【c#】数据类型

水深无声 2022-06-13 13:39 176阅读 0赞

浮点类型

<table style="border-collapse:collapse; margin-left:0px; table-layout:fixed; width:97.73413897280967%"> 
 <tbody> 
  <tr> 
   <td style="border:1px solid rgb(211,211,211); padding:10px; margin:0px; width:24.88408037094281%"> 
    <div style="text-align:center">
      类型 
    </div> </td> 
   <td style="border:1px solid rgb(211,211,211); padding:10px; margin:0px; width:25.965996908809892%"> 
    <div style="text-align:center">
      最小值 
    </div> </td> 
   <td style="border:1px solid rgb(211,211,211); padding:10px; margin:0px; width:24.57496136012365%"> 
    <div style="text-align:center">
      最大值 
    </div> </td> 
   <td style="border:1px solid rgb(211,211,211); padding:10px; margin:0px; width:10.664605873261205%"> 
    <div style="text-align:center">
      有效位数 
    </div> </td> 
   <td style="border:1px solid rgb(211,211,211); padding:10px; margin:0px; width:13.75579598145286%"> 
    <div style="text-align:center">
      字节数 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      float 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      -3.4e38 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:6.25%"> 
    <div style="text-align:center">
      3.4e38 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:6.25%"> 
    <div style="text-align:center">
      7 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:12.5%"> 
    <div style="text-align:center">
      4 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      double 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      -1.7e308 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:6.25%"> 
    <div style="text-align:center">
      1.7e308 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:6.25%"> 
    <div style="text-align:center">
      15 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:12.5%"> 
    <div style="text-align:center">
      8 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      decimal 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      -7.9e28/(1e (0 - 28)) 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:6.25%"> 
    <div style="text-align:center">
      7.9e28/(1e (0 - 28)) 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:6.25%"> 
    <div style="text-align:center">
      28 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:12.5%"> 
    <div style="text-align:center">
      16 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

注意：decimal 是高精度类型，常用于银行账目计算

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1 字节 = 8 bit

整数类型

<table style="border-collapse:collapse; margin-left:0px; table-layout:fixed; width:45.16616314199396%"> 
 <tbody> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25.75250836120401%"> 
    <div style="text-align:center">
      类型 
    </div> </td> 
   <td style="border:1px solid rgb(211,211,211); padding:10px; margin:0px; width:34.78260869565217%"> 
    <div style="text-align:center">
      字节数 
    </div> </td> 
   <td style="border:1px solid rgb(211,211,211); padding:10px; margin:0px; width:39.130434782608695%"> 
    <div style="text-align:center">
      有无符号 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      sbyte 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      1 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      有 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      byte 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      1 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      无 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      short 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      2 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      有 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      ushort 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      2 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      无 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      int 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      4 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      有 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      uint 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      4 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      无 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      long 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      8 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      有 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      ulong 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:25%"> 
    <div style="text-align:center">
      8 
    </div> </td> 
   <td style="border-style:solid; border-width:1px; border-color:rgb(211,211,211); padding:10px; margin:0px; width:50%"> 
    <div style="text-align:center">
      无 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

注意：c\#中，char 型数据的范围和short相同，char也是2个字节，不同于c和c++

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