{"id":1454,"date":"2022-01-07T16:12:05","date_gmt":"2022-01-07T08:12:05","guid":{"rendered":"http:\/\/139.9.1.231\/?p=1454"},"modified":"2022-01-07T16:12:06","modified_gmt":"2022-01-07T08:12:06","slug":"ifelse","status":"publish","type":"post","link":"http:\/\/139.9.1.231\/index.php\/2022\/01\/07\/ifelse\/","title":{"rendered":"c++ \u5206\u652f\u8bed\u53e5\u548c\u903b\u8f91\u8fd0\u7b97\u7b26"},"content":{"rendered":"\n<ul><li>if\u8bed\u53e5<\/li><li>\u903b\u8f91\u8fd0\u7b97\u7b26 &amp;&amp; \uff01 ||<\/li><li>cctype\u5b57\u7b26\u51fd\u6570\u5e93<\/li><li>\u6761\u4ef6\u8fd0\u7b97\u7b26:?\uff1a<\/li><li>switch\u8bed\u53e5 <\/li><li>continue\u548cbreak<\/li><li>\u8bfb\u53d6\u6570\u5b57\u7684\u5faa\u73af<\/li><li>\u57fa\u672c\u6587\u4ef6\u8f93\u5165\u8f93\u51fa<\/li><\/ul>\n\n\n\n<p class=\"has-light-pink-background-color has-background\">1\u3001 if\u8bed\u53e5<\/p>\n\n\n\n<p>      if (test_condition){  body  } \u5982\u679ctest_condition\u4e3atrue\uff0c\u90a3\u4e48\u5c31\u6267\u884c body\u8bed\u53e5\u3002<\/p>\n\n\n\n<p class=\"has-light-pink-background-color has-background\">2\u3001 if  else \u8bed\u53e5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>if\uff08test_condition\uff09\n    {body}\nelse\n    {body}<\/code><\/pre>\n\n\n\n<p class=\"has-light-pink-background-color has-background\">3\u3001 if else if  else \u8bed\u53e5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>if\uff08test_condition\uff09\n    {body}\nelse if\n    {body}\n\nelse\n    {body}<\/code><\/pre>\n\n\n\n<p>\u6613\u9519\u70b9\uff1a\u8d4b\u503c\u8fd0\u7b97\u7b26=\u548c\u6bd4\u8f83\u8fd0\u7b97\u7b26==\uff0c\u5728test_condition\u4e2d\u4f7f\u7528==\u8868\u8fbe\u7b49\u4e8e<\/p>\n\n\n\n<p class=\"has-light-gray-background-color has-background\">\u903b\u8f91\u8868\u8fbe\u5f0f<\/p>\n\n\n\n<p>1\u3001\u903b\u8f91\u6216 ||<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img loading=\"lazy\" width=\"1024\" height=\"205\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-127-1024x205.png\" alt=\"\" class=\"wp-image-1479\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-127-1024x205.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-127-300x60.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-127-768x154.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-127.png 1535w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p> <\/p>\n\n\n\n<p>2\u3001\u903b\u8f91\u4e0e &amp;&amp;<\/p>\n\n\n\n<p>A&amp;&amp;B   \u53ea\u6709A\u548cB\u90fd\u4e3atrue\u65f6\uff0c\u8868\u8fbe\u5f0f\u624d\u4e3atrue\\<\/p>\n\n\n\n<p>\u53ef\u4ee5\u7528\u6765\u8868\u793a\u8303\u56f4 A&lt;20 &amp;&amp; A> 30<\/p>\n\n\n\n<p>3\u3001\u903b\u8f91\u975e \uff01<\/p>\n\n\n\n<p>\uff01A  <\/p>\n\n\n\n<p>\u6ce8\u610f\uff1a \u903b\u8f91\u8fd0\u7b97\u7b26 &amp;&amp;\u548c||\u4f18\u5148\u7ea7\u90fd\u4f4e\u4e8e\u5173\u7cfb\u8fd0\u7b97\u7b26\uff0c\uff01\u8fd0\u7b97\u7b26\u5219\u5927\u4e8e\u6240\u6709\u5173\u7cfb\u8fd0\u7b97\u7b26\u548c\u7b97\u6570\u8fd0\u7b97\u7b26\u3002<\/p>\n\n\n\n<p><strong>\u6b64\u5916\u53ef\u4ee5\u4f7f\u7528 and  or  not\u8868\u793a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img loading=\"lazy\" width=\"1024\" height=\"218\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-128-1024x218.png\" alt=\"\" class=\"wp-image-1480\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-128-1024x218.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-128-300x64.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-128-768x164.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-128.png 1487w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"has-light-gray-background-color has-background\">\u5b57\u7b26\u51fd\u6570\u5e93 cctype   #include &lt;cctype><\/p>\n\n\n\n<p>\u8be5\u5934\u6587\u4ef6\u58f0\u660e\u4e86\u4e00\u7ec4\u7528\u4e8e\u5bf9\u5355\u4e2a\u5b57\u7b26\u8fdb\u884c\u5206\u7c7b\u548c\u8f6c\u6362\u7684\u51fd\u6570\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img loading=\"lazy\" width=\"1024\" height=\"652\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-130-1024x652.png\" alt=\"\" class=\"wp-image-1482\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-130-1024x652.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-130-300x191.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-130-768x489.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-130-1536x977.png 1536w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-130.png 1573w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img loading=\"lazy\" width=\"1024\" height=\"205\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-129-1024x205.png\" alt=\"\" class=\"wp-image-1481\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-129-1024x205.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-129-300x60.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-129-768x154.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-129-1536x308.png 1536w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-129.png 1616w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"has-light-gray-background-color has-background\">\u6761\u4ef6\u8fd0\u7b97\u7b26 ?:<\/p>\n\n\n\n<p>\u8868\u8fbe\u5f0f1?