{"id":1157,"date":"2026-05-01T00:06:35","date_gmt":"2026-04-30T16:06:35","guid":{"rendered":"http:\/\/wordpress.fangt.online\/?p=1157"},"modified":"2026-05-01T00:07:07","modified_gmt":"2026-04-30T16:07:07","slug":"%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e4%b8%8e%e5%b8%b8%e9%87%8f%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"http:\/\/wordpress.fangt.online\/index.php\/2026\/05\/01\/%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e4%b8%8e%e5%b8%b8%e9%87%8f%e5%8f%98%e9%87%8f\/","title":{"rendered":"\u6570\u636e\u7c7b\u578b\u4e0e\u5e38\u91cf\u53d8\u91cf"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u6570\u636e\u7c7b\u578b<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6574\u6570\u578b\uff1a<code>short<\/code>\u3001<code>int<\/code>\u3001<code>long<\/code>\u3001<code>long long<\/code>\n<ul class=\"wp-block-list\">\n<li><code>short<\/code>\u5360\u75282\u5b57\u8282\uff0c\u6570\u636e\u8303\u56f4\uff1a-32768\uff5e32767\uff0c\u8be5\u7c7b\u578b\u56e0\u4e3a\u80fd\u5b58\u653e\u7684\u8303\u56f4\u592a\u5c0f\uff0c\u5e73\u65f6\u3001\u6bd4\u8d5b\u65f6\u90fd\u4e0d\u7528\u3002<\/li>\n\n\n\n<li><code>int<\/code>\u5360\u75284\u5b57\u8282\uff0c\u6570\u636e\u8303\u56f4\uff1a-2147483648\uff5e2147483848\uff0cC++\u4e2d\u6574\u6570\u7684\u9ed8\u8ba4\u7c7b\u578b\uff0c\u5e73\u65f6\u5237\u9898\u6700\u5e38\u7528\uff0c\u6bd4\u8d5b\u65f6\u9700\u8981\u6ce8\u610f\u662f\u5426\u591f\u7528\u3002<\/li>\n\n\n\n<li><code>long<\/code>\u5360\u75284\u62168\u5b57\u8282\uff0c\u6570\u636e\u8303\u56f4\u4e0e<code>int<\/code>\u6216<code>long long<\/code>\u4e00\u81f4\uff0c\u53d6\u51b3\u4e8e\u5e73\u53f0\uff0c\u4e0d\u597d\u63a7\u5236\uff0c\u5e73\u65f6\u3001\u6bd4\u8d5b\u65f6\u90fd\u4e0d\u7528\u3002<\/li>\n\n\n\n<li><code>long long<\/code>\u5360\u75288\u5b57\u8282\uff0c\u6570\u636e\u8303\u56f4\uff1a-9.22*10^{18} \u5230 9.22*10^{18}\uff0c\u6bd4\u8d5b\u65f6\uff0c\u4f5c\u4e3aint\u7684\u66ff\u4ee3\u54c1\uff0c\u4e13\u6ce8\u4e8e\u6570\u636e\u8303\u56f4\u8f83\u5927\u7684\u9898\u76ee\u3002\uff08\u6570\u636e\u8303\u56f4\u53ea\u80fd18\u4f4d\u4ee5\u5185\uff0c\u6570\u636e\u8303\u56f4\u8d85\u7ea7\u5927\u7684\u9898\u76ee\u9700\u8981\u7528\u5230\u9ad8\u7cbe\u5ea6\u7b97\u6cd5\uff0c\u540e\u7eed\u8bfe\u7a0b\u624d\u80fd\u8bb2\u5230\uff09<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-accent-1-color\">\u4fee\u9970\u7b26\uff08\u4e86\u89e3\uff09<\/mark><\/strong>\uff1a\u9ed8\u8ba4<code>signed<\/code>\uff0c\u4ee3\u8868\u6570\u636e\u6709\u6b63\u6709\u8d1f\uff0c\u5982\u679c\u6807\u8bb0\u6210<code>unsigned<\/code>\uff0c\u4ee3\u8868\u6ca1\u6709\u7b26\u53f7\u4f4d\uff08\u6ca1\u6709\u8d1f\u6570\uff09\uff0c\u5982<code>unsigned short<\/code>\u4ee3\u88680\uff5e65535\u3002<\/li>\n\n\n\n<li>\u6d6e\u70b9\u578b\uff1a<code>float<\/code>\u3001<code>double<\/code>\n<ul class=\"wp-block-list\">\n<li><code>float<\/code>\uff1a\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\uff0c\u5360\u75284\u5b57\u8282\uff0c\u6709\u6548\u6570\u4f4d6\uff0c\u4e0d\u591f\u7cbe\u786e\uff0c\u57fa\u672c\u4e0d\u7528<\/li>\n\n\n\n<li><code>double<\/code>\uff1a\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\uff0c\u5360\u75288\u5b57\u8282\uff0c\u6709\u6548\u6570\u4f4d16\uff0cC++\u8bed\u8a00\u9ed8\u8ba4\u5b9e\u6570\u7c7b\u578b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5b57\u7b26\u578b\uff1a<code>char<\/code>\n<ul