{"id":10272,"date":"2026-06-18T08:30:00","date_gmt":"2026-06-17T23:30:00","guid":{"rendered":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/?page_id=10272"},"modified":"2026-06-13T18:24:06","modified_gmt":"2026-06-13T09:24:06","slug":"ex1007a","status":"publish","type":"page","link":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/lecture\/prog\/exercise-advance\/ex10\/ex1007a\/","title":{"rendered":"\u8ab2\u984c [10] \u30dd\u30a4\u30f3\u30bf\u2460\uff087\/9\uff09"},"content":{"rendered":"<div class=\"breadcrumbs align wp-block-bcn-breadcrumb-trail has-text-color has-background\" vocab=\"https:\/\/schema.org\/\" typeof=\"BreadcrumbList\">\n\t<span><\/span>\n\t<span property=\"itemListElement\" typeof=\"ListItem\"><a property=\"item\" typeof=\"WebPage\" title=\"Go to \u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u5de5\u5b66\u7814\u7a76\u5ba4.\" href=\"https:\/\/se.cite.ehime-u.ac.jp\/jp\" class=\"home\" aria-current=\"page\"><span property=\"name\">\u30db\u30fc\u30e0<\/span><\/a><meta property=\"position\" content=\"1\"><\/span><\/div>\n\n\n\n<h4 class=\"wp-block-heading has-background\" style=\"background-color:#d3f28c\"><strong>\u554f 7<\/strong>\uff08\u63d0\u51fa\u30d7\u30ed\u30b0\u30e9\u30e0\u540d\uff1aex1007a.c\uff09<\/h4>\n\n\n\n<p class=\"problem wp-block-paragraph\"><a href=\"http:\/\/se.cite.ehime-u.ac.jp\/lecture\/prog\/material\/ex1007a.c\" target=\"_blank\" rel=\"noreferrer noopener\">\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\uff08ex1007a.c\uff09<\/a>\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\uff0c\u305d\u306e\u4e2d\u306e<strong><span class=\"tadv-color\" style=\"color:#0000ff\">\u95a2\u6570 <kbd>to_prime<\/kbd> \u3092\u5b8c\u6210\u3055\u305b\u306a\u3055\u3044<\/span><\/strong>\uff0e<br><br>\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\uff0c\u5165\u529b\u3068\u3057\u3066\u4e0e\u3048\u3089\u308c\u305f\u6574\u6570\u3092 int \u578b\u5909\u6570 <kbd>x<\/kbd> \u306b\u683c\u7d0d\u3057\u305f\u5f8c\uff0c<br>\u305d\u306e\u5909\u6570\u306e\u5024\u3092<strong><span class=\"tadv-color\" style=\"color:#ff0000\"> x \u4ee5\u4e0a\u306e\u7d20\u6570\u306e\u4e2d\u3067\u6700\u5c0f\u306e\u3082\u306e\u3078\u66f8\u304d\u63db\u3048<\/span><\/strong>\u3066\u51fa\u529b\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u308b\uff0e<br>\u95a2\u6570 <kbd>to_prime<\/kbd> \u306f\u305d\u306e\u66f8\u304d\u63db\u3048\u3092\u62c5\u5f53\u3059\u308b\u95a2\u6570\u3067\u3042\u308b\uff0e<br>\u306a\u304a\uff0cex1007a.c \u306e\u4e2d\u3067\u306f\u3042\u3089\u304b\u3058\u3081\u7d20\u6570\u5224\u5b9a\u306e\u305f\u3081\u306e <kbd>is_prime<\/kbd> \u304c\u7528\u610f\u3057\u3066\u3042\u308b\uff0e<br>\u3053\u3053\u3067\u306f\uff0c<kbd>x<\/kbd> \u306f 2 \u4ee5\u4e0a\u306e\u6574\u6570\u3068\u4eee\u5b9a\u3057\u3066\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u3063\u3066\u826f\u3044\u3082\u306e\u3068\u3059\u308b\uff0e<br><br>\u3053\u306e\u554f\u984c\u3067\u306f<span class=\"tadv-background-color\" style=\"background-color:#ffeb00\"><strong>\u95a2\u6570 <kbd>main<\/kbd> \u3068\u95a2\u6570 <kbd>is_prime<\/kbd> \u306e\u5185\u5bb9\u306f\u4e00\u5207\u66f8\u304d\u63db\u3048\u306a\u3044<\/strong><\/span>\u3053\u3068\uff0e <br><br><strong>\u3010\u6ce8\u610f\u3011<\/strong><br>\u95a2\u6570 <kbd>to_prime<\/kbd> \u306f<strong><span class=\"tadv-color\" style=\"color:#0000ff\">\u623b\u308a\u5024\u3092\u6301\u305f\u306a\u3044\u306e\u3067\u623b\u308a\u5024\u578b\u306f void<\/span><\/strong> \u3068\u5ba3\u8a00\u3057\u3066\u3042\u308b\uff0e<br>\u3053\u308c\u3092\u5909\u66f4\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3057\uff0c\u623b\u308a\u5024\u3092\u6301\u305f\u305b\u3066\u3082\uff08return \u3092\u66f8\u3044\u3066\u3082\uff09\u3044\u3051\u307e\u305b\u3093\uff0e<\/p>\n\n\n\n<p class=\"hint wp-block-paragraph\"><strong>\u3010\u30d2\u30f3\u30c8\u3011<\/strong><br>\u300c<strong>x \u304c\u7d20\u6570\u3067\u306a\u3044<\/strong>\u300d<strong>\u9650\u308a<\/strong>\uff0c x \u306e\u5024\u3092 1 \u5897\u3084\u3059\u3068\u3044\u3046<strong>\u7e70\u308a\u8fd4\u3057<\/strong>\u3092\u884c\u3046\u3068\u3088\u3044\u3067\u3059\uff0e<br>\u3053\u3053\u3067\u300c<kbd>x<\/kbd> \u304c\u7d20\u6570\u3067\u306a\u3044\u300d\u3068\u3044\u3046\u6761\u4ef6\u306f\u300c <kbd><strong><span class=\"tadv-color\" style=\"color:#ff0000\">!<\/span><\/strong>is_prime(x)<\/kbd> \u300d\u3068\u66f8\u304f\u3060\u3051\u3067\u3088\u3044\u3067\u3059\uff0e<br>\u8a18\u53f7 <kbd><strong><span class=\"tadv-color\" style=\"color:#ff0000\">!<\/span><\/strong><\/kbd> \u304c\u6761\u4ef6\u306e<strong>\u5426\u5b9a<\/strong>\u3092\u610f\u5473\u3057\u307e\u3059\uff0e<br>\uff08\u6ce8\uff1a\u5b9f\u969b\u306b\u306f <strong><span class=\"tadv-color\" style=\"color:#0000ff\"><kbd>x<\/kbd> \u3068\u76f4\u63a5\u66f8\u304f\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u306e\u3067\u30dd\u30a4\u30f3\u30bf\u3092\u4f7f\u3046<\/span><\/strong>\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff09<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u3010\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u7d50\u679c\u3011\uff08\u305d\u306e\uff11\uff09<\/strong>\u203b<span style=\"color:#ff0000\" class=\"has-inline-color\">\u8d64\u5b57<\/span>\u306f\u5b9f\u884c\u6642\u306b\u30ad\u30fc\u30dc\u30fc\u30c9\u304b\u3089\u5165\u529b\u3059\u308b\u5185\u5bb9<\/li>\n<\/ul>\n\n\n\n<pre class=\"example\" style=\"width: 320px; margin-top: -15pt; margin-bottom: 10px\">2 \u4ee5\u4e0a\u306e\u6574\u6570\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<span style=\"color:#ff0000\" class=\"has-inline-color\">9<\/span>\n9 \u4ee5\u4e0a\u306e\u6700\u5c0f\u306e\u7d20\u6570\u306f 11 \u3067\u3059\uff0e<span style=\"color:#00aa00\">\u23ce<\/span>\n\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u3010\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u7d50\u679c\u3011\uff08\u305d\u306e\uff12\uff09<\/strong>\u203b<span style=\"color:#ff0000\" class=\"has-inline-color\">\u8d64\u5b57<\/span>\u306f\u5b9f\u884c\u6642\u306b\u30ad\u30fc\u30dc\u30fc\u30c9\u304b\u3089\u5165\u529b\u3059\u308b\u5185\u5bb9<\/li>\n<\/ul>\n\n\n\n<pre class=\"example\" style=\"width: 320px; margin-top: -15pt; margin-bottom: 10px\">2 \u4ee5\u4e0a\u306e\u6574\u6570\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<span style=\"color:#ff0000\" class=\"has-inline-color\">2<\/span>\n2 \u4ee5\u4e0a\u306e\u6700\u5c0f\u306e\u7d20\u6570\u306f 2 \u3067\u3059\uff0e<span style=\"color:#00aa00\">\u23ce<\/span>\n\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u3010\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u7d50\u679c\u3011\uff08\u305d\u306e\uff13\uff09<\/strong>\u203b<span style=\"color:#ff0000\" class=\"has-inline-color\">\u8d64\u5b57<\/span>\u306f\u5b9f\u884c\u6642\u306b\u30ad\u30fc\u30dc\u30fc\u30c9\u304b\u3089\u5165\u529b\u3059\u308b\u5185\u5bb9<\/li>\n<\/ul>\n\n\n\n<pre class=\"example\" style=\"width: 320px; margin-top: -15pt; margin-bottom: 10px\">2 \u4ee5\u4e0a\u306e\u6574\u6570\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<span style=\"color:#ff0000\" class=\"has-inline-color\">101<\/span>\n101 \u4ee5\u4e0a\u306e\u6700\u5c0f\u306e\u7d20\u6570\u306f 101 \u3067\u3059\uff0e<span style=\"color:#00aa00\">\u23ce<\/span>\n\n<\/pre>\n\n\n\n<p class=\"miss