{"id":73,"date":"2026-09-01T15:40:20","date_gmt":"2026-09-01T07:40:20","guid":{"rendered":"https:\/\/decagrammaton.xyz\/?p=73"},"modified":"2026-09-17T15:41:06","modified_gmt":"2026-09-17T07:41:06","slug":"06-c%e8%af%ad%e8%a8%80%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/decagrammaton.xyz\/?p=73","title":{"rendered":"06-C\u8bed\u8a00\u6570\u7ec4"},"content":{"rendered":"\n

\u5148\u5b66\u51fd\u6570\u6765\u89c4\u8303\u4ee3\u7801\uff0c\u540e\u5b66\u6570\u7ec4\u63a5\u89e6\u6307\u9488<\/h2>\n\n\n\n

\u6570\u7ec4<\/h1>\n\n\n\n

\u76f8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u4e00\u4e2a\u96c6\u5408\u3002\u5728\u5185\u5b58\u4e2d\u662f\u6bb5\u8fde\u7eed\u7684\u7a7a\u95f4<\/p>\n\n\n\n

\u53ef\u4ee5\u7406\u89e3\u4e3a\u4ee3\u6807\u53f7\u7684 \u4ece0\u5f00\u59cb<\/strong> \u7684\u505c\u8f66\u4f4d<\/p>\n\n\n\n

\u4e00\u7ef4\u6570\u7ec4<\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u521b\u5efa\u6570\u7ec4<\/p>\n\n\n\n

<\/a>\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d[<\/span>\u6570\u503c]<\/span><\/span>\n<\/a>int<\/span> icu[<\/span>5<\/span>]<\/span>\/\/\u4ece0\u5f00\u59cb\uff0c\u4e00\u5171\u67095\u4e2a\u4f4d\u7f6e\u7684\u6574\u6570\u578b\u6570\u7ec4<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u521d\u59cb\u5316<\/p>\n\n\n\n
    \n
  1. \u5168\u9762\u521d\u59cb\u5316<\/li>\n<\/ol>\n\n\n\n
    <\/a>\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d[<\/span>\u6570\u503c]<\/span><\/span>\n<\/a>int<\/span> icu[<\/span>5<\/span>]={<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>,<\/span>4<\/span>,<\/span>5<\/span>}<\/span>\/\/\u4ece0\u5f00\u59cb\uff0c\u4e00\u5171\u67095\u4e2a\u4f4d\u7f6e\u7684\u6574\u6570\u578b\u6570\u7ec4<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
      \n
    1. \u5c40\u90e8\u521d\u59cb\u5316<\/li>\n<\/ol>\n\n\n\n
      <\/a>\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d[<\/span>\u6570\u503c]<\/span><\/span>\n<\/a>int<\/span> icu[<\/span>5<\/span>]={<\/span>1<\/span>,<\/span>2<\/span>}<\/span>\/\/\u53ea\u6709\u524d2\u4e2a\u6709\u6570\u5b57\u5176\u4ed6\u88650<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
        \n
      1. \u7701\u7565\u521d\u59cb\u5316<\/li>\n<\/ol>\n\n\n\n
        <\/a>\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d[<\/span>\u6570\u503c]<\/span><\/span>\n<\/a>int<\/span> icu[]={<\/span>1<\/span>,<\/span>2<\/span>}<\/span>\/\/\u4f1a\u81ea\u52a8\u6839\u636e\u5143\u7d20\u4e2a\u6570\u6765\u63a8\u5bfc\u957f\u5ea6<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \"\"<\/figure>\n\n\n\n
        \u904d\u5386\u6570\u7ec4<\/h2>\n\n\n\n
        \u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u6709\u81ea\u5df1\u7684\u4e0b\u6807\uff0c\u53ef\u4ee5\u4f7f\u7528 for<\/code>\n\u5faa\u73af\u4f9d\u6b21\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\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>\n<\/a>{<\/span><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>};<\/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>\n<\/a>    {<\/span><\/span>\n<\/a>        printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> a[<\/span>i]);<\/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
