多维数组与指针——访问数组元素的指针表达式

青旅半醒 2022-08-20 11:26 192阅读 0赞

访问数组元素的方式很多，可以使用多种表达式访问数组元素，但是多样的表达式，很容易搞混淆了。

IVor Horton的名著《Beginning C》，第七章里面对表达式有一个表格非常好。

列下来，以备参考。

以三维数组为例

<table style="margin:auto 6.75pt; border:currentColor; border-collapse:collapse"> 
 <tbody> 
 <tr style="height:20.8pt"> 
 <td style="border-width:1pt 0px; border-style:solid none; border-color:rgb(75,172,198) rgb(0,0,0); padding:0cm 5.4pt; width:110.7pt; height:20.8pt; background-color:transparent"> board </td> 
 <td style="border-width:1pt 0px; border-style:solid none; border-color:rgb(75,172,198) rgb(0,0,0); padding:0cm 5.4pt; width:110.7pt; height:20.8pt; background-color:transparent"> 0 </td> 
 <td style="border-width:1pt 0px; border-style:solid none; border-color:rgb(75,172,198) rgb(0,0,0); padding:0cm 5.4pt; width:110.7pt; height:20.8pt; background-color:transparent"> 1 </td> 
 <td style="border-width:1pt 0px; border-style:solid none; border-color:rgb(75,172,198) rgb(0,0,0); padding:0cm 5.4pt; width:110.7pt; height:20.8pt; background-color:transparent"> 2 </td> 
 </tr> 
 <tr style=""> 
 <td style="background:rgb(210,234,241); padding:0cm 5.4pt; border:0px rgb(0,0,0); width:110.7pt"> 0 </td> 
 <td style="background:rgb(210,234,241); padding:0cm 5.4pt; border:0px rgb(0,0,0); width:110.7pt"> Board[0][0] *board[0] **board &nbsp; &nbsp; </td> 
 <td style="background:rgb(210,234,241); padding:0cm 5.4pt; border:0px rgb(0,0,0); width:110.7pt"> Board[0][1] *(board[0]+1) *(*board+1) </td> 
 <td style="background:rgb(210,234,241); padding:0cm 5.4pt; border:0px rgb(0,0,0); width:110.7pt"> Board[0][2] *(board[0]+2) *(*board+2) </td> 
 </tr> 
 <tr style=""> 
 <td style="padding:0cm 5.4pt; border:0px rgb(0,0,0); width:110.7pt; background-color:transparent"> 1 </td> 
 <td style="padding:0cm 5.4pt; border:0px rgb(0,0,0); width:110.7pt; background-color:transparent"> Board[1][0] *(board[1]) *(*board+3) &nbsp; *(board[0]+3) &nbsp; &nbsp; </td> 
 <td style="padding:0cm 5.4pt; border:0px rgb(0,0,0); width:110.7pt; background-color:transparent"> Board[1][1] *(board[1]+1) *(*board+4) &nbsp; *(board[0]+4) &nbsp; </td> 
 <td style="padding:0cm 5.4pt; border:0px rgb(0,0,0); width:110.7pt; background-color:transparent"> Board[1][2] *(board[1]+2) *(*board+5) &nbsp; *(board[0]+5) &nbsp; </td> 
 </tr> 
 <tr style=""> 
 <td style="background:rgb(210,234,241); border-width:0px 0px 1pt; border-style:none none solid; border-color:rgb(0,0,0) rgb(0,0,0) rgb(75,172,198); padding:0cm 5.4pt; width:110.7pt"> 2 </td> 
 <td style="background:rgb(210,234,241); border-width:0px 0px 1pt; border-style:none none solid; border-color:rgb(0,0,0) rgb(0,0,0) rgb(75,172,198); padding:0cm 5.4pt; width:110.7pt"> Board[2][0] *(board[2]) *(*board+6) &nbsp; *(board[0]+6) *(board[1]+3) </td> 
 <td style="background:rgb(210,234,241); border-width:0px 0px 1pt; border-style:none none solid; border-color:rgb(0,0,0) rgb(0,0,0) rgb(75,172,198); padding:0cm 5.4pt; width:110.7pt"> Board[2][1] *(board[2]+1) *(*board+7) &nbsp; *(board[0]+7) *(board[1]+4) &nbsp; &nbsp; </td> 
 <td style="background:rgb(210,234,241); border-width:0px 0px 1pt; border-style:none none solid; border-color:rgb(0,0,0) rgb(0,0,0) rgb(75,172,198); padding:0cm 5.4pt; width:110.7pt"> Board[2][2] *(board[2]+2) *(*board+8) &nbsp; *(board[0]+8) *(board[1]+5) &nbsp; &nbsp; &nbsp; </td> 
 </tr> 
 </tbody> 
</table>