wp-block-paragraph\"><strong>\u3010\u904e\u53bb\u306b\u3042\u3063\u305f\u30df\u30b9\uff08\u5b9f\u969b\u306b\u6e1b\u70b9\u3068\u306a\u308a\uff0c\u3084\u308a\u76f4\u3057\u3092\u547d\u3058\u3089\u308c\u305f\u4f8b\uff09\u3011<\/strong><br> \u25a0 <strong>\u5b9f\u884c\u306e<span class=\"tadv-color\" style=\"color:#ff0000\">\u753b\u9762\u51fa\u529b\u304c\u4e0a\u306e\u4f8b\u3068\u9055\u3046<\/span><\/strong>\uff08<strong><span class=\"tadv-color\" style=\"color:#0000ff\">\u304d\u3061\u3093\u3068\u78ba\u8a8d\u3057\u3066\u3044\u306a\u3044<\/span><\/strong>\uff09\uff0e<br> \u25a0 <strong><span class=\"tadv-color\" style=\"color:#0000ff\">main \u95a2\u6570\u3092\u66f8\u304d\u63db\u3048\u3066<\/span><\/strong>\u3057\u307e\u3063\u3066\u3044\u308b\uff0e<br> \u25a0 <strong><span class=\"tadv-color\" style=\"color:#0000ff\">\u30a4\u30f3\u30c7\u30f3\u30c8\u306b\u4e0d\u5099<\/span><\/strong>\u304c\u3042\u308b\uff08<a href=\"https:\/\/se.cite.ehime-u.ac.jp\/jp\/lecture\/prog\/vscode-%e4%b8%8a%e3%81%a7%e3%82%a4%e3%83%b3%e3%83%87%e3%83%b3%e3%83%88%e3%82%92%e8%87%aa%e5%8b%95%e3%81%a7%e6%8f%83%e3%81%88%e3%82%8b%e6%96%b9%e6%b3%95\/\" target=\"_blank\" rel=\"noreferrer noopener\">VSCode \u4e0a\u3067\u30a4\u30f3\u30c7\u30f3\u30c8\u3092\u81ea\u52d5\u3067\u63c3\u3048\u308b\u4f5c\u696d<\/a>\u3092\u3084\u3063\u3066\u3044\u306a\u3044\uff09<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-very-dark-gray-color has-css-opacity has-very-dark-gray-background-color has-background is-style-wide\"\/>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<p class=\"wp-block-paragraph\">\u2190 [ <a href=\"https:\/\/se.cite.ehime-u.ac.jp\/jp\/lecture\/prog\/exercise-advance\/ex10\/ex1006a\/\">\u554f 6 (ex1006a.c)<\/a> ]<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p class=\"has-text-align-right wp-block-paragraph\"><strong>\u30df\u30b9\u304c\u7121\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u305f\u3089<\/strong>\u6b21\u306e\u554f\u984c\u3078 \u2192 [<a href=\"https:\/\/se.cite.ehime-u.ac.jp\/jp\/lecture\/prog\/exercise-advance\/ex10\/ex1008a\/\"> \u554f 8 (ex1008a.c)<\/a> ]<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u554f 7\uff08\u63d0\u51fa\u30d7\u30ed\u30b0\u30e9\u30e0\u540d\uff1aex1007a.c\uff09 \u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\uff08ex1007a.c\uff09\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\uff0c\u305d\u306e\u4e2d\u306e\u95a2\u6570 to_prime \u3092\u5b8c\u6210\u3055\u305b\u306a\u3055\u3044\uff0e \u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\uff0c\u5165\u529b\u3068\u3057\u3066\u4e0e\u3048\u3089\u308c\u305f\u6574\u6570\u3092 int \u578b\u5909\u6570 x  <a class=\"more-link\" href=\"https:\/\/se.cite.ehime-u.ac.jp\/jp\/lecture\/prog\/exercise-advance\/ex10\/ex1007a\/\">&#8230; more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":10232,"menu_order":6,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-10272","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/wp-json\/wp\/v2\/pages\/10272","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/wp-json\/wp\/v2\/comments?post=10272"}],"version-history":[{"count":3,"href":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/wp-json\/wp\/v2\/pages\/10272\/revisions"}],"predecessor-version":[{"id":11636,"href":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/wp-json\/wp\/v2\/pages\/10272\/revisions\/11636"}],"up":[{"embeddable":true,"href":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/wp-json\/wp\/v2\/pages\/10232"}],"wp:attachment":[{"href":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/wp-json\/wp\/v2\/media?parent=10272"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}