{"id":84,"date":"2026-09-15T16:06:27","date_gmt":"2026-09-15T08:06:27","guid":{"rendered":"https:\/\/decagrammaton.xyz\/?p=84"},"modified":"2026-09-17T16:10:05","modified_gmt":"2026-09-17T08:10:05","slug":"08-c%e8%af%ad%e8%a8%80%e6%8c%87%e9%92%88%e7%bb%ad1","status":"publish","type":"post","link":"https:\/\/decagrammaton.xyz\/?p=84","title":{"rendered":"08-C\u8bed\u8a00\u6307\u9488(\u7eed1)"},"content":{"rendered":"\n

\u63a5\u4e0a\u96c6\uff0c\u6211\u4eec\u7ee7\u7eed\u6307\u9488<\/p>\n\n\n\n

\n\n\n\n

2. \u6307\u9488\u4e0e\u6570\u7ec4<\/h1>\n\n\n\n

\u4e0a\u4e00\u8282\u6211\u4eec\u5b66\u4e60\u4e86\u6307\u9488\u7684\u57fa\u672c\u4f7f\u7528\u3002<\/p>\n\n\n\n

\u6211\u4eec\u77e5\u9053\uff1a<\/p>\n\n\n\n

<\/a>int<\/span> a =<\/span> 10<\/span>;<\/span><\/span>\n<\/a>int<\/span> *<\/span>p =<\/span> &<\/span>a;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
p<\/code> \u4fdd\u5b58\u7684\u662f a<\/code> \u7684\u5730\u5740\uff0c\u800c *p<\/code>\n\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u5730\u5740\u8bbf\u95ee a<\/code> \u4e2d\u7684\u6570\u636e\u3002<\/p>\n\n\n\n
\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u4e5f\u662f\u5b58\u653e\u5728\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4\u4e2d\u7684\uff0c\u56e0\u6b64\u6307\u9488\u4e5f\u53ef\u4ee5\u7528\u6765\u8bbf\u95ee\u548c\u904d\u5386\u6570\u7ec4\u3002<\/p>\n\n\n\n
\n\n\n\n
\u6570\u7ec4\u540d\u4e0e\u5730\u5740<\/h2>\n\n\n\n
\u5148\u770b\u4e00\u4e2a\u6570\u7ec4\uff1a<\/p>\n\n\n\n
<\/a>int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>,<\/span> 40<\/span>,<\/span> 50<\/span>};<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u4f1a\u8fde\u7eed\u5b58\u653e\uff1a<\/p>\n\n\n\n
\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502  10  \u2502  20  \u2502  30  \u2502  40  \u2502  50  \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n   \u2191       \u2191       \u2191       \u2191       \u2191\n a[0]    a[1]    a[2]    a[3]    a[4]<\/code><\/pre>\n\n\n\n
\u5728\u5927\u591a\u6570\u8868\u8fbe\u5f0f\u4e2d\uff0c\u6570\u7ec4\u540d a<\/code>\n\u4f1a\u8f6c\u6362\u6210\u6307\u5411\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u6307\u9488\u3002<\/p>\n\n\n\n
\u4e5f\u5c31\u662f\u8bf4\uff1a<\/p>\n\n\n\n
<\/a>a<\/span><\/code><\/pre><\/div>\n\n\n\n
\u53ef\u4ee5\u7406\u89e3\u4e3a\uff1a<\/p>\n\n\n\n
<\/a>&<\/span>a[<\/span>0<\/span>]<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
a\n\u2193\n\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740\n\u2193\n&a[0]<\/code><\/pre>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
<\/a>printf(<\/span>\"<\/span>%p\\n<\/span>\"<\/span>,<\/span> (<\/span>void<\/span> *)<\/span>a);<\/span><\/span>\n<\/a>printf(<\/span>\"<\/span>%p\\n<\/span>\"<\/span>,<\/span> (<\/span>void<\/span> *)&<\/span>a[<\/span>0<\/span>]);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u8fd9\u4e24\u4e2a\u5730\u5740\u7684\u6570\u503c\u901a\u5e38\u76f8\u540c\u3002<\/p>\n\n\n\n
\n\n\n\n
int *p = a<\/code><\/h2>\n\n\n\n
\u65e2\u7136 a<\/code>\n\u53ef\u4ee5\u8868\u793a\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u8ba9\u4e00\u4e2a\u6307\u9488\u4fdd\u5b58\u8fd9\u4e2a\u5730\u5740\uff1a<\/p>\n\n\n\n
