{"id":7545,"date":"2026-07-16T08:30:00","date_gmt":"2026-07-15T23:30:00","guid":{"rendered":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/?page_id=7545"},"modified":"2026-07-11T12:53:50","modified_gmt":"2026-07-11T03:53:50","slug":"p1404","status":"publish","type":"page","link":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/lecture\/prog\/practice\/p14\/p1404\/","title":{"rendered":"\u7df4\u7fd2 [14] \u69cb\u9020\u4f53\uff084\/5\uff09"},"content":{"rendered":"
\n\t<\/span>\n\t\u30db\u30fc\u30e0<\/span><\/a><\/span><\/div>\n\n\n\n

\u7df4\u7fd2 4<\/strong>\uff08\u63d0\u51fa\u30d7\u30ed\u30b0\u30e9\u30e0\u540d\uff1ap1404.c\uff09<\/h4>\n\n\n\n

\u307e\u305a\uff0c\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\uff08p1404.c\uff09<\/a>\u3068\u30d8\u30c3\u30c0\uff08p1404.h\uff09<\/a>\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u306a\u3055\u3044\uff0e
\uff08\u305f\u3060\u3057\uff0cMac \u74b0\u5883<\/strong>\u306e\u4eba\u306f\u30d8\u30c3\u30c0\u306e\u4e2d\u306e
\u3000\u3000#define CLS \"cls\"<\/kbd>
\u3092
\u3000\u3000#define CLS \"clear\"<\/mark><\/kbd>
\u306b\u66f8\u304d\u63db\u3048\u306a\u3055\u3044\uff0e\uff09

\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b0\u30e9\u30e0 4 \u3092\u3082\u3068\u306b\u3057\u3066\u4f5c\u3063\u305f\u7c21\u5358\u306a\u30b2\u30fc\u30e0\u306b\u306a\u3063\u3066\u3044\u308b\uff0e
\u3053\u306e\u30b2\u30fc\u30e0\u306f\uff0c\u4ee5\u4e0b\u306b\u793a\u3059\u4ed5\u69d8\u306e\u3082\u3068\uff0c\u8feb\u3063\u3066\u304f\u308b\u6575\uff08\u30cf\u30f3\u30bf\u30fc\uff09\u304b\u3089\u9003\u3052\u5207\u308b<\/span><\/mark><\/strong>\u3053\u3068\u304c\u76ee\u7684\u3067\u3042\u308b\uff0e