        \u8fd0\u884c\u540e\uff1a<\/p>\n\n\n\n
        1\n2\n3\n4\n5<\/code><\/pre>\n\n\n\n
        \u8fd9\u91cc\u7684 i<\/code> \u5c31\u662f\u6570\u7ec4\u7684\u4e0b\u6807\uff1a<\/p>\n\n\n\n
        i = 0 \u2192 a[0]\ni = 1 \u2192 a[1]\ni = 2 \u2192 a[2]\ni = 3 \u2192 a[3]\ni = 4 \u2192 a[4]<\/code><\/pre>\n\n\n\n
        \u6240\u4ee5\uff1a<\/p>\n\n\n\n
        <\/a>for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> 5<\/span>;<\/span> i++)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \u5c31\u53ef\u4ee5\u8ba9 i<\/code> \u4ece 0<\/code> \u53d8\u5316\u5230\n4<\/code>\uff0c\u521a\u597d\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002<\/p>\n\n\n\n
        \u4fee\u6539\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20<\/h3>\n\n\n\n
        \u56e0\u4e3a a[i]<\/code>\n\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u53d8\u91cf\u4f7f\u7528\uff0c\u6240\u4ee5\u4e0d\u4ec5\u53ef\u4ee5\u8bfb\u53d6\u5143\u7d20\uff0c\u4e5f\u53ef\u4ee5\u4fee\u6539\u5143\u7d20\u3002<\/p>\n\n\n\n
        \u4f8b\u5982\uff0c\u628a\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u4e58\u4ee5 2<\/code>\uff1a<\/p>\n\n\n\n
        <\/a>#include <\/span><stdio.h><\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> main()<\/span><\/span>\n<\/a>{<\/span><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>};<\/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>\n<\/a>    {<\/span><\/span>\n<\/a>        a[<\/span>i]<\/span> =<\/span> a[<\/span>i]<\/span> *<\/span> 2<\/span>;<\/span><\/span>\n<\/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>\n<\/a>    {<\/span><\/span>\n<\/a>        printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> a[<\/span>i]);<\/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
        \u7ed3\u679c\uff1a<\/p>\n\n\n\n
        2\n4\n6\n8\n10<\/code><\/pre>\n\n\n\n
        \u53ef\u4ee5\u7406\u89e3\u4e3a\uff1a<\/p>\n\n\n\n
        \u539f\u6570\u7ec4\uff1a\n\na[0] = 1\na[1] = 2\na[2] = 3\na[3] = 4\na[4] = 5\n\n        \u2193 for\u5faa\u73af\n\n\u4fee\u6539\uff1a\n\na[0] = 1 \u00d7 2\na[1] = 2 \u00d7 2\na[2] = 3 \u00d7 2\na[3] = 4 \u00d7 2\na[4] = 5 \u00d7 2\n\n        \u2193\n\n\u65b0\u6570\u7ec4\uff1a\n\n2  4  6  8  10<\/code><\/pre>\n\n\n\n
        \u603b\u7ed3\uff1a<\/h3>\n\n\n\n
        \u4f7f\u7528 a[i]<\/code> \u53ef\u4ee5\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u7b2c i<\/code> \u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n
        <\/a>a[<\/span>i]<\/span>       \/\/ \u8bfb\u53d6\u5143\u7d20<\/span><\/span>\n<\/a>a[<\/span>i]<\/span> =<\/span> 10<\/span>;<\/span> \/\/ \u4fee\u6539\u5143\u7d20<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \u914d\u5408 for<\/code>\n\u5faa\u73af\uff0c\u5c31\u53ef\u4ee5\u4f9d\u6b21\u8bfb\u53d6\u6216\u4fee\u6539\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002<\/p>\n\n\n\n