<\/a>int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>,<\/span> 40<\/span>,<\/span> 50<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> *<\/span>p =<\/span> a;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4e5f\u53ef\u4ee5\u7406\u89e3\u6210\uff1a<\/p>\n\n\n\n
<\/a>int<\/span> *<\/span>p =<\/span> &<\/span>a[<\/span>0<\/span>];<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u6b64\u65f6\uff1a<\/p>\n\n\n\n
p\n\u2193\na[0]\n\u2193\n10<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
<\/a>printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *<\/span>p);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4f1a\u8f93\u51fa\uff1a<\/p>\n\n\n\n
10<\/code><\/pre>\n\n\n\n
\u56e0\u4e3a p<\/code> \u4fdd\u5b58\u7684\u662f a[0]<\/code> \u7684\u5730\u5740\uff0c\u800c\n*p<\/code> \u4f1a\u8bbf\u95ee\u8fd9\u4e2a\u5730\u5740\u4e2d\u7684\u6570\u636e\u3002<\/p>\n\n\n\n
\n\n\n\n
*p<\/code> \u8bbf\u95ee\u7b2c\u4e00\u4e2a\u5143\u7d20<\/h2>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
<\/a>#include <\/span><stdio.h><\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> main()<\/span> {<\/span><\/span>\n<\/a><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>,<\/span> 40<\/span>,<\/span> 50<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>    int<\/span> *<\/span>p =<\/span> a;<\/span><\/span>\n<\/a><\/span>\n<\/a>    printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *<\/span>p);<\/span><\/span>\n<\/a><\/span>\n<\/a>    return<\/span> 0<\/span>;<\/span><\/span>\n<\/a>}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
10<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\uff1a<\/p>\n\n\n\n
<\/a>*<\/span>p<\/span><\/code><\/pre><\/div>\n\n\n\n
\u5b9e\u9645\u4e0a\u8bbf\u95ee\u7684\u5c31\u662f\uff1a<\/p>\n\n\n\n
<\/a>a[<\/span>0<\/span>]<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
<\/a>*<\/span>p ==<\/span> a[<\/span>0<\/span>]<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u53ef\u4ee5\u7406\u89e3\u4e3a\uff1a<\/p>\n\n\n\n
p\n\u2193\na[0] \u7684\u5730\u5740\n\u2193\n*\n\u2193\na[0] \u7684\u6570\u636e\n\u2193\n10<\/code><\/pre>\n\n\n\n
\n\n\n\n
p++<\/code> \u8bbf\u95ee\u4e0b\u4e00\u4e2a\u5143\u7d20<\/h2>\n\n\n\n
\u524d\u9762\u6211\u4eec\u5b66\u4e60\u8fc7\uff1a<\/p>\n\n\n\n
<\/a>p++;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u6307\u9488\u5e76\u4e0d\u662f\u7b80\u5355\u5730\u8ba9\u5730\u5740\u589e\u52a0 1<\/code>\u3002<\/p>\n\n\n\n
\u6307\u9488\u4f1a\u6839\u636e\u81ea\u5df1\u7684\u7c7b\u578b\uff0c\u79fb\u52a8\u5bf9\u5e94\u7c7b\u578b\u7684\u5927\u5c0f\u3002<\/p>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
<\/a>int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>,<\/span> 40<\/span>,<\/span> 50<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> *<\/span>p =<\/span> a;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u5047\u8bbe\uff1a<\/p>\n\n\n\n
sizeof(int) = 4<\/code><\/pre>\n\n\n\n
\u90a3\u4e48\uff1a<\/p>\n\n\n\n
p\n\u2193\na[0]<\/code><\/pre>\n\n\n\n