\u3010\u9003\u8d70\u30b2\u30fc\u30e0\u306e\u4ed5\u69d8\u3011<\/strong>
\uff081\uff09\u30d7\u30ec\u30a4\u30e4\u30fc\u3068\u30cf\u30f3\u30bf\u30fc\u306f\uff0cX-Y \u5ea7\u6a19\u4e0a\u306e\u3044\u305a\u308c\u304b\u306e\u70b9\uff08\u305f\u3060\u3057\uff0cx, y \u3068\u3082\u6574\u6570\uff09\u306b\u4f4d\u7f6e\u3059\u308b\uff0e
\uff082\uff09\u30d7\u30ec\u30a4\u30e4\u30fc\u3068\u30cf\u30f3\u30bf\u30fc\u304c\u52d5\u3051\u308b\u7bc4\u56f2\u306f\u3044\u305a\u308c\u3082
\u3000\u3000\u5ea7\u6a19 (0,0) \u3092\u5de6\u4e0b\uff0c\u5ea7\u6a19 (WIDTH-1, HEIGHT-1) \u3092\u53f3\u4e0a\u3068\u3057\u305f\u56db\u89d2\u5f62\u306e\u4e2d\u306b\u9650\u5b9a<\/span><\/mark><\/strong>\u3068\u3059\u308b\uff0e
\u3000\u3000\uff08\u305f\u3060\u3057\uff0cWIDTH<\/kbd>, HEIGHT<\/kbd>, MAX<\/kbd> \u306f\u3044\u305a\u308c\u3082\u30de\u30af\u30ed\u3067\u3042\u308a\uff0c\u30d8\u30c3\u30c0\u306e\u4e2d\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\uff09
\uff083\uff09\u30d7\u30ec\u30a4\u30e4\u30fc\u3068\u30cf\u30f3\u30bf\u30fc\u306f 1 \u30bf\u30fc\u30f3\u6bce\u306b\u4e0a\u4e0b\u5de6\u53f3\u306e\u3044\u305a\u308c\u304b\u306e\u65b9\u5411\u306b 1 \u30de\u30b9\u3060\u3051\u79fb\u52d5\u3067\u304d\u308b\uff0e
\uff084\uff09\u79fb\u52d5\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u306f\u30d7\u30ec\u30a4\u30e4\u30fc\u304c\u5e38\u306b\u5148\u624b\u3067\u3042\u308a\uff0c\u305d\u308c\u306b\u5fdc\u3058\u3066\u30cf\u30f3\u30bf\u30fc\u3082\u52d5\u3044\u3066\u304f\u308b\uff0e
\uff085\uff09\u30cf\u30f3\u30bf\u30fc\u304c\u30d7\u30ec\u30a4\u30e4\u30fc\u3068\u540c\u3058\u4f4d\u7f6e\u306b\u5230\u9054\u3057\u305f\u3089\uff0c\u30d7\u30ec\u30a4\u30e4\u30fc\u306e\u8ca0\u3051\u3067\u3042\u308b\uff0e
\uff086\uff09\u6355\u307e\u308b\u3053\u3068\u306a\u304f MAX<\/kbd> \u30bf\u30fc\u30f3\u304c\u904e\u304e\u308c\u3070\uff0c\u30d7\u30ec\u30a4\u30e4\u30fc\u306e\u52dd\u3061\u3067\u3042\u308b\uff0e
\uff087\uff09\u3082\u3057\u3082\u52d5\u3051\u306a\u3044\u65b9\u5411\u3078\u79fb\u52d5\u3057\u3088\u3046\u3068\u3057\u305f\u5834\u5408<\/span><\/mark><\/strong>\uff08\u4f8b\u3048\u3070\uff0c\u5ea7\u6a19 (0,0) \u306b\u3044\u3066\uff0c\u5de6\u306b\u79fb\u52d5
\u3000\u3000\u3057\u3088\u3046\u3068\u3057\u305f\u5834\u5408\uff09\u306f\uff0c \u305d\u306e\u30bf\u30fc\u30f3\u306f\u79fb\u52d5\u3067\u304d\u305a\u306b\u305d\u3053\u306b\u5f85\u6a5f<\/span><\/mark><\/strong>\u3068\u306a\u308b\uff0e

\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u306f\uff0c\u30d7\u30ec\u30a4\u30e4\u30fc\u3092\u79fb\u52d5\u3055\u305b\u308b\u95a2\u6570 move <\/kbd>\u304c\u672a\u5b8c\u6210<\/span><\/mark><\/strong>\u306b\u306a\u3063\u3066\u3044\u308b\uff0e
\uff08\u73fe\u72b6\u3067\u306f\u300c\u305d\u306e\u65b9\u5411\u306b\u9003\u3052\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u300d\u3068\u8868\u793a\u3059\u308b\u3060\u3051\u3067\u4f55\u3082\u3057\u3066\u3044\u306a\u3044<\/span>\uff09
\u4ee5\u4e0b\u306e\u4ed5\u69d8\u306b\u5f93\u3063\u3066\uff0c\u3053\u306e\u95a2\u6570\u3092\u5b8c\u6210\u3055\u305b\u306a\u3055\u3044\uff0e
\u306a\u304a\uff0c\u95a2\u6570 move <\/kbd>\u306e\u4e2d\u3067\u306f\u8b1b\u7fa9\u3067\u8aac\u660e\u3057\u305f \u300cp->x<\/kbd>\u300d\u3068\u3044\u3046\u66f8\u304d\u65b9<\/span><\/mark><\/strong>\u3092\u7528\u3044\u308b\u3053\u3068\uff0e