        \n
        \u6570\u7ec4\u4e0b\u6807\u4ece 0 \u5f00\u59cb\uff0c\u6240\u4ee5\u904d\u5386\u957f\u5ea6\u4e3a 5 \u7684\u6570\u7ec4\u65f6\uff0c\u6761\u4ef6\u5e94\u8be5\u662f i <\n5\uff0c\u800c\u4e0d\u662f i <= 5\u3002<\/p>\n<\/div>\n\n\n\n
        \u4f7f\u7528 %p<\/code>\n\u67e5\u770b\u6570\u7ec4\u5143\u7d20\u7684\u5730\u5740<\/h2>\n\n\n\n
        \u524d\u9762\u8bf4\u8fc7\uff0c\u6570\u7ec4\u5728\u5185\u5b58\u4e2d\u662f\u4e00\u6bb5 \u8fde\u7eed\u7684\u7a7a\u95f4<\/strong> \u3002<\/p>\n\n\n\n
        \u53ef\u4ee5\u4f7f\u7528 printf<\/code> \u7684 %p<\/code>\n\u6765\u67e5\u770b\u53d8\u91cf\u7684\u5730\u5740\u3002<\/p>\n\n\n\n
        <\/a>#include <\/span><stdio.h><\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> main()<\/span><\/span>\n<\/a>{<\/span><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>};<\/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>\n<\/a>    {<\/span><\/span>\n<\/a>        printf(<\/span>\"a[<\/span>%d<\/span>] \u7684\u5730\u5740\uff1a<\/span>%p\\n<\/span>\"<\/span>,<\/span> i,<\/span> (<\/span>void<\/span> *)&<\/span>a[<\/span>i]);<\/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
        \u8fd0\u884c\u540e\u53ef\u80fd\u5f97\u5230\uff1a<\/p>\n\n\n\n
        a[0] \u7684\u5730\u5740\uff1a0x7ffd12345020\na[1] \u7684\u5730\u5740\uff1a0x7ffd12345024\na[2] \u7684\u5730\u5740\uff1a0x7ffd12345028\na[3] \u7684\u5730\u5740\uff1a0x7ffd1234502c\na[4] \u7684\u5730\u5740\uff1a0x7ffd12345030<\/code><\/pre>\n\n\n\n
        \u53ef\u4ee5\u53d1\u73b0\uff0c\u6bcf\u4e2a\u5143\u7d20\u7684\u5730\u5740\u90fd\u662f\u8fde\u7eed\u7684\u3002<\/p>\n\n\n\n
        a[0] \u2192 0x...20\na[1] \u2192 0x...24\na[2] \u2192 0x...28\na[3] \u2192 0x...2c\na[4] \u2192 0x...30\n          \u2191\n       \u6bcf\u6b21 +4<\/code><\/pre>\n\n\n\n
        \u8fd9\u662f\u56e0\u4e3a\u8fd9\u91cc\u7684\u6570\u7ec4\u5143\u7d20\u7c7b\u578b\u662f int<\/code>\uff0c\u800c\u5728\u5e38\u89c1\u7684 C \u73af\u5883\u4e2d\nint<\/code> \u5360 4 \u5b57\u8282<\/strong>\u3002<\/p>\n\n\n\n
        \u56e0\u6b64\uff1a<\/p>\n\n\n\n
        a[0] \u5360\u7528 4 \u5b57\u8282\na[1] \u5360\u7528 4 \u5b57\u8282\na[2] \u5360\u7528 4 \u5b57\u8282\n...<\/code><\/pre>\n\n\n\n
        \u6240\u4ee5\u6570\u7ec4\u7684\u5143\u7d20\u4f1a\u4e00\u4e2a\u63a5\u4e00\u4e2a\u5730\u6392\u5217\u5728\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4\u4e2d\u3002<\/p>\n\n\n\n
        %p<\/code> \u662f\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n
        %p<\/code> \u662f printf<\/code>\n\u7528\u6765\u8f93\u51fa\u6307\u9488\uff08\u5730\u5740\uff09<\/strong>\u7684\u683c\u5f0f\u8bf4\u660e\u7b26\u3002<\/p>\n\n\n\n
        \u4f8b\u5982\uff1a<\/p>\n\n\n\n
        <\/a>int<\/span> a =<\/span> 10<\/span>;<\/span><\/span>\n<\/a><\/span>\n<\/a>printf(<\/span>\"<\/span>%p\\n<\/span>\"<\/span>,<\/span> (<\/span>void<\/span> *)&<\/span>a);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \u5176\u4e2d\uff1a<\/p>\n\n\n\n
        <\/a>&<\/span>a<\/span><\/code><\/pre><\/div>\n\n\n\n