\u6267\u884c\uff1a<\/p>\n\n\n\n
<\/a>p++;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4e4b\u540e\uff1a<\/p>\n\n\n\n
p\n\u2193\na[1]<\/code><\/pre>\n\n\n\n
\u518d\u6267\u884c\uff1a<\/p>\n\n\n\n
<\/a>p++;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4e4b\u540e\uff1a<\/p>\n\n\n\n
p\n\u2193\na[2]<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
<\/a>printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *<\/span>p);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u5c31\u53ef\u4ee5\u4f9d\u6b21\u8bbf\u95ee\uff1a<\/p>\n\n\n\n
10\n20\n30\n40\n50<\/code><\/pre>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
<\/a>#include <\/span><stdio.h><\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> main()<\/span> {<\/span><\/span>\n<\/a><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>,<\/span> 40<\/span>,<\/span> 50<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>    int<\/span> *<\/span>p =<\/span> a;<\/span><\/span>\n<\/a><\/span>\n<\/a>    printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *<\/span>p);<\/span><\/span>\n<\/a><\/span>\n<\/a>    p++;<\/span><\/span>\n<\/a>    printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *<\/span>p);<\/span><\/span>\n<\/a><\/span>\n<\/a>    p++;<\/span><\/span>\n<\/a>    printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *<\/span>p);<\/span><\/span>\n<\/a><\/span>\n<\/a>    p++;<\/span><\/span>\n<\/a>    printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *<\/span>p);<\/span><\/span>\n<\/a><\/span>\n<\/a>    p++;<\/span><\/span>\n<\/a>    printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *<\/span>p);<\/span><\/span>\n<\/a><\/span>\n<\/a>    return<\/span> 0<\/span>;<\/span><\/span>\n<\/a>}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
10\n20\n30\n40\n50<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
p\n\u2193\na[0]\n\np++\n\u2193\na[1]\n\np++\n\u2193\na[2]\n\np++\n\u2193\na[3]\n\np++\n\u2193\na[4]<\/code><\/pre>\n\n\n\n
\u8fd9\u5c31\u662f\u4f7f\u7528\u6307\u9488\u904d\u5386\u6570\u7ec4\u7684\u57fa\u7840\u3002<\/p>\n\n\n\n
\n\n\n\n
*(p + i)<\/code><\/h2>\n\n\n\n
\u9664\u4e86\u4f7f\u7528\uff1a<\/p>\n\n\n\n
<\/a>p++;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u9010\u4e2a\u79fb\u52a8\u6307\u9488\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u76f4\u63a5\u8ba9\u6307\u9488\u5411\u540e\u79fb\u52a8 i<\/code>\n\u4e2a\u5143\u7d20\uff1a<\/p>\n\n\n\n
<\/a>*(<\/span>p +<\/span> i)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
<\/a>int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>,<\/span> 40<\/span>,<\/span> 50<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> *<\/span>p =<\/span> a;<\/span><\/span>\n<\/a><\/span>\n<\/a>printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *(<\/span>p +<\/span> 0<\/span>));<\/span><\/span>\n<\/a>printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *(<\/span>p +<\/span> 1<\/span>));<\/span><\/span>\n<\/a>printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *(<\/span>p +<\/span> 2<\/span>));<\/span><\/span>\n<\/a>printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *(<\/span>p +<\/span> 3<\/span>));<\/span><\/span>\n<\/a>printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *(<\/span>p +<\/span> 4<\/span>));<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
