{"id":146844,"date":"2025-09-15T12:36:30","date_gmt":"2025-09-15T07:06:30","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=146844"},"modified":"2025-09-15T12:36:30","modified_gmt":"2025-09-15T07:06:30","slug":"infix-to-postfix-conversion-in-dsa-cpp","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/infix-to-postfix-conversion-in-dsa-cpp\/","title":{"rendered":"Infix to Postfix Conversion in DSA C++"},"content":{"rendered":"<h3>Program 1<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">\/\/ Program to Convert infix to Postfix\r\n#include&lt;iostream&gt;\r\n#include&lt;ctype.h&gt;\r\n#define clrscr() system(\"cls\")\r\nusing namespace std;\r\n\r\nchar stack[50];\r\nint top = -1;\r\n\r\nvoid push(char ch)\r\n{\r\n    stack[++top] = ch;\r\n}\r\n\r\nchar pop()\r\n{\r\n    if(top == -1)\r\n        return -1;\r\n    else\r\n        return stack[top--];\r\n}\r\n\r\nint priority(char ch)\r\n{\r\n    if(ch == '(')\r\n        return 0;\r\n    if(ch == '+' || ch == '-')\r\n        return 1;\r\n    if(ch == '*' || ch == '\/')\r\n        return 2;\r\n    return 0;\r\n}\r\n\r\nint main()\r\n{\r\n    char expr[50];\r\n    char *p, x;\r\n    cout&lt;&lt;\"Enter the expression : \";\r\n    cin&gt;&gt;expr;\r\n    cout&lt;&lt;endl;\r\n    p = expr;\r\n    \r\n    while(*p != '\\0')\r\n    {\r\n        if(isalnum(*p))\r\n             cout&lt;&lt;*p;\r\n        else if(*p == '(')\r\n            push(*p);\r\n        else if(*p == ')')\r\n        {\r\n            while((x = pop()) != '(')\r\n                cout&lt;&lt;x;\r\n        }\r\n        else\r\n        {\r\n            while(priority(stack[top]) &gt;= priority(*p))\r\n                cout&lt;&lt;pop();\r\n            push(*p);\r\n        }\r\n        p++;\r\n    }\r\n    \r\n    while(top != -1)\r\n    {\r\n        cout&lt;&lt;pop();\r\n    }\r\n    return 0;\r\n}<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Program 1 \/\/ Program to Convert infix to Postfix #include&lt;iostream&gt; #include&lt;ctype.h&gt; #define clrscr() system(&#8220;cls&#8221;) using namespace std; char stack[50]; int top = -1; void push(char ch) { stack[++top] = ch; } char pop() {&#46;&#46;&#46;<\/p>\n","protected":false},"author":581,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31449],"tags":[35277,35274,32874,32869,32870,24489,35275,35276],"class_list":["post-146844","post","type-post","status-publish","format-standard","hentry","category-dsa-cpp-tutorials","tag-convert-infix-to-postfix","tag-convert-infix-to-postfix-in-dsa-c","tag-dsa-c","tag-dsa-c-practical","tag-dsa-c-program","tag-infix-to-postfix-conversion","tag-infix-to-postfix-conversion-in-dsa-c","tag-infix-to-postfix-conversion-using-stack"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Infix to Postfix Conversion in DSA C++ - DataFlair<\/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:\/\/data-flair.training\/blogs\/infix-to-postfix-conversion-in-dsa-cpp\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Infix to Postfix Conversion in DSA C++ - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Program 1 \/\/ Program to Convert infix to Postfix #include&lt;iostream&gt; #include&lt;ctype.h&gt; #define clrscr() system(&quot;cls&quot;) using namespace std; char stack[50]; int top = -1; void push(char ch) { stack[++top] = ch; } char pop() {&#046;&#046;&#046;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/data-flair.training\/blogs\/infix-to-postfix-conversion-in-dsa-cpp\/\" \/>\n<meta property=\"og:site_name\" content=\"DataFlair\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/DataFlairWS\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-15T07:06:30+00:00\" \/>\n<meta name=\"author\" content=\"DataFlair Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:site\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"DataFlair Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Infix to Postfix Conversion in DSA C++ - DataFlair","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/data-flair.training\/blogs\/infix-to-postfix-conversion-in-dsa-cpp\/","og_locale":"en_US","og_type":"article","og_title":"Infix to Postfix Conversion in DSA C++ - DataFlair","og_description":"Program 1 \/\/ Program to Convert infix to Postfix #include&lt;iostream&gt; 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