\u8868\u8fbe\u5f0f2\uff1a\u8868\u8fbe\u5f0f3<\/p>\n\n\n\n<p>a>1?b=2:b=4 \u5982\u679ca>1,\u90a3\u4e48\u4ee4b=2\uff0c\u5426\u5219b=4<\/p>\n\n\n\n<p class=\"has-light-gray-background-color has-background\">switch\u8bed\u53e5  case\u4e2d\u7684value\u5fc5\u987b\u662fint\u6574\u6570<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>switch(interger-expression){\n    case value1: \n             body;\n             break;\n    case value2: \n             body;\n             break;\n    .............\n    case valuen: \n             body;\n             break;\ndefault\uff1abody\n}\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img loading=\"lazy\" width=\"1024\" height=\"98\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-131-1024x98.png\" alt=\"\" class=\"wp-image-1485\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-131-1024x98.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-131-300x29.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-131-768x73.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-131-1536x146.png 1536w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-131.png 1616w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"has-light-gray-background-color has-background\">break\u548ccontinue<\/p>\n\n\n\n<p>break\u7528\u4e8eswitch\u8bed\u53e5\uff0c\u8df3\u51faswitch\uff1bcontinue\u7528\u4e8e\u5faa\u73af\u8bed\u53e5\uff0c\u7528\u4e8e\u8df3\u51fa\u672c\u6b21\u5faa\u73af\u3002<\/p>\n\n\n\n<p class=\"has-light-pink-background-color has-background\"><strong>\u5199\u6587\u672c\u6587\u4ef6<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img loading=\"lazy\" width=\"1024\" height=\"509\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-132-1024x509.png\" alt=\"\" class=\"wp-image-1489\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-132-1024x509.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-132-300x149.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-132-768x382.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-132-1536x764.png 1536w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-132.png 1579w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img loading=\"lazy\" width=\"1024\" height=\"277\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-133-1024x277.png\" alt=\"\" class=\"wp-image-1490\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-133-1024x277.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-133-300x81.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-133-768x208.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-133-1536x415.png 1536w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-133.png 1586w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img loading=\"lazy\" width=\"1024\" height=\"398\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-134-1024x398.png\" alt=\"\" class=\"wp-image-1491\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-134-1024x398.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-134-300x117.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-134-768x299.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-134-1536x597.png 1536w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-134.png 1543w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"has-light-pink-background-color has-background\">\u8bfb\u53d6\u6587\u4ef6<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img loading=\"lazy\" width=\"1024\" height=\"705\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-135-1024x705.png\" alt=\"\" class=\"wp-image-1492\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-135-1024x705.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-135-300x207.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-135-768x529.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-135-1536x1058.png 1536w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-135.png 1543w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<iframe frameborder=\"no\" border=\"0\" marginwidth=\"0\" marginheight=\"0\" width=330 height=86 src=\"\/\/music.163.com\/outchain\/player?type=2&#038;id=530844206&#038;auto=0&#038;height=66\"><\/iframe>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>if\u8bed\u53e5 \u903b\u8f91\u8fd0\u7b97\u7b26 &amp;&amp; \uff01 || cctype\u5b57\u7b26\u51fd\u6570\u5e93 \u6761\u4ef6\u8fd0\u7b97\u7b26:?\uff1a switch\u8bed &hellip; <a href=\"http:\/\/139.9.1.231\/index.php\/2022\/01\/07\/ifelse\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">c++ \u5206\u652f\u8bed\u53e5\u548c\u903b\u8f91\u8fd0\u7b97\u7b26<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[],"_links":{"self":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/1454"}],"collection":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/comments?post=1454"}],"version-history":[{"count":10,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/1454\/revisions"}],"predecessor-version":[{"id":1493,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/1454\/revisions\/1493"}],"wp:attachment":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/media?parent=1454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/categories?post=1454"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/tags?post=1454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}