        \u8868\u793a\u83b7\u53d6\u53d8\u91cf a<\/code> \u7684\u5730\u5740\u3002<\/p>\n\n\n\n
        \u56e0\u6b64\uff1a<\/p>\n\n\n\n
        <\/a>printf(<\/span>\"<\/span>%p\\n<\/span>\"<\/span>,<\/span> (<\/span>void<\/span> *)&<\/span>a);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \u5c31\u662f\u628a a<\/code> \u7684\u5730\u5740\u6253\u5370\u51fa\u6765\u3002<\/p>\n\n\n\n
        \u4e3a\u4ec0\u4e48\u4f7f\u7528 (void *)<\/code>\uff1f<\/h3>\n\n\n\n
        %p<\/code> \u5bf9\u5e94\u7684\u662f void *<\/code>\n\u7c7b\u578b\u7684\u6307\u9488\uff0c\u6240\u4ee5\u5199\u6210\uff1a<\/p>\n\n\n\n
        <\/a>printf(<\/span>\"<\/span>%p\\n<\/span>\"<\/span>,<\/span> (<\/span>void<\/span> *)&<\/span>a[<\/span>i]);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \u53ef\u4ee5\u660e\u786e\u5730\u5c06\u5730\u5740\u8f6c\u6362\u4e3a void *<\/code>\u3002<\/p>\n\n\n\n
        \u6ce8\u610f\uff1a<\/strong><\/p>\n\n\n\n
        \u6bcf\u6b21\u8fd0\u884c\u7a0b\u5e8f\u65f6\uff0c\u6570\u7ec4\u7684\u5177\u4f53\u5730\u5740\u53ef\u80fd\u4e0d\u540c\uff0c\u8fd9\u662f\u6b63\u5e38\u73b0\u8c61\u3002\u6211\u4eec\u4e3b\u8981\u89c2\u5bdf\u7684\u662f\u540c\u4e00\u4e2a\u6570\u7ec4\u4e2d\u5404\u5143\u7d20\u5730\u5740\u4e4b\u95f4\u7684\u5173\u7cfb<\/strong>\u3002<\/p>\n\n\n\n
        \u56e0\u6b64\uff0c\u901a\u8fc7 %p<\/code> \u53ef\u4ee5\u76f4\u89c2\u770b\u5230\uff1a<\/p>\n\n\n\n
        \n
        \u6570\u7ec4\u7684\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u662f\u8fde\u7eed\u5b58\u653e\u7684\u3002<\/strong><\/p>\n<\/blockquote>\n\n\n\n
        sizeof<\/h3>\n\n\n\n
        sizeof<\/code>\n\u53ef\u4ee5\u7528\u6765\u8ba1\u7b97\u4e00\u4e2a\u53d8\u91cf\u6216\u6570\u636e\u7c7b\u578b\u6240\u5360\u7528\u7684\u5b57\u8282\u6570<\/strong>\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>\n<\/a>{<\/span><\/span>\n<\/a>    int<\/span> a =<\/span> 10<\/span>;<\/span><\/span>\n<\/a><\/span>\n<\/a>    printf(<\/span>\"<\/span>%zu\\n<\/span>\"<\/span>,<\/span> sizeof<\/span>(<\/span>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
        \u5982\u679c\u5f53\u524d\u73af\u5883\u4e2d\u7684 int<\/code> \u5360 4 \u4e2a\u5b57\u8282\uff0c\u7ed3\u679c\u5c31\u662f\uff1a<\/p>\n\n\n\n
        4<\/code><\/pre>\n\n\n\n
        sizeof \u8ba1\u7b97\u6570\u7ec4\u5927\u5c0f<\/h3>\n\n\n\n
        sizeof<\/code> \u4e5f\u53ef\u4ee5\u7528\u6765\u8ba1\u7b97\u6574\u4e2a\u6570\u7ec4\u5360\u7528\u7684\u5b57\u8282\u6570\u3002<\/p>\n\n\n\n
        <\/a>#include <\/span><stdio.h><\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> main()<\/span><\/span>\n<\/a>{<\/span><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>    printf(<\/span>\"\u6570\u7ec4\u5927\u5c0f\uff1a<\/span>%zu<\/span> \u5b57\u8282<\/span>\\n<\/span>\"<\/span>,<\/span> sizeof<\/span>(<\/span>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
        \u5982\u679c\u4e00\u4e2a int<\/code> \u5360 4 \u5b57\u8282\uff0c\u90a3\u4e48\uff1a<\/p>\n\n\n\n
