{"id":9124,"date":"2026-04-16T08:30:00","date_gmt":"2026-04-15T23:30:00","guid":{"rendered":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/?page_id=9124"},"modified":"2026-04-11T19:12:03","modified_gmt":"2026-04-11T10:12:03","slug":"p0204a","status":"publish","type":"page","link":"https:\/\/se.cite.ehime-u.ac.jp\/jp\/lecture\/prog\/practice-advance\/p02\/p0204a\/","title":{"rendered":"\u7df4\u7fd2 [2] if \u6587\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\uff1ap0204a.c\uff09<\/h4>\n\n\n\n

\u4ee5\u4e0b\u306e\u4f8b\u306e\u3088\u3046\u306b\u5b9f\u884c\u3067\u304d\u308b<\/mark><\/strong>\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u308a\u306a\u3055\u3044\uff0e\u63d0\u51fa\u30d5\u30a1\u30a4\u30eb\u540d\u306f p0204a.c<\/mark><\/strong> \u3068\u3057\u306a\u3055\u3044\uff0e
\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u306f\u5165\u529b\u3055\u308c\u308b 2 \u4eba\u306e\u6210\u7e3e\u306e\u5dee\uff08\u7d76\u5bfe\u5024<\/strong>\uff09\u3092 a \u3068\u3057\u3066\uff0c
\u3000(1) a == 0 <\/strong><\/span>\u306a\u3089\u3070\uff1a\u300c\u5168\u304f\u540c\u3058\u3067\u3059\u306d<\/span><\/strong>\u300d\u3068\u8868\u793a\u3059\u308b\uff0e
\u3000(2) <\/strong>(1) \u3067\u306f\u306a\u3044\u304c<\/strong> a < 10<\/strong><\/mark> \u306a\u3089\u3070\uff1a\u300c\u307b\u307c\u540c\u3058\u3067\u3059\u306d<\/mark><\/strong>\u300d\u3068\u8868\u793a\u3059\u308b\uff0e
\u3000(3) (1), (2) \u3067\u306f\u306a\u3044\u304c a < 20<\/mark> <\/strong>\u306a\u3089\u3070\uff1a\u300c\u5dee\u304c\u3064\u304d\u307e\u3057\u305f\u306d<\/strong>\u300d\u3068\u8868\u793a\u3059\u308b\uff0e
\u3000(4) \u4e0a\u306e\u3044\u305a\u308c\u3082\u3067\u3082\u306a\u3044\u5834\u5408\uff1a\u300c\u52dd\u8ca0\u306b\u306a\u308a\u307e\u305b\u3093\u306d\u300d\u3068\u8868\u793a\u3059\u308b\uff0e

\u305f\u3060\u3057\uff0c\u7d76\u5bfe\u5024 a \u3092\u6c42\u3081\u308b\u306b\u3042\u305f\u3063\u3066\uff0cC \u8a00\u8a9e\u306b\u4e88\u3081\u7528\u610f\u3055\u308c\u3066\u3044\u308b abs \u3068\u3044\u3046\u95a2\u6570\u3092\u4f7f\u3063\u3066\u306f\u3044\u3051\u307e\u305b\u3093\uff0e<\/span><\/p>\n\n\n\n

\u3010\u30d2\u30f3\u30c81\u3011\u7d76\u5bfe\u5024 |x-y| \u306e\u6c42\u3081\u65b9
a = x-y;
if ( a < 0 )<\/kbd>
{
   a = -a;
}<\/kbd><\/p>\n\n\n\n

\u3010\u30d2\u30f3\u30c82\u3011
\u3053\u306e\u554f\u984c\u306e\u3088\u3046\u306b\u8907\u6570\u306e if – else \u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304f\u3068\u826f\u3044\u3067\u3059\uff1a

\u3000if ( a == 0<\/mark> )<\/kbd>
\u3000{
\u3000\u3000\u3000.......\u3000\u2190\u3000\u6761\u4ef6\uff081\uff09\u304c\u6210\u308a\u7acb\u3064\u3068\u304d\u306e\u51e6\u7406
\u3000}
\u3000else if ( a < 10<\/mark> )<\/kbd>\u3000\u2190 \u3053\u3053\u3092 (a < 10)<\/mark> && (a != 0)<\/mark><\/kbd> \u3068\u66f8\u304f\u4eba\u304c\u3044\u307e\u3059\u304c\uff0c&&<\/kbd> (a != 0)<\/kbd> \u306f\u4e0d\u8981<\/mark>\u3067\u3059\uff0e<\/sub>
\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\uff11\u756a\u76ee\u306e if \u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u3066\u3044\u306a\u3044\u306e\u3067\uff0c\u3053\u306e\u6642\u70b9\u3067 a != 0<\/kbd> \u306a\u306e\u306f\u660e\u3089\u304b<\/mark>\u3067\u3059\uff0e<\/sub>
\u3000{
\u3000\u3000\u3000......\u3000\u2190\u3000\u6761\u4ef6\uff081\uff09\u306f\u6210\u308a\u7acb\u305f\u306a\u3044\u304c\uff0c\u6761\u4ef6\uff082\uff09\u306f\u6210\u308a\u7acb\u3064\u3068\u304d\u306e\u51e6\u7406<\/kbd>
\u3000}
\u3000else if ( \u6761\u4ef6\uff083\uff09 )<\/kbd>
\u3000{
\u3000\u3000\u3000......\u3000\u2190\u3000\u6761\u4ef6\uff081\uff09,\uff082\uff09 \u306f\u6210\u308a\u7acb\u305f\u306a\u3044\u304c\uff0c\u6761\u4ef6\uff083\uff09<\/kbd><\/kbd>\u306f\u6210\u308a\u7acb\u3064\u3068\u304d\u306e\u51e6\u7406<\/kbd>
\u3000}
\u3000else<\/kbd>
\u3000{
\u3000\u3000\u3000......\u3000\u2190\u3000\u3044\u305a\u308c\u3082\u6210\u308a\u7acb\u305f\u306a\u3044\u3068\u304d\u306e\u51e6\u7406<\/kbd>
\u3000}<\/kbd><\/p>\n\n\n\n