{"id":324,"date":"2023-09-16T10:32:10","date_gmt":"2023-09-16T02:32:10","guid":{"rendered":""},"modified":"2023-09-18T11:49:45","modified_gmt":"2023-09-18T03:49:45","slug":"%e5%ad%97%e7%ac%a6%e6%95%b0%e7%bb%84%e5%88%9d%e5%a7%8b%e5%8c%96%e4%b8%ba%e7%a9%ba","status":"publish","type":"post","link":"https:\/\/mushiming.com\/324.html","title":{"rendered":"\u5b57\u7b26\u6570\u7ec4\u521d\u59cb\u5316\u4e3a\u7a7a"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<div class=\"toc\">\n<h3>\u5b57\u7b26\u6570\u7ec4\u521d\u59cb\u5316\u4e3a\u7a7a<\/h3>\n<ul>\n<li>1. \u603b\u7ed3\u8d77\u6765\u6709\u4ee5\u4e0b5\u79cd\u65b9\u5f0f\uff1a<\/li>\n<li>2. \u5206\u6790<\/li>\n<li>3. \u7ed3\u8bba<\/li>\n<li>4. \u6269\u5c55\uff1a<\/li>\n<li>\n<ul>\n<li>4.1 \u4e0d\u4f7f\u7528 szName[0] = '0'\uff0c\u4f7f\u7528szName[0] = 0<\/li>\n<li>4.2 \u7a7a\u5b57\u7b26\u4e32\u5224\u65ad<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<h1>1. \u603b\u7ed3\u8d77\u6765\u6709\u4ee5\u4e0b5\u79cd\u65b9\u5f0f\uff1a<\/h1>\n<pre class=\"language-java prettyprint linenums\"><code>#define STR_LEN      1023\n\n(1) char str[STR_LEN + 1]=\"\";\n(2) char str[STR_LEN + 1]={'\\0'};\n(3) char str[STR_LEN + 1];\n\tstr[0] = '\\0';\n(4) char str[STR_LEN + 1];\n\tstr[0] = 0;\n(5) char str[STR_LEN + 1];\n\tmemset(str, 0 ,sizeof(str));\n<\/code><\/pre>\n<h1>2. \u5206\u6790<\/h1>\n<p>\u7b2c(1)(2)(5)\u79cd\u65b9\u5f0f\u662f\u6574\u4f53\u6e050\u4e86\u6574\u4e2a\u7f13\u51b2\u533a\uff0c\u6548\u7387\u8f83\u4f4e\uff1b<br \/> \u5982\u679c\u6570\u7ec4\u7684size\u975e\u5e38\u5927\uff0c\u90a3\u4e48\u8fd9\u4e09\u79cd\u65b9\u5f0f\u5c06\u4f1a\u9020\u6210\u5f88\u5927\u7684\u5f00\u9500\u3002<\/p>\n<p>\u800c\u7b2c(3)\u548c\u7b2c(4)\u79cd\u65b9\u5f0f\u662f\u53ea\u5c06str\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u521d\u59cb\u5316\u4e3a0\uff0c\u6548\u7387\u9ad8\uff1b<\/p>\n<h1>3. \u7ed3\u8bba<\/h1>\n<ol>\n<li>\u6548\u7387\u9ad8\uff0c\u4f7f\u75283\u30014\u521d\u59cb\u5316\uff1b<\/li>\n<li>\u89c4\u8303\uff0c\u5efa\u8bae\u4f7f\u75285\u521d\u59cb\u5316\uff08memset\uff09<br \/> \u56e0\u4e3a\u6709\u8fc7\u75283\/4\u7684\u65b9\u5f0f\u521d\u59cb\u5316\uff0c\u5bfc\u81f4\u540e\u9762\u5b57\u7b26\u672a\u521d\u59cb\u5316\uff0c\u800c\u662f\u968f\u673a\u503c\uff0c\u6b63\u597d\u4f7f\u7528\u4e86\u8fd9\u4e9b\u503c\uff0c\u6253\u5370\u51fa\u6765\u4e5f\u662f\u4e71\u7801\u5bfc\u81f4\u3002<\/li>\n<\/ol>\n<h1>4. \u6269\u5c55\uff1a<\/h1>\n<h2>4.1 \u4e0d\u4f7f\u7528 szName[0] = \u20180\u2019\uff0c\u4f7f\u7528szName[0] = 0<\/h2>\n<pre class=\"language-java prettyprint linenums\"><code>szName[0] = '0' ;        \/\/ Warning 4195\nPossible confuse  digit '0'  or  zero-terminate '\\0'  or  letter 'O'\n\/\/\u6df7\u6dc6\u6570\u5b570 \u548c \u5b57\u7b26\u4e32\u7ed3\u5c3e\u5b57\u7b26 \\0 \uff0c\u5efa\u8bae\u76f4\u63a5\u4f7f\u7528 0 \u5373\u53ef\n<\/code><\/pre>\n<h2>4.2 \u7a7a\u5b57\u7b26\u4e32\u5224\u65ad<\/h2>\n<p>\u63a8\u8350\u7528\u6cd5\uff1a<\/p>\n<pre class=\"language-java prettyprint linenums\"><code>if (0 != pcUserName[0])          \/\/  \u63a8\u8350\uff1a\u5b89\u5168 \u53ef\u9760\n<\/code><\/pre>\n<p>\u9519\u8bef\u7528\u6cd5\uff1a<\/p>\n<pre class=\"language-java prettyprint linenums\"><code>if (0 == strlen(pcUserName))\n\tWarning 4170 Function 'strlen' is unnecessary or duplicate\n\nif('0' == pcUserName[0])\n\u540c\u4e0a\nPossible confuse  digit '0'  or  zero-terminate '\\0'  or  letter 'O'\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5b57\u7b26\u6570\u7ec4\u521d\u59cb\u5316\u4e3a\u7a7a\u5b57\u7b26\u6570\u7ec4\u521d\u59cb\u5316\u4e3a\u7a7a1.\u603b\u7ed3\u8d77\u6765\u6709\u4ee5\u4e0b\u4e09\u79cd\u65b9\u5f0f\uff1a2.\u5206\u67903.\u7ed3\u8bba1.\u603b\u7ed3\u8d77\u6765\u6709\u4ee5\u4e0b\u4e09\u79cd\u65b9\u5f0f\uff1a(1)charstr[10]=\"\"...","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[82],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/324"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=324"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/324\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}