class=\"wp-block-list\">\n<li>\u5360\u7528\u7a7a\u95f41\u5b57\u8282\uff0c\u6570\u636e\u8303\u56f4\uff1a-128\uff5e127\u62160\uff5e255\uff0c\u5bf9\u4e8e\u5b57\u7b26\u578b\u6211\u4eec\u53ea\u4f7f\u75280\uff5e127\u8fd9\u4e2a\u8303\u56f4\uff0c\u56e0\u6b64\u6570\u636e\u8303\u56f4\u6709\u65e0\u7b26\u53f7\u4e0d\u5f71\u54cd\u4f7f\u7528<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-accent-1-color\">ASCII\u7801<\/mark><\/strong>\uff1a\u4f7f\u7528 <strong>7 \u4f4d<\/strong>\u4e8c\u8fdb\u5236\u8868\u793a\u5b57\u7b26\uff0c\u5171 <strong>128 \u4e2a<\/strong>\u5b57\u7b26\uff080-127\uff09\u3002\n<ul class=\"wp-block-list\">\n<li>\u5b57\u7b26\u7ec4\u89c4\u5f8b\n<ul class=\"wp-block-list\">\n<li>\u5b57\u7b26&#8217;0&#8217;~&#8217;9&#8217;\uff1a48~57<\/li>\n\n\n\n<li>\u5b57\u7b26&#8217;A&#8217;~&#8217;Z&#8217;\uff1a65~90<\/li>\n\n\n\n<li>\u5b57\u7b26&#8217;a&#8217;~&#8217;z&#8217;\uff1a97~122<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"http:\/\/wordpress.fangt.online\/tools\/ascii.html\">ASCII\u7801\u8868<\/a><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5e03\u5c14\u578b\uff1a<code>bool<\/code>\n<ul class=\"wp-block-list\">\n<li>bool\u7c7b\u578b\u53ea\u6709\u4e24\u4e2a\u503c\uff1atrue\u3001false\uff0c\u5bf9\u5e941\u548c0<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-accent-1-color\"><code>sizeof<\/code>\u6307\u4ee4<\/mark>\uff1a\u7528\u4e8e\u8f93\u51fa\u67d0\u4e2a\u7a7a\u95f4\u5360\u7528\u7684\u5927\u5c0f<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream>\nusing namespace std;\nint main() { \n    int a;\n    cout &lt;&lt; sizeof(a) &lt;&lt; endl; \/\/ 4\n    cout &lt;&lt; sizeof(bool) &lt;&lt; endl; \/\/ 1\n    cout &lt;&lt; sizeof(long long) &lt;&lt; endl; \/\/ 8\n    return 0;\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u7c7b\u578b\u8f6c\u6362<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u663e\u793a\u8f6c\u6362\uff1a\u76f8\u5f53\u4e8e\u660e\u786e\u544a\u8bc9\u7535\u8111\u8f6c\u6362\u6210\u4ec0\u4e48\u7c7b\u578b<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5199\u6cd51:static_cast&lt;\u76ee\u6807\u7c7b\u578b>(\u5f53\u524d\u6570\u636e)\nint a=static_cast&lt;int>(1.5); \/\/ \u5c06double\u7c7b\u578b\u76841.5\u8f6c\u6362\u6210int\u7c7b\u578b\uff0c\u518d\u8d4b\u503c\u7ed9a\n\/\/ \u5199\u6cd52:(\u76ee\u6807\u7c7b\u578b)\u5f53\u524d\u6570\u636e\nint b=(int)1.5;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u9690\u5f0f\u8f6c\u6362\uff1a\u7535\u8111\u6839\u636e\u81ea\u5df1\u7684\u5224\u65ad\u8f6c\u6362<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u540c\u7c7b\u578b\u8f6c\u6362\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5c0f\u7a7a\u95f4->\u5927\u7a7a\u95f4\u65e0\u635f\uff1ashort->int->long long\uff0cfloat->double<\/li>\n\n\n\n<li>\u5927\u7a7a\u95f4->\u5c0f\u7a7a\u95f4\u4e22\u5931\uff1along long->int->short\uff0cdouble->float<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5f02\u7c7b\u578b\u8f6c\u6362\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6574\u6570->\u6d6e\u70b9\u8d4b\u503c\u8f6c\u6362\uff08\u540c\u7a7a\u95f4\u5927\u5c0f\u4e0d\u4e22\u5931\uff09<\/li>\n\n\n\n<li>\u6d6e\u70b9->\u6574\u6570\u8d4b\u503c\u8f6c\u6362\uff08\u5c0f\u6570\u90e8\u5206\u4e22\u5931\uff09<\/li>\n\n\n\n<li>\u6574\u6570->\u5b57\u7b26\u8d4b\u503c\u8f6c\u6362\uff08\u7b26\u5408\u5927\u7a7a\u95f4\u8f6c\u5c0f\u7a7a\u95f4\uff09<\/li>\n\n\n\n<li>\u5b57\u7b26->\u6574\u6570\u8d4b\u503c\u8f6c\u6362\uff08\u53ea\u5728ASCII\u7801\u8303\u56f4\u5185\uff09<\/li>\n\n\n\n<li>\u5b57\u7b26->\u6574\u6570\u901a\u8fc7\u6570\u5b66\u8ba1\u7b97\u8f6c\u6362<\/li>\n\n\n\n<li>\u5e03\u5c14->\u6574\u6570\u8d4b\u503c\u8f6c\u6362\uff08\u53ea\u67090\u548c1\uff09<\/li>\n\n\n\n<li>\u6574\u6570->\u5e03\u5c14\u8d4b\u503c\u8f6c\u6362\uff08\u53ea\u67090\u548c1\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>int