{"id":21314,"date":"2022-11-13T01:08:42","date_gmt":"2022-11-12T19:38:42","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-invert-7th-bit-of-hex-string-c-duplicate\/"},"modified":"2022-11-13T01:08:42","modified_gmt":"2022-11-12T19:38:42","slug":"solved-invert-7th-bit-of-hex-string-c-duplicate","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-invert-7th-bit-of-hex-string-c-duplicate\/","title":{"rendered":"[Solved] Invert 7th bit of hex string C++ [duplicate]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-13453625\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"13453625\" data-parentid=\"13453524\" data-score=\"0\" data-position-on-page=\"2\" data-highest-scored=\"0\" data-question-has-accepted-highest-score=\"0\" itemprop=\"suggestedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<pre><code>#include &lt;stdio.h&gt;\n\nvoid flipme(char *buf, const char *inBuf)\n{\n    int x;\n    sscanf(inBuf, \"%x\", &amp;x);\n    x ^= 1 &lt;&lt; 17;\n    sprintf(buf, \"%06X\", x);\n}\n\nint main(void)\n{\n    char buf[16];\n\n    flipme(buf, \"002A05\");\n    printf(\"002A05-&gt;%s\\n\", buf);\n\n    flipme(buf, \"ABCDEF\");\n    printf(\"ABCDEF-&gt;%s\\n\", buf);\n}\n<\/code><\/pre>\n<p>Output:<\/p>\n<blockquote>\n<p>002A05-&gt;022A05<br \/>\n  ABCDEF-&gt;A9CDEF<\/p>\n<\/blockquote>\n<p>You wrote:<\/p>\n<blockquote>\n<p>I tried converting hex string to integer via strtol, but that function strip leading zeros.<\/p>\n<\/blockquote>\n<p>The <code>strtol<\/code> function converts it to a <em>number<\/em>. It doesn&#8217;t mean anything to say it strips leading zeroes because numbers don&#8217;t have leading zeroes &#8212; &#8220;6&#8221; and &#8220;06&#8221; are two different ways of writing the same number. If you want leading zeroes when you print it, you can add them then.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">6<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Invert 7th bit of hex string C++ [duplicate] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] #include &lt;stdio.h&gt; void flipme(char *buf, const char *inBuf) { int x; sscanf(inBuf, &#8220;%x&#8221;, &amp;x); x ^= 1 &lt;&lt; 17; sprintf(buf, &#8220;%06X&#8221;, x); } int main(void) { char buf[16]; flipme(buf, &#8220;002A05&#8221;); printf(&#8220;002A05-&gt;%s\\n&#8221;, buf); flipme(buf, &#8220;ABCDEF&#8221;); printf(&#8220;ABCDEF-&gt;%s\\n&#8221;, buf); } Output: 002A05-&gt;022A05 ABCDEF-&gt;A9CDEF You wrote: I tried converting hex string to integer via strtol, but that function &#8230; <a title=\"[Solved] Invert 7th bit of hex string C++ [duplicate]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-invert-7th-bit-of-hex-string-c-duplicate\/\" aria-label=\"More on [Solved] Invert 7th bit of hex string C++ [duplicate]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[679,324,633],"class_list":["post-21314","post","type-post","status-publish","format-standard","hentry","category-solved","tag-binary","tag-c","tag-hex"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Invert 7th bit of hex string C++ [duplicate] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-invert-7th-bit-of-hex-string-c-duplicate\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Invert 7th bit of hex string C++ [duplicate] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] #include &lt;stdio.h&gt; void flipme(char *buf, const char *inBuf) { int x; sscanf(inBuf, &quot;%x&quot;, &amp;x); x ^= 1 &lt;&lt; 17; sprintf(buf, &quot;%06X&quot;, x); } int main(void) { char buf[16]; flipme(buf, &quot;002A05&quot;); printf(&quot;002A05-&gt;%sn&quot;, buf); flipme(buf, &quot;ABCDEF&quot;); printf(&quot;ABCDEF-&gt;%sn&quot;, buf); } Output: 002A05-&gt;022A05 ABCDEF-&gt;A9CDEF You wrote: I tried converting hex string to integer via strtol, but that function ... 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void flipme(char *buf, const char *inBuf) { int x; sscanf(inBuf, \"%x\", &amp;x); x ^= 1 &lt;&lt; 17; sprintf(buf, \"%06X\", x); } int main(void) { char buf[16]; flipme(buf, \"002A05\"); printf(\"002A05-&gt;%sn\", buf); flipme(buf, \"ABCDEF\"); printf(\"ABCDEF-&gt;%sn\", buf); } Output: 002A05-&gt;022A05 ABCDEF-&gt;A9CDEF You wrote: I tried converting hex string to integer via strtol, but that function ... 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