\u3010\u95a2\u6570 move<\/kbd> \u306e\u4ed5\u69d8\u3011<\/strong>
\u25a0 \u5f15\u6570 p<\/kbd> \uff1a\u300c\u30d7\u30ec\u30a4\u30e4\u30fc\u306e\u60c5\u5831\u304c\u5165\u3063\u305f\u69cb\u9020\u4f53\u300d\u3078\u306e\u30dd\u30a4\u30f3\u30bf
\u25a0 \u5f15\u6570 dx<\/kbd>, dy<\/kbd> \uff1a\u30d7\u30ec\u30a4\u30e4\u30fc\u3092 x, y \u65b9\u5411\u306b\u79fb\u52d5\u3055\u305b\u308b\u91cf\uff081, -1, 0 \u306e\u3044\u305a\u308c\u304b\uff09
\u25a0 \u52d5\u4f5c\u5185\u5bb9\uff1a
\u3000\u30dd\u30a4\u30f3\u30bf p<\/kbd> \u304c\u53c2\u7167\u3057\u3066\u3044\u308b\u30d7\u30ec\u30a4\u30e4\u30fc\uff08\u69cb\u9020\u4f53\uff09\u306e x, y \u5ea7\u6a19\u3092\u66f4\u65b0\u3059\u308b\uff0e
\u3000\u66f4\u65b0\u3059\u308b\u91cf\u306f dx<\/kbd>, dy<\/kbd> \u3067\u3042\u308a\uff0c\u305d\u308c\u305e\u308c x \u5ea7\u6a19\u3092 dx<\/kbd> \u3060\u3051, y \u5ea7\u6a19\u3092 dy<\/kbd> \u3060\u3051\u5897\u3084\u3059\uff0e
\u3000\uff08\u306a\u304a\uff0cdx<\/kbd>, dy<\/kbd> \u306f\u8ca0\u306e\u5834\u5408\u3082\u3042\u308b\u304c\uff0c\u6c17\u306b\u305b\u305a\u306b\u8db3\u3057\u3066\u3088\u3044\uff09
\u3000\u305f\u3060\u3057\uff0c\u79fb\u52d5\u3067\u304d\u308b\u7bc4\u56f2\u306b\u306f\u5236\u9650\u304c\u3042\u308b<\/span><\/mark><\/strong>\uff08\u4e0a\u8ff0\u3057\u305f\u4ed5\u69d8\uff082\uff09<\/mark><\/strong>\uff09\u306e\u3067\uff0c
\u3000\u79fb\u52d5\u3067\u304d\u306a\u3044\u5834\u5408\u306f \u300c\u305d\u306e\u65b9\u5411\u306b\u306f\u9003\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u300d \u3068\u3060\u3051\u8868\u793a<\/span><\/mark><\/strong>\u3057\u3066\uff0c
\u3000\u5b9f\u969b\u306f\u79fb\u52d5\u3055\u305b\u306a\u3044<\/span><\/strong><\/mark>\u3053\u3068\uff0e\u4ee5\u4e0b\u306e\u3010\u30d2\u30f3\u30c8\u3011\u3092\u53c2\u7167\u305b\u3088\uff0e<\/mark><\/strong>

\u3010\u6ce8\u610f\u3011<\/strong>
\u3053\u306e\u554f\u984c\u3067\u306f\u95a2\u6570 move <\/kbd>\u3092\u5b8c\u6210\u3055\u305b\u308b\u3060\u3051<\/span><\/mark><\/strong>\u3067\u3042\u308a\uff0c\u4ed6\u306f\u4f55\u3082\u66f8\u304d\u63db\u3048\u306a\u3044<\/mark><\/strong>\u3053\u3068\uff0e
\u305d\u3057\u3066\uff0c p1404.c<\/span><\/mark><\/strong> \u306e\u65b9\u3092\u63d0\u51fa\u3057\u306a\u3055\u3044\uff0e
\u306a\u304a\uff0c\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4e2d\u3067\u30de\u30af\u30ed WIDTH<\/kbd>, HEIGHT <\/kbd>\u3092\u4f7f\u308f\u305a\u306b 3 \u3084 2 \u3068\u3044\u3063\u305f
\u3053\u308c\u3089\u306b\u95a2\u3059\u308b\u6570\u5b57\u3092\u76f4\u63a5\u66f8\u3044\u3066\u306f\u3044\u3051\u307e\u305b\u3093\uff0e<\/p>\n\n\n\n

