</td> </tr> <tr class="misc-table-tr-1"> <td>short int</td> </tr> <tr class="misc-table-tr-2"> <td>unsigned short int</td> </tr> <tr class="misc-table-tr-1"> <td>signed short int</td> </tr> <tr class="misc-table-tr-2"> <td>long int</td> </tr> <tr class="misc-table-tr-1"> <td>signed long int</td> </tr> <tr class="misc-table-tr-2"> <td>unsigned long int</td> </tr> <tr class="misc-table-tr-1"> <td>float</td> </tr> <tr class="misc-table-tr-2"> <td>double</td> </tr> <tr class="misc-table-tr-1"> <td>long double</td> </tr> <tr class="misc-table-tr-2"> <td>wchar_t</td> </tr> </table> <h2>Type Sizes and Ranges</h2> <p>The size and range of any data type is compiler and architecture dependent. The "cfloat" (or "float.h") header file often defines minimum and maximum values for the various data types. You can use the <a href="keywords/sizeof.html">sizeof</a> operator to determine the size of any data type, in bytes. However, many architectures implement data types of a standard size. <strong>ints</strong> and <strong>floats</strong> are often 32-bit, <strong>chars</strong> 8-bit, and <strong>doubles</strong> are usually 64-bit. <strong>bools</strong> are often implemented as 8-bit data types.</p> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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