        5 \u4e2a\u5143\u7d20 \u00d7 4 \u5b57\u8282 = 20 \u5b57\u8282<\/code><\/pre>\n\n\n\n
        \u6240\u4ee5\uff1a<\/p>\n\n\n\n
        sizeof(a) = 20<\/code><\/pre>\n\n\n\n
        \u4f46\u662f\u6211\u4eec\u901a\u5e38\u66f4\u60f3\u77e5\u9053\uff1a<\/p>\n\n\n\n
        \n
        \u6570\u7ec4\u91cc\u9762\u6709\u591a\u5c11\u4e2a\u5143\u7d20\uff1f<\/strong><\/p>\n<\/blockquote>\n\n\n\n
        \u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n\n\n\n
        <\/a>sizeof<\/span>(<\/span>a)<\/span> \/<\/span> sizeof<\/span>(<\/span>a[<\/span>0<\/span>])<\/span><\/span><\/code><\/pre><\/div>\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>\n<\/a>{<\/span><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>    int<\/span> length =<\/span> sizeof<\/span>(<\/span>a)<\/span> \/<\/span> sizeof<\/span>(<\/span>a[<\/span>0<\/span>]);<\/span><\/span>\n<\/a><\/span>\n<\/a>    printf(<\/span>\"\u6570\u7ec4\u6709 <\/span>%d<\/span> \u4e2a\u5143\u7d20<\/span>\\n<\/span>\"<\/span>,<\/span> length);<\/span><\/span>\n<\/a><\/span>\n<\/a>    return<\/span> 0<\/span>;<\/span><\/span>\n<\/a>}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \u7ed3\u679c\uff1a<\/p>\n\n\n\n
        \u6570\u7ec4\u6709 5 \u4e2a\u5143\u7d20<\/code><\/pre>\n\n\n\n
        \u539f\u7406\u662f\uff1a<\/p>\n\n\n\n
        \u6574\u4e2a\u6570\u7ec4\u5927\u5c0f\n\u00f7\n\u4e00\u4e2a\u5143\u7d20\u5927\u5c0f\n=\n\u5143\u7d20\u6570\u91cf<\/code><\/pre>\n\n\n\n
        \u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n
        sizeof(a)       \u2192 \u6574\u4e2a\u6570\u7ec4\u7684\u5927\u5c0f\nsizeof(a[0])    \u2192 \u4e00\u4e2a\u5143\u7d20\u7684\u5927\u5c0f\n\nsizeof(a) \/ sizeof(a[0])\n        \u2193\n       \u5143\u7d20\u6570\u91cf<\/code><\/pre>\n\n\n\n
        \u914d\u5408 for \u904d\u5386\u6570\u7ec4<\/h3>\n\n\n\n
        \u8fd9\u6837\u5c31\u4e0d\u9700\u8981\u628a\u6570\u7ec4\u957f\u5ea6\u76f4\u63a5\u5199\u6b7b\uff1a<\/p>\n\n\n\n
        <\/a>#include <\/span><stdio.h><\/span><\/span>\n<\/a><\/span>\n<\/a>int<\/span> main()<\/span><\/span>\n<\/a>{<\/span><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>    int<\/span> length =<\/span> sizeof<\/span>(<\/span>a)<\/span> \/<\/span> sizeof<\/span>(<\/span>a[<\/span>0<\/span>]);<\/span><\/span>\n<\/a><\/span>\n<\/a>    for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> length;<\/span> i++)<\/span><\/span>\n<\/a>    {<\/span><\/span>\n<\/a>        printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> a[<\/span>i]);<\/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
        \u5982\u679c\u4ee5\u540e\u628a\u6570\u7ec4\u6539\u6210\uff1a<\/p>\n\n\n\n
        <\/a>int<\/span> a[<\/span>10<\/span>]<\/span> =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>,<\/span> 10<\/span>};<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        length<\/code> \u4e5f\u4f1a\u81ea\u52a8\u53d8\u6210 10<\/code>\u3002<\/p>\n\n\n\n
        \u8bb0\u4f4f\uff1a<\/strong><\/p>\n\n\n\n