10\n20\n30\n40\n50<\/code><\/pre>\n\n\n\n
\u53ef\u4ee5\u7406\u89e3\u4e3a\uff1a<\/p>\n\n\n\n
p\n\u2193\na[0]\n\np + 1\n\u2193\na[1]\n\np + 2\n\u2193\na[2]\n\np + 3\n\u2193\na[3]\n\np + 4\n\u2193\na[4]<\/code><\/pre>\n\n\n\n
\u6ce8\u610f\uff1a<\/p>\n\n\n\n
<\/a>p +<\/span> i<\/span><\/code><\/pre><\/div>\n\n\n\n
\u5f97\u5230\u7684\u662f\u5730\u5740<\/strong>\u3002<\/p>\n\n\n\n
\u800c\uff1a<\/p>\n\n\n\n
<\/a>*(<\/span>p +<\/span> i)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u624d\u662f\u901a\u8fc7\u8fd9\u4e2a\u5730\u5740\u8bbf\u95ee\u5bf9\u5e94\u7684\u6570\u636e\u3002<\/p>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
p + i\n\u2193\n\u7b2c i \u4e2a\u5143\u7d20\u7684\u5730\u5740\n\n*(p + i)\n\u2193\n\u7b2c i \u4e2a\u5143\u7d20\u7684\u6570\u636e<\/code><\/pre>\n\n\n\n
\n\n\n\n
a[i]<\/code> \u548c *(a + i)<\/code><\/h2>\n\n\n\n
\u8fd9\u662f C \u8bed\u8a00\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u4e00\u7ec4\u5173\u7cfb\uff1a<\/p>\n\n\n\n
<\/a>a[<\/span>i]<\/span> ==<\/span> *(<\/span>a +<\/span> i)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
<\/a>int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>,<\/span> 40<\/span>,<\/span> 50<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> a[<\/span>2<\/span>]);<\/span><\/span>\n<\/a>printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *(<\/span>a +<\/span> 2<\/span>));<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4e24\u6b21\u90fd\u4f1a\u8f93\u51fa\uff1a<\/p>\n\n\n\n
30<\/code><\/pre>\n\n\n\n
\u4e3a\u4ec0\u4e48\uff1f<\/p>\n\n\n\n
\u56e0\u4e3a\uff1a<\/p>\n\n\n\n
<\/a>a<\/span><\/code><\/pre><\/div>\n\n\n\n
\u53ef\u4ee5\u770b\u6210\u6307\u5411\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740\u3002<\/p>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
<\/a>a +<\/span> 2<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u5c31\u662f\u5411\u540e\u79fb\u52a8\u4e24\u4e2a\u5143\u7d20\uff1a<\/p>\n\n\n\n
a\n\u2193\na[0]\n\na + 1\n\u2193\na[1]\n\na + 2\n\u2193\na[2]<\/code><\/pre>\n\n\n\n
\u6b64\u65f6\uff1a<\/p>\n\n\n\n
<\/a>a +<\/span> 2<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u5f97\u5230\u7684\u662f a[2]<\/code> \u7684\u5730\u5740\u3002<\/p>\n\n\n\n
\u518d\u4f7f\u7528\uff1a<\/p>\n\n\n\n
<\/a>*<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u8fdb\u884c\u89e3\u5f15\u7528\uff1a<\/p>\n\n\n\n
<\/a>*(<\/span>a +<\/span> 2<\/span>)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u5c31\u53ef\u4ee5\u5f97\u5230 a[2]<\/code> \u4e2d\u7684\u6570\u636e\u3002<\/p>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
a[i]\n\n\u2193\n\n\u76f4\u63a5\u4f7f\u7528\u6570\u7ec4\u4e0b\u6807\u8bbf\u95ee\n\n\n*(a + i)\n\n\u2193\n\na\n\u2193\n\n\u5411\u540e\u79fb\u52a8 i \u4e2a\u5143\u7d20\n\n\u2193\n\n\u5f97\u5230\u7b2c i \u4e2a\u5143\u7d20\u7684\u5730\u5740\n\n\u2193\n\n*\n\n\u2193\n\n\u5f97\u5230\u7b2c i \u4e2a\u5143\u7d20\u7684\u6570\u636e<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
