{"id":198576,"date":"2024-11-14T20:25:09","date_gmt":"2024-11-14T12:25:09","guid":{"rendered":"https:\/\/server.hk\/cnblog\/198576\/"},"modified":"2024-11-14T20:25:10","modified_gmt":"2024-11-14T12:25:10","slug":"%e3%80%8c%e6%b7%b1%e5%85%a5%e6%8e%a2%e6%9e%90%e3%80%8dlinux-%e4%b8%8b%e7%9a%84-printf-%e5%87%bd%e6%95%b8-linux%e4%b8%8bprintf","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/198576\/","title":{"rendered":"\u300c\u6df1\u5165\u63a2\u6790\u300dLinux \u4e0b\u7684 printf \u51fd\u6578 (linux\u4e0bprintf)"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e6%8e%a2%e6%9e%90-linux-%e4%b8%8b%e7%9a%84-printf-%e5%87%bd%e6%95%b8-hXKfJvmUKF\">\u6df1\u5165\u63a2\u6790 Linux \u4e0b\u7684 printf \u51fd\u6578<\/h1>\n<p>\u5728 Linux \u74b0\u5883\u4e2d\uff0c<code>printf<\/code> \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u8f38\u51fa\u51fd\u6578\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc C \u8a9e\u8a00\u53ca\u5176\u884d\u751f\u8a9e\u8a00\u4e2d\u3002\u5b83\u7684\u4e3b\u8981\u529f\u80fd\u662f\u683c\u5f0f\u5316\u8f38\u51fa\u6578\u64da\uff0c\u4e26\u5c07\u5176\u986f\u793a\u5728\u6a19\u6e96\u8f38\u51fa\u8a2d\u5099\u4e0a\uff08\u901a\u5e38\u662f\u7d42\u7aef\uff09\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e <code>printf<\/code> \u51fd\u6578\u7684\u57fa\u672c\u7528\u6cd5\u3001\u683c\u5f0f\u5316\u9078\u9805\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"1-printf-%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-hXKfJvmUKF\">1. printf \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p><code>printf<\/code> \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>int printf(const char *format, ...);<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>format<\/code> \u662f\u4e00\u500b\u683c\u5f0f\u5b57\u7b26\u4e32\uff0c\u5f8c\u9762\u7684\u7701\u7565\u865f\uff08<code>...<\/code>\uff09\u8868\u793a\u53ef\u4ee5\u63a5\u53d7\u53ef\u8b8a\u6578\u91cf\u7684\u53c3\u6578\u3002\u683c\u5f0f\u5b57\u7b26\u4e32\u4e2d\u53ef\u4ee5\u5305\u542b\u6587\u672c\u548c\u683c\u5f0f\u6307\u793a\u7b26\uff0c\u683c\u5f0f\u6307\u793a\u7b26\u4ee5\u767e\u5206\u865f\uff08<code>%<\/code>\uff09\u958b\u982d\uff0c\u5f8c\u9762\u8ddf\u96a8\u7279\u5b9a\u7684\u5b57\u7b26\u4f86\u6307\u5b9a\u6578\u64da\u985e\u578b\u3002<\/p>\n<h2 id=\"2-%e6%a0%bc%e5%bc%8f%e6%8c%87%e7%a4%ba%e7%ac%a6-hXKfJvmUKF\">2. \u683c\u5f0f\u6307\u793a\u7b26<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u683c\u5f0f\u6307\u793a\u7b26\uff1a<\/p>\n<ul>\n<li><code>%d<\/code>\uff1a\u6574\u6578\uff08\u5341\u9032\u5236\uff09<\/li>\n<li><code>%f<\/code>\uff1a\u6d6e\u9ede\u6578<\/li>\n<li><code>%s<\/code>\uff1a\u5b57\u7b26\u4e32<\/li>\n<li><code>%c<\/code>\uff1a\u5b57\u7b26<\/li>\n<li><code>%x<\/code>\uff1a\u5341\u516d\u9032\u5236\u6574\u6578<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u78bc\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 <code>printf<\/code> \u51fd\u6578\u8f38\u51fa\u4e0d\u540c\u985e\u578b\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>#include &lt;stdio.h&gt;\n\nint main() {\n    int num = 10;\n    float fnum = 3.14;\n    char str[] = \"Hello, World!