{"id":3926,"date":"2014-02-06T02:59:39","date_gmt":"2014-02-05T17:59:39","guid":{"rendered":"http:\/\/www.vincentina.net\/?p=3926"},"modified":"2020-02-23T16:52:49","modified_gmt":"2020-02-23T07:52:49","slug":"math-h%e3%82%92%e3%82%a4%e3%83%b3%e3%82%af%e3%83%ab%e3%83%bc%e3%83%89%e3%81%97%e3%81%a6%e6%95%b0%e5%ad%a6%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e3%81%86%e5%a0%b4%e5%90%88%e3%81%abgcc%e3%81%a0%e3%81%91","status":"publish","type":"post","link":"https:\/\/www.vincentina.net\/?p=3926","title":{"rendered":"math.h\u3092\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u3057\u3066\u6570\u5b66\u95a2\u6570\u3092\u4f7f\u3046\u5834\u5408\u306bgcc\u3060\u3051\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u306a\u3044\u672c\u5f53\u306e\u7406\u7531\u306f\uff1f\uff1f"},"content":{"rendered":"<p>\u304b\u306a\u308a\u9577\u3044\u30bf\u30a4\u30c8\u30eb\u3067\u3059\u304c\u3001\u305d\u306e\u307e\u3093\u307e\u306e\u5185\u5bb9\u3067\u5f15\u3063\u304b\u304b\u3063\u3066\u308b\u3002<\/p>\n<p>\u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b0\u30e9\u30e0\u306fsqrt(x)\u3067for\u3067\u56de\u3057\u3066\u8a08\u7b97\u3057\u3066\u3044\u304f\u3082\u306e\u3067\u3059\u304c\u3001\u3053\u306e\u5f62\u5f0f\u3060\u3068gcc\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3068\u30b0\u30b0\u3063\u305f\u3089\u51fa\u3066\u304f\u308b\u7b54\u3048\u306e\u901a\u308a\u306b\u30aa\u30d7\u30b7\u30e7\u30f3 -lm \u3092\u3064\u3051\u306a\u3044\u3068\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre>[root@localhost program]# gcc k7-11.c\r\n\/tmp\/ccVAr5gE.o: In function `main':\r\nk7-11.c:(.text+0x4e): undefined reference to `sqrt'\r\ncollect2: ld \u306f\u30b9\u30c6\u30fc\u30bf\u30b9 1 \u3067\u7d42\u4e86\u3057\u307e\u3057\u305f<\/pre>\n<p>\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u3064\u3051\u3066\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u5f97\u3089\u308c\u308b\u7d50\u679c\u306f\u3053\u308c\u3002<\/p>\n<pre>[root@localhost program]# .\/a.out | head\r\n\u00a0 x\u00a0\u00a0 sqrt(x)\r\n-------------\r\n0.00\u00a0\u00a0\u00a0\u00a0\u00a0 0.000\r\n0.01\u00a0\u00a0\u00a0\u00a0\u00a0 0.100\r\n0.02\u00a0\u00a0\u00a0\u00a0\u00a0 0.141\r\n0.03\u00a0\u00a0\u00a0\u00a0\u00a0 0.173\r\n0.04\u00a0\u00a0\u00a0\u00a0\u00a0 0.200\r\n0.05\u00a0\u00a0\u00a0\u00a0\u00a0 0.224\r\n0.06\u00a0\u00a0\u00a0\u00a0\u00a0 0.245\r\n0.07\u00a0\u00a0\u00a0\u00a0\u00a0 0.265\r\n[root@localhost program]# .\/a.out | tail\r\n0.91\u00a0\u00a0\u00a0\u00a0\u00a0 0.954\r\n0.92\u00a0\u00a0\u00a0\u00a0\u00a0 0.959\r\n0.93\u00a0\u00a0\u00a0\u00a0\u00a0 0.964\r\n0.94\u00a0\u00a0\u00a0\u00a0\u00a0 0.970\r\n0.95\u00a0\u00a0\u00a0\u00a0\u00a0 0.975\r\n0.96\u00a0\u00a0\u00a0\u00a0\u00a0 0.980\r\n0.97\u00a0\u00a0\u00a0\u00a0\u00a0 0.985\r\n0.98\u00a0\u00a0\u00a0\u00a0\u00a0 0.990\r\n0.99\u00a0\u00a0\u00a0\u00a0\u00a0 0.995\r\n1.00\u00a0\u00a0\u00a0\u00a0\u00a0 1.000<\/pre>\n<p>\u3060\u304c\u3057\u304b\u3057\u3001\u30bd\u30fc\u30b9\u3092\u304b\u3048\u308b\u3068\u3001sqrt\u3092\u4f7f\u3063\u3066\u3044\u3066\u3082gcc\u3060\u3051\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u3061\u3083\u3063\u305f\u306e\u3060\u3002<\/p>\n<p>\u305d\u30fc\u3059<\/p>\n<pre>\u00a01 #include &lt;math.h&gt;\r\n\u00a0 2 #include &lt;stdio.h&gt;\r\n\u00a0 3\r\n\u00a0 4 int main(void)\r\n\u00a0 5 {\r\n\u00a0 6\u00a0\u00a0\u00a0\u00a0 int\u00a0\u00a0\u00a0\u00a0 i;\r\n\u00a0 7\u00a0\u00a0\u00a0\u00a0 double\u00a0 x;\r\n\u00a0 8\r\n\u00a0 9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(1 \/ 100.0));\r\n\u00a010\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(5 \/ 100.0));\r\n\u00a011\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(10 \/ 