a = 123;\nlong long b = a; \/\/ \u8d4b\u503c\u8f6c\u6362\uff0c\u5927\u7a7a\u95f4\u65e0\u635f\nint c = 1.5; \/\/ \u8d4b\u503c\u8f6c\u6362\uff0c\u5c0f\u6570\u90e8\u5206\u4e22\u5931\nchar c = 'A';\nint d = c; \/\/ \u8d4b\u503c\u8f6c\u6362\uff0c\u53d8\u621065\uff08'A'\u7684ASCII\u7801\u503c\uff09\nbool e = 666; \/\/ \u8d4b\u503c\u8f6c\u6362\uff0c\u53d8\u6210true\uff081\uff09\nint f = false; \/\/ \u8d4b\u503c\u8f6c\u6362\uff0c\u53d8\u62100\uff08false\uff09\nchar g = 'a';\ncout &lt;&lt; g+0; \/\/ \u6570\u5b66\u8ba1\u7b97\u8f6c\u6362\uff0c\u503c\u4e3a97\uff08'a'\u7684ASCII\u7801\u503c\uff09<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b57\u6bcd\u5927\u5c0f\u5199\u8f6c\u6362<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>char c = 'A';\nc += 32; \/\/ \u53d8\u5c0f\u5199\nc -= 32; \/\/ \u53d8\u5927\u5199<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u5e38\u91cf\u53d8\u91cf<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u53d8\u91cf\uff1a\u901a\u5e38\u6307\u53ef\u4ee5\u6539\u53d8\u7684\u91cf<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e38\u91cf\uff1a\u901a\u5e38\u6307\u65e0\u6cd5\u6539\u53d8\u7684\u91cf<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u53d8\u91cf\u4f7f\u7528<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>int a; \/\/ \u5b9a\u4e49\u6574\u578b\u53d8\u91cfa\uff0c\u53ef\u4ee5\u5148\u4e0d\u8d4b\u503c\na=6; \/\/ \u5c06a\u7684\u503c\u4fee\u6539\u62106\na=7; \/\/ \u5c06a\u7684\u503c\u4fee\u6539\u62107\nint b=4; \/\/ \u5b9a\u4e49\u6574\u578b\u53d8\u91cfb\u5e76\u521d\u59cb\u5316\u4e3a4<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e38\u91cf\u4f7f\u7528<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>#define \u9884\u5904\u7406\u5e38\u91cf<\/li>\n\n\n\n<li>const \u5b9a\u4e49\u5e38\u91cf<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream> \nusing namespace std;\n#define P 3.14 \/\/ \u9884\u5904\u74063.14\u7528P\u4ee3\u66ff\nint main(){\n    \/\/ const \u5b9a\u4e49\u5e38\u91cf\n    const int a=5; \/\/ \u5b9a\u4e49\u5e38\u91cfa\u7684\u503c\u4e3a5\uff0c\u5b9a\u4e49\u7684\u540c\u65f6\u5fc5\u987b\u8d4b\u503c\n    a=6; \/\/ \u62a5\u9519\uff0c\u5e38\u91cf\u65e0\u6cd5\u4fee\u6539\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u636e\u7c7b\u578b \u7c7b\u578b\u8f6c\u6362 \u663e\u793a\u8f6c\u6362\uff1a\u76f8\u5f53\u4e8e\u660e\u786e\u544a\u8bc9\u7535\u8111\u8f6c\u6362\u6210\u4ec0\u4e48\u7c7b\u578b \u9690\u5f0f\u8f6c\u6362\uff1a\u7535\u8111\u6839\u636e\u81ea\u5df1\u7684\u5224\u65ad\u8f6c\u6362 \u5b57\u6bcd\u5927\u5c0f\u5199\u8f6c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[],"class_list":["post-1157","post","type-post","status-publish","format-standard","hentry","category-zl"],"_links":{"self":[{"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/posts\/1157","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/comments?post=1157"}],"version-history":[{"count":1,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/posts\/1157\/revisions"}],"predecessor-version":[{"id":1160,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/posts\/1157\/revisions\/1160"}],"wp:attachment":[{"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/media?parent=1157"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/categories?post=1157"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/tags?post=1157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}