        <\/a>sizeof<\/span>(<\/span>a)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \u5f97\u5230\u7684\u662f\u6570\u7ec4\u5360\u7528\u7684\u5b57\u8282\u6570<\/strong>\u3002<\/p>\n\n\n\n
        \u800c\uff1a<\/p>\n\n\n\n
        <\/a>sizeof<\/span>(<\/span>a)<\/span> \/<\/span> sizeof<\/span>(<\/span>a[<\/span>0<\/span>])<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \u5f97\u5230\u7684\u662f\u6570\u7ec4\u7684\u5143\u7d20\u6570\u91cf<\/strong>\u3002<\/p>\n\n\n\n
        \u6570\u7ec4\u8d8a\u754c<\/h2>\n\n\n\n
        \u524d\u9762\u8bf4\u8fc7\uff0c\u6570\u7ec4\u7684\u4e0b\u6807\u662f\u4ece 0<\/strong> \u5f00\u59cb\u7684\u3002<\/p>\n\n\n\n
        \u4f8b\u5982\uff1a<\/p>\n\n\n\n
        <\/a>int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>};<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \u5b83\u4e00\u5171\u6709 5 \u4e2a\u4f4d\u7f6e\uff1a<\/p>\n\n\n\n
        \u4e0b\u6807\uff1a    0      1      2      3      4\n        \u250c\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2510\n\u6570\u7ec4\uff1a  \u2502  1 \u2502  2 \u2502  3 \u2502  4 \u2502  5 \u2502\n        \u2514\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2518<\/code><\/pre>\n\n\n\n
        \u6240\u4ee5\u5b83\u7684\u5408\u6cd5\u4e0b\u6807\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
        0 ~ 4<\/code><\/pre>\n\n\n\n
        \u5982\u679c\u8bbf\u95ee\uff1a<\/p>\n\n\n\n
        a[5]<\/code><\/pre>\n\n\n\n
        \u5c31\u8d85\u51fa\u4e86\u6570\u7ec4\u7684\u8303\u56f4\u3002<\/p>\n\n\n\n
        \u8fd9\u5c31\u53eb\u505a\u6570\u7ec4\u8d8a\u754c<\/strong>\u3002<\/p>\n\n\n\n
        \u53ef\u4ee5\u628a\u6570\u7ec4\u60f3\u8c61\u6210\u4e00\u6392\u505c\u8f66\u4f4d\uff1a<\/p>\n\n\n\n
        \u505c\u8f66\u4f4d\uff1a\n  0      1      2      3      4\n\u250c\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2510\n\u2502 \ud83d\ude97 \u2502 \ud83d\ude97 \u2502 \ud83d\ude97 \u2502 \ud83d\ude97 \u2502 \ud83d\ude97 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2518\n                              \u2191\n                           \u6ca1\u6709 5 \u53f7\u8f66\u4f4d<\/code><\/pre>\n\n\n\n
        \u4f46\u662f C\n\u8bed\u8a00\u4e0d\u4f1a\u81ea\u52a8\u963b\u6b62\u4f60\u8bbf\u95ee\u8fd9\u4e2a\u4e0d\u5b58\u5728\u7684\u4f4d\u7f6e\u3002<\/strong><\/h3>\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>\n<\/a>{<\/span><\/span>\n<\/a>    int<\/span> a[<\/span>5<\/span>]<\/span> =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>};<\/span><\/span>\n<\/a><\/span>\n<\/a>    printf(<\/span>\"<\/span>%d\\n<\/span>\"<\/span>,<\/span> a[<\/span>5<\/span>]);<\/span><\/span>\n<\/a><\/span>\n<\/a>    return<\/span> 0<\/span>;<\/span><\/span>\n<\/a>}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        a[5]<\/code> \u5df2\u7ecf\u8d85\u51fa\u4e86\u6570\u7ec4\u8303\u56f4\u3002<\/p>\n\n\n\n
        \u6ce8\u610f\uff1a<\/strong><\/p>\n\n\n\n
        \u6570\u7ec4\u8d8a\u754c\u5c5e\u4e8e C \u8bed\u8a00\u4e2d\u7684\u672a\u5b9a\u4e49\u884c\u4e3a<\/strong>\u3002<\/p>\n\n\n\n
        \u7a0b\u5e8f\u53ef\u80fd\uff1a<\/p>\n\n\n\n