<\/a>a[<\/span>i]<\/span> ==<\/span> *(<\/span>a +<\/span> i)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\n\n\n\n
\u4e3a\u4ec0\u4e48 a + i<\/code>\n\u4e0d\u662f\u7b80\u5355\u5730\u52a0 i<\/code> \u4e2a\u5b57\u8282\uff1f<\/h2>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
<\/a>int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>,<\/span> 40<\/span>,<\/span> 50<\/span>};<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u5047\u8bbe\uff1a<\/p>\n\n\n\n
sizeof(int) = 4<\/code><\/pre>\n\n\n\n
\u5047\u8bbe a<\/code> \u7684\u8d77\u59cb\u5730\u5740\u4e3a\uff1a<\/p>\n\n\n\n
1000<\/code><\/pre>\n\n\n\n
\u90a3\u4e48\uff1a<\/p>\n\n\n\n
a + 0 \u2192 1000\na + 1 \u2192 1004\na + 2 \u2192 1008\na + 3 \u2192 1012\na + 4 \u2192 1016<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
<\/a>a +<\/span> i<\/span><\/code><\/pre><\/div>\n\n\n\n
\u5b9e\u9645\u4e0a\u662f\u79fb\u52a8 i<\/code> \u4e2a int<\/code> \u5143\u7d20\uff0c\u800c\u4e0d\u662f\u79fb\u52a8\ni<\/code> \u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n
\u53ef\u4ee5\u7406\u89e3\u4e3a\uff1a<\/p>\n\n\n\n
a + i\n\n= \u8d77\u59cb\u5730\u5740 + i \u00d7 sizeof(int)<\/code><\/pre>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
a + 2\n\n= 1000 + 2 \u00d7 4\n\n= 1008<\/code><\/pre>\n\n\n\n
1008 \u5c31\u662f a[2]<\/code> \u7684\u5730\u5740\u3002<\/p>\n\n\n\n
\n\n\n\n
\u7528\u6307\u9488\u904d\u5386\u6570\u7ec4<\/h2>\n\n\n\n
\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u77e5\u9053\uff1a<\/p>\n\n\n\n
<\/a>int<\/span> *<\/span>p =<\/span> a;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4ee5\u53ca\uff1a<\/p>\n\n\n\n
<\/a>*<\/span>p<\/span><\/code><\/pre><\/div>\n\n\n\n
\u548c\uff1a<\/p>\n\n\n\n
<\/a>p++<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u56e0\u6b64\u53ef\u4ee5\u4f7f\u7528\u6307\u9488\u904d\u5386\u6574\u4e2a\u6570\u7ec4\u3002<\/p>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
<\/a>#include <\/span><stdio.h><\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> main()<\/span> {<\/span><\/span>\n<\/a><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>,<\/span> 40<\/span>,<\/span> 50<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>    int<\/span> *<\/span>p =<\/span> a;<\/span><\/span>\n<\/a><\/span>\n<\/a>    for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> 5<\/span>;<\/span> i++)<\/span> {<\/span><\/span>\n<\/a><\/span>\n<\/a>        printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> *<\/span>p);<\/span><\/span>\n<\/a><\/span>\n<\/a>        p++;<\/span><\/span>\n<\/a>    }<\/span><\/span>\n<\/a><\/span>\n<\/a>    return<\/span> 0<\/span>;<\/span><\/span>\n<\/a>}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
10\n20\n30\n40\n50<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\uff1a<\/p>\n\n\n\n
<\/a>*<\/span>p<\/span><\/code><\/pre><\/div>\n\n\n\n
\u8d1f\u8d23\u8bbf\u95ee\u5f53\u524d\u5143\u7d20\u3002<\/p>\n\n\n\n
\u800c\uff1a<\/p>\n\n\n\n