\";\n    \n    printf(\"\u6574\u6578: %dn\", num);\n    printf(\"\u6d6e\u9ede\u6578: %.2fn\", fnum);\n    printf(\"\u5b57\u7b26\u4e32: %sn\", str);\n    \n    return 0;\n}<\/code><\/pre>\n<h2 id=\"3-%e6%a0%bc%e5%bc%8f%e5%8c%96%e9%81%b8%e9%a0%85-hXKfJvmUKF\">3. \u683c\u5f0f\u5316\u9078\u9805<\/h2>\n<p>\u9664\u4e86\u57fa\u672c\u7684\u683c\u5f0f\u6307\u793a\u7b26\uff0c<code>printf<\/code> \u9084\u652f\u6301\u591a\u7a2e\u683c\u5f0f\u5316\u9078\u9805\uff0c\u9019\u4e9b\u9078\u9805\u53ef\u4ee5\u7528\u4f86\u63a7\u5236\u8f38\u51fa\u7684\u683c\u5f0f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u683c\u5f0f\u5316\u9078\u9805\uff1a<\/p>\n<ul>\n<li><code>width<\/code>\uff1a\u6307\u5b9a\u8f38\u51fa\u5b57\u6bb5\u7684\u6700\u5c0f\u5bec\u5ea6\u3002<\/li>\n<li><code>.precision<\/code>\uff1a\u6307\u5b9a\u6d6e\u9ede\u6578\u7684\u5c0f\u6578\u4f4d\u6578\u3002<\/li>\n<li><code>-<\/code>\uff1a\u5de6\u5c0d\u9f4a\u8f38\u51fa\u3002<\/li>\n<li><code>0<\/code>\uff1a\u7528\u96f6\u586b\u5145\u7a7a\u767d\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u78bc\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u9019\u4e9b\u9078\u9805\uff1a<\/p>\n<pre><code>#include &lt;stdio.h&gt;\n\nint main() {\n    int num = 42;\n    float fnum = 3.14159;\n    \n    printf(\"\u6700\u5c0f\u5bec\u5ea6 5: |%5d|n\", num);\n    printf(\"\u6700\u5c0f\u5bec\u5ea6 5\uff0c\u5de6\u5c0d\u9f4a: |%-5d|n\", num);\n    printf(\"\u6d6e\u9ede\u6578\uff0c\u5169\u4f4d\u5c0f\u6578: |%.2f|n\", fnum);\n    printf(\"\u7528\u96f6\u586b\u5145: |%05d|n\", num);\n    \n    return 0;\n}<\/code><\/pre>\n<h2 id=\"4-%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e4%b8%ad%e7%9a%84-printf-%e5%87%bd%e6%95%b8-hXKfJvmUKF\">4. \u5be6\u969b\u61c9\u7528\u4e2d\u7684 printf \u51fd\u6578<\/h2>\n<p><code>printf<\/code> \u51fd\u6578\u5728\u8a31\u591a\u5be6\u969b\u61c9\u7528\u4e2d\u90fd\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5728\u8abf\u8a66\u904e\u7a0b\u4e2d\uff0c\u958b\u767c\u8005\u7d93\u5e38\u4f7f\u7528 <code>printf<\/code> \u4f86\u8f38\u51fa\u8b8a\u91cf\u7684\u503c\uff0c\u4ee5\u4fbf\u6aa2\u67e5\u7a0b\u5f0f\u7684\u57f7\u884c\u72c0\u614b\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u8abf\u8a66\u793a\u4f8b\uff1a<\/p>\n<pre><code>#include &lt;stdio.h&gt;\n\nvoid debug(int value) {\n    printf(\"\u7576\u524d\u503c: %dn\", value);\n}\n\nint main() {\n    for (int i = 0; i &lt; 5; i++) {\n        debug(i);\n    }\n    \n    return 0;\n}<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c<code>debug<\/code> \u51fd\u6578\u4f7f\u7528 <code>printf<\/code> \u8f38\u51fa\u7576\u524d\u7684\u8b8a\u91cf\u503c\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u4e86\u89e3\u7a0b\u5f0f\u7684\u904b\u884c\u72c0\u614b\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-hXKfJvmUKF\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u7684\u4f86\u8aaa\uff0c<code>printf<\/code> \u51fd\u6578\u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u683c\u5f0f\u5316\u548c\u8f38\u51fa\u5404\u7a2e\u6578\u64da\u3002\u7121\u8ad6\u662f\u5728\u65e5\u5e38\u7684\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0c\u9084\u662f\u5728\u8abf\u8a66\u904e\u7a0b\u4e2d\uff0c<code>printf<\/code> \u90fd\u626e\u6f14\u8457\u91cd\u8981\u7684\u89d2\u8272\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u60a8\u7684\u61c9\u7528\u5728\u7a69\u5b9a\u7684\u74b0\u5883\u4e2d\u904b\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u6790Linux\u4e0b\u7684printf\u51fd\u6570\uff0c\u4e86\u89e3\u5176\u7528\u6cd5\u3001\u683c\u5f0f\u5316\u8f93\u51fa\u53ca\u5e38\u89c1\u95ee\u9898\uff0c\u63d0\u5347\u4f60\u7684\u7f16\u7a0b\u6280\u80fd\u4e0e\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-198576","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/198576","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=198576"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/198576\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=198576"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=198576"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=198576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}