100.0));\r\n\u00a012\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(15 \/ 100.0));\r\n\u00a013\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(20 \/ 100.0));\r\n\u00a014\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(25 \/ 100.0));\r\n\u00a015\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(30 \/ 100.0));\r\n\u00a016\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(35 \/ 100.0));\r\n\u00a017\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(40 \/ 100.0));\r\n\u00a018\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(100 \/ 100.0));\r\n\u00a019 }<\/pre>\n<p>\u3051\u3063\u304b<\/p>\n<pre>[root@localhost program]# vim k7-11.c\r\n[root@localhost program]# gcc k7-11.c\r\n[root@localhost program]# .\/a.out\r\n0.100\r\n0.224\r\n0.316\r\n0.387\r\n0.447\r\n0.500\r\n0.548\r\n0.592\r\n0.632\r\n1.000<\/pre>\n<p>\u9055\u3044\u306e\u5206\u304b\u308b\u7537\u306b\u306f\u7c21\u5358\u306a\u306e\u304b\u3082\u3057\u308c\u306a\u3044\u3051\u3069\u3001\u3053\u3063\u3061\u304b\u3089\u3059\u308b\u3068<span style=\"font-size: x-large;\">sqrt\u4f7f\u3063\u3066\u308b\u306e\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u3066\u308b\u3058\u3083\u3093\uff01<\/span>\u307b\u3093\u3068\u306e\u7406\u7531\u306f\u306a\u3093\u306a\u306e\u3055\uff01\u3063\u3066\u601d\u3046\u3093\u3060\u3002<\/p>\n<p>sqrt\u3060\u3051\u3067\u306a\u304f\u3066\u3082sin\u3067\u3082cos\u3067\u3082\u540c\u3058\u304f\u3067\u304d\u308b\u3002\u3060\u3082\u3093\u3067\u3001\u6570\u5b66\u95a2\u6570\u3092\u4f7f\u3046\u3068\u304d\u306f\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u5c45\u308b\u3068\u3044\u3046\u56de\u7b54\u306f\u3061\u3087\u3063\u3068<span style=\"font-size: x-large;\">\u9055\u3046\u3093\u3067\u306a\u3044\u304b\u3044\uff1f<\/span>\u3068\u8a00\u3044\u305f\u3044\u3002<\/p>\n<pre>printf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(1 \/ 100.0));\r\nprintf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(5 \/ 100.0));\r\nprintf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(10 \/ 100.0));\r\nprintf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(15 \/ 100.0));\r\nprintf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(20 \/ 100.0));\r\nprintf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(100 \/ 100.0));\r\nprintf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sin(20.0 * 100.0));\r\nprintf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 cos(35.3 * 100.0));\r\nprintf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 tan(32.5 * 100.0));\r\nprintf(\"%5.3f\\n\",\u00a0\u00a0\u00a0 sqrt(100.0));<\/pre>\n<pre>[root@localhost program]# .\/a.out\r\n0.100\r\n0.224\r\n0.316\r\n0.387\r\n0.447\r\n1.000\r\n0.930\r\n0.408\r\n-44.636\r\n10.000<\/pre>\n<p>\u7b54\u3048\u306f\u8fd1\u3044\u306e\u304b\u9060\u3044\u306e\u304b\u5206\u304b\u3089\u306a\u3044\u3051\u3069\u3001\u305f\u3060\u3053\u3046\u3059\u308b\u3060\u3051\u3067\u30a8\u30e9\u30fc\u3068\u306a\u308b\u306e\u306d\u3002<\/p>\n<pre>\u00a0 1 #include &lt;math.h&gt;\r\n\u00a0 2 #include &lt;stdio.h&gt;\r\n\u00a0 3\r\n\u00a0 4 int main(void)\r\n\u00a0 5 {\r\n\u00a0 6\u00a0\u00a0\u00a0\u00a0 float\u00a0\u00a0 x=2;\r\n\u00a0 7\r\n\u00a0 8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.5f\\n\",\u00a0\u00a0\u00a0 sqrt(x));\r\n\u00a0 9 }\r\n\r\n<\/pre>\n<pre>\u00a0 1 #include &lt;math.h&gt;\r\n\u00a0 2 #include &lt;stdio.h&gt;\r\n\u00a0 3\r\n\u00a0 4 int main(void)\r\n\u00a0 5 {\r\n\u00a0 6\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(\"%5.5f\\n\",\u00a0\u00a0\u00a0 sqrt(2));\r\n\u00a0 7 }\r\n\r\n<\/pre>\n<p>\u898b\u305f\u76ee\u306f\u5168\u7136\u3061\u304c\u3093\u3060\u3051\u3069\uff01(\u7b11)<\/p>\n<p>\u7406\u7531\u304c\u5206\u304b\u3089\u306a\u3044\u3093\u3060<span