<\/a>p++;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u8d1f\u8d23\u79fb\u52a8\u5230\u4e0b\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n
\u6574\u4e2a\u8fc7\u7a0b\u5c31\u662f\uff1a<\/p>\n\n\n\n
p\n\u2193\na[0]\n\u2193\n*p \u2192 10\n\np++\n\u2193\na[1]\n\u2193\n*p \u2192 20\n\np++\n\u2193\na[2]\n\u2193\n*p \u2192 30\n\np++\n\u2193\na[3]\n\u2193\n*p \u2192 40\n\np++\n\u2193\na[4]\n\u2193\n*p \u2192 50<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u603b\u7ed3<\/h2>\n\n\n\n
\u8fd9\u4e00\u8282\u6700\u91cd\u8981\u7684\u662f\u7406\u89e3\u4e0b\u9762\u51e0\u7ec4\u5173\u7cfb\uff1a<\/p>\n\n\n\n
<\/a>a<\/span><\/code><\/pre><\/div>\n\n\n\n
\u53ef\u4ee5\u7406\u89e3\u4e3a\u6307\u5411\u6570\u7ec4\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740\u3002<\/p>\n\n\n\n
<\/a>int<\/span> *<\/span>p =<\/span> a;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u8ba9\u6307\u9488 p<\/code> \u6307\u5411\u6570\u7ec4\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n
<\/a>*<\/span>p<\/span><\/code><\/pre><\/div>\n\n\n\n
\u8bbf\u95ee\u5f53\u524d\u6307\u9488\u6240\u6307\u5411\u7684\u5143\u7d20\u3002<\/p>\n\n\n\n
<\/a>p++<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u79fb\u52a8\u5230\u4e0b\u4e00\u4e2a\u6570\u7ec4\u5143\u7d20\u3002<\/p>\n\n\n\n
<\/a>p +<\/span> i<\/span><\/code><\/pre><\/div>\n\n\n\n
\u5f97\u5230\u5411\u540e\u79fb\u52a8 i<\/code> \u4e2a\u5143\u7d20\u540e\u7684\u5730\u5740\u3002<\/p>\n\n\n\n
<\/a>*(<\/span>p +<\/span> i)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u901a\u8fc7\u8fd9\u4e2a\u5730\u5740\u8bbf\u95ee\u7b2c i<\/code> \u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n
\u6700\u91cd\u8981\u7684\u4e00\u6761\uff1a<\/p>\n\n\n\n
<\/a>a[<\/span>i]<\/span> ==<\/span> *(<\/span>a +<\/span> i)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
\u6570\u7ec4\u4e0b\u6807\u8bbf\u95ee\uff1a\n\na[i]\n   \u2193\n\u7b2c i \u4e2a\u5143\u7d20\n\n\n\u6307\u9488\u8bbf\u95ee\uff1a\n\n*(a + i)\n   \u2193\n\u79fb\u52a8\u5230\u7b2c i \u4e2a\u5143\u7d20\n   \u2193\n\u901a\u8fc7\u5730\u5740\u8bbf\u95ee\u6570\u636e<\/code><\/pre>\n\n\n\n
\u8fd9\u6837\uff0c\u6570\u7ec4\u548c\u6307\u9488\u5c31\u8fde\u63a5\u8d77\u6765\u4e86\u3002<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a5\u4e0a\u96c6\uff0c\u6211\u4eec\u7ee7\u7eed\u6307\u9488 2. \u6307\u9488\u4e0e\u6570\u7ec4 \u4e0a\u4e00\u8282\u6211\u4eec\u5b66\u4e60\u4e86\u6307\u9488\u7684\u57fa\u672c\u4f7f\u7528\u3002 \u6211\u4eec\u77e5\u9053\uff1a int a = 10; int *p = & …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-84","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/posts\/84","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=84"}],"version-history":[{"count":2,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/posts\/84\/revisions"}],"predecessor-version":[{"id":86,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/posts\/84\/revisions\/86"}],"wp:attachment":[{"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=84"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=84"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=84"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}