16/32/64位平台下char、short、int、long、指针等数据类型分别占多少字节，操作系统可以使用的最大内存空间为多大？

水深无声 2022-04-12 02:29 197阅读 0赞

<table> 
 <thead> 
  <tr> 
   <th> <h3>数据类型</h3> </th> 
   <th> <h3>16位平台</h3> </th> 
   <th> <h3>32位平台</h3> </th> 
   <th> <h3>64位平台</h3> </th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <th> <h3>char</h3> </th> 
   <td> <h3>1(个字节)</h3> </td> 
   <td> <h3>1</h3> </td> 
   <td> <h3>1</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>short</h3> </th> 
   <td> <h3>2</h3> </td> 
   <td> <h3>2</h3> </td> 
   <td> <h3>2</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>int</h3> </th> 
   <td> <h3>2</h3> </td> 
   <td> <h3>4</h3> </td> 
   <td> <h3>4</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>unsigned int</h3> </th> 
   <td> <h3>2</h3> </td> 
   <td> <h3>4</h3> </td> 
   <td> <h3>4</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>float</h3> </th> 
   <td> <h3>4</h3> </td> 
   <td> <h3>4</h3> </td> 
   <td> <h3>4</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>double</h3> </th> 
   <td> <h3>8</h3> </td> 
   <td> <h3>8</h3> </td> 
   <td> <h3>8</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>long</h3> </th> 
   <td> <h3>4</h3> </td> 
   <td> <h3>4</h3> </td> 
   <td> <h3>8</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>&nbsp;long long</h3> </th> 
   <td> <h3>8</h3> </td> 
   <td> <h3>8</h3> </td> 
   <td> <h3>8</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>unsigned long</h3> </th> 
   <td> <h3>4</h3> </td> 
   <td> <h3>4</h3> </td> 
   <td> <h3>8</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>指针</h3> </th> 
   <td> <h3>2</h3> </td> 
   <td> <h3>4</h3> </td> 
   <td> <h3>8</h3> </td> 
  </tr> 
  <tr> 
   <th> <h3>最大存储空间</h3> </th> 
   <td> <h3>2^16</h3> </td> 
   <td> <h3>2^32</h3> </td> 
   <td> <h3>2^64</h3> </td> 
  </tr> 
 </tbody> 
</table>