style=\"font-size: large;\">\u3042\u3042<\/span><span style=\"font-size: x-large;\">\u3042\u3042\u3042\u3042\u3042\u3042\u3002<\/span><\/p>\n<p>\u3042\u3001\u3082\u3057\u304b\u3057\u3066sqrt(2)\u306e\u3068\u304d\u306fmath.h\u3092\u4f7f\u3063\u3066\u306a\u3044\u3068\u304b\uff1f<\/p>\n<p>\u3067\u3001\u8a66\u3057\u3066\u307f\u305f\u3002<\/p>\n<pre>[root@localhost program]# gcc k7-11.c\r\nk7-11.c: In function \u2018main\u2019:\r\nk7-11.c:5: \u8b66\u544a: incompatible implicit declaration of built-in function \u2018sqrt\u2019<\/pre>\n<p><span style=\"font-size: x-large;\">\u305d\u3046\u3058\u3083\u306a\u3044\u3089\u3057\u3044\u3002<\/span><\/p>\n<p>\u3046\u3080\u3080\u3080\u3001\u5207\u308a\u5206\u3051\u304c\u96e3\u3057\u3044\u306e\u3060\u3002<\/p>\n<p>\u5207\u308a\u5206\u3051\u3067\u3069\u3046\u306b\u304b\u306a\u308b\u554f\u984c\u304b\u3082\u602a\u3057\u3044\u306e\u3060\u304c\u3002<\/p>\n<div class='wp_social_bookmarking_light'>        <div class=\"wsbl_twitter\"><a href=\"https:\/\/twitter.com\/share\" class=\"twitter-share-button\" data-url=\"https:\/\/www.vincentina.net\/?p=3926\" data-text=\"math.h\u3092\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u3057\u3066\u6570\u5b66\u95a2\u6570\u3092\u4f7f\u3046\u5834\u5408\u306bgcc\u3060\u3051\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u306a\u3044\u672c\u5f53\u306e\u7406\u7531\u306f\uff1f\uff1f\" data-via=\"TakekenTw\" data-lang=\"ja\">Tweet<\/a><\/div><\/div>\n<br class='wp_social_bookmarking_light_clear' \/>\n","protected":false},"excerpt":{"rendered":"<p>\u304b\u306a\u308a\u9577\u3044\u30bf\u30a4\u30c8\u30eb\u3067\u3059\u304c\u3001\u305d\u306e\u307e\u3093\u307e\u306e\u5185\u5bb9\u3067\u5f15\u3063\u304b\u304b\u3063\u3066\u308b\u3002 \u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b0\u30e9\u30e0\u306fsqrt(x)\u3067for\u3067\u56de\u3057\u3066\u8a08\u7b97\u3057\u3066\u3044\u304f\u3082\u306e\u3067\u3059\u304c\u3001\u3053\u306e\u5f62\u5f0f\u3060\u3068gcc\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3068\u30b0\u30b0\u3063\u305f\u3089\u51fa\u3066\u304f\u308b\u7b54\u3048\u306e\u901a\u308a\u306b\u30aa\u30d7\u30b7\u30e7\u30f3 -lm &hellip; <a href=\"https:\/\/www.vincentina.net\/?p=3926\" class=\"more-link\"><span class=\"screen-reader-text\">&#8220;math.h\u3092\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u3057\u3066\u6570\u5b66\u95a2\u6570\u3092\u4f7f\u3046\u5834\u5408\u306bgcc\u3060\u3051\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u306a\u3044\u672c\u5f53\u306e\u7406\u7531\u306f\uff1f\uff1f&#8221; \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106],"tags":[],"class_list":["post-3926","post","type-post","status-publish","format-standard","hentry","category-programming"],"_links":{"self":[{"href":"https:\/\/www.vincentina.net\/index.php?rest_route=\/wp\/v2\/posts\/3926","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vincentina.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vincentina.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vincentina.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vincentina.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3926"}],"version-history":[{"count":0,"href":"https:\/\/www.vincentina.net\/index.php?rest_route=\/wp\/v2\/posts\/3926\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vincentina.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3926"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vincentina.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3926"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vincentina.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3926"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}