\u3010\u30d2\u30f3\u30c8\u3011<\/strong>
\u5358\u7d14\u306b\u79fb\u52d5\u3055\u305b\u308b\u3060\u3051\u306a\u3089\u3070
\u3000\u3000p->x += dx;<\/kbd>
\u3000\u3000p->y += dy;<\/kbd>
\u3060\u3051\u3067\u6e08\u3080<\/span><\/strong><\/mark>\u306e\u3067\u3059\u304c\uff0c\u3053\u308c\u3060\u3068\u672c\u6765\u306f\u79fb\u52d5\u3067\u304d\u306a\u3044\u9818\u57df\uff08\u30de\u30c3\u30d7\u306e\u5916\uff09\u306b\u3082\u79fb\u52d5\u3067\u304d\u3066\u3057\u307e\u3046\u306e\u3067\uff0c
if \u6587\u3067\u30c1\u30a7\u30c3\u30af\u3059\u308b\u5fc5\u8981<\/span><\/mark><\/strong>\u304c\u3042\u308a\u307e\u3059\uff0e
\uff1c\u5224\u5b9a\u65b9\u6cd5\uff1e<\/strong><\/mark>
\u3044\u3063\u305f\u3093\uff0c\u5236\u7d04\u306a\u3057\u306b\u79fb\u52d5\u3067\u304d\u305f\u3068\u3057\u3066\uff0c\u79fb\u52d5\u5148\u3068\u306a\u308b\u5ea7\u6a19\u3092 (new_x<\/kbd>, new_y<\/kbd>) \u3068\u3057\u307e\u3059\uff0e
\u305d\u3057\u3066\uff0c\u305d\u306e\u5ea7\u6a19\u304c\u79fb\u52d5\u53ef\u80fd\u306a\u7bc4\u56f2\u5185\u306b\u3042\u308c\u3070<\/mark><\/strong> p->x<\/kbd> \u3068 p->y<\/kbd> \u3092\u305d\u308c\u3089\u3067\u4e0a\u66f8\u304d\u3057\u307e\u3059\uff0e
\u9006\u306b\u7bc4\u56f2\u5916\u306b\u51fa\u3066\u3057\u307e\u3046\u3088\u3046\u3067\u3042\u308c\u3070\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u51fa\u529b\u3059\u308b\u3060\u3051\u306b\u3057\u307e\u3059\uff0e

\u306a\u304a\uff0c\u300c\u79fb\u52d5\u53ef\u80fd\u306a\u7bc4\u56f2\u5185\u306b\u3042\u308b<\/strong>\u300d\u3068\u306f\u6b21\u306e 4 \u3064\u306e\u6761\u4ef6\u304c\u3059\u3079\u3066\u6210\u7acb\u3059\u308b\u5834\u5408\u3068\u540c\u5024\u3067\u3059\uff1a
\u3000\u2460 new_x<\/kbd> \u304c 0<\/kbd> \u4ee5\u4e0a
\u3000\u2461 new_x<\/kbd> \u304c WIDTH<\/kbd> \u672a\u6e80\uff08\u203b WIDTH<\/kbd>\u300c\u4ee5\u4e0b\u3067\u306f\u306a\u3044\u300d\u306e\u3067\u9593\u9055\u3048\u306a\u3044\u3053\u3068\uff09
\u3000\u2462 new_y<\/kbd> \u304c 0<\/kbd> \u4ee5\u4e0a
\u3000\u2463 new_y<\/kbd> \u304c HEIGHT<\/kbd> \u672a\u6e80\uff08\u203b HEIGHT<\/kbd>\u300c\u4ee5\u4e0b\u3067\u306f\u306a\u3044\u300d\u306e\u3067\u9593\u9055\u3048\u306a\u3044\u3053\u3068\uff09

\u305d\u308c\u3086\u3048\uff0c\u4f8b\u3048\u3070
\u3000if ( \u2460\u306e\u6761\u4ef6 &&<\/mark> \u2461\u306e\u6761\u4ef6<\/kbd> &&<\/mark> \u2462\u306e\u6761\u4ef6<\/kbd> &&<\/mark> \u2463\u306e\u6761\u4ef6<\/kbd> )
\u3000{
\u3000\u3000\u3000p->x = new_x;
\u3000\u3000\u3000p->y = new_y;
\u3000}
\u3000else
\u3000{
\u3000\u3000\u3000printf(\"\u305d\u306e\u65b9\u5411\u306b\u9003\u3052\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\\n\");
\u3000}<\/kbd>
\u3068\u3044\u3046\u5177\u5408\u3044\u306b\u66f8\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\uff0e
<\/p>\n\n\n\n