{"id":3910,"date":"2024-03-13T07:40:29","date_gmt":"2024-03-13T07:40:29","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-solve-the-c-narcissistic-number-problem\/"},"modified":"2025-07-30T22:46:54","modified_gmt":"2025-07-30T22:46:54","slug":"how-to-solve-the-c-narcissistic-number-problem","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-solve-the-c-narcissistic-number-problem\/","title":{"rendered":"C++ Armstrong Number Solution Guide"},"content":{"rendered":"<p>A narcissistic number is an n-digit number that equals the sum of each digit raised to the nth power. For example, 153 is a narcissistic number because 1^3 + 5^3 + 3^3 = 153.<\/p>\n<p>To solve the Armstrong number problem in C++, one can write a program to loop through all possible n-digit numbers, then calculate the sum of the nth powers of its digits, and finally determine if it equals the original number.<\/p>\n<p>Here is a simple C++ program example to solve the Armstrong number problem:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;cmath&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span> <\/span>{\r\n    <span class=\"hljs-type\">int<\/span> num, sum, temp, digit;\r\n\r\n    std::cout &lt;&lt; <span class=\"hljs-string\">\"\u6c34\u4ed9\u82b1\u6570\u6709\uff1a\\n\"<\/span>;\r\n    <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> i = <span class=\"hljs-number\">100<\/span>; i &lt; <span class=\"hljs-number\">1000<\/span>; i++) {\r\n        num = i;\r\n        sum = <span class=\"hljs-number\">0<\/span>;\r\n\r\n        <span class=\"hljs-keyword\">while<\/span> (num &gt; <span class=\"hljs-number\">0<\/span>) {\r\n            digit = num % <span class=\"hljs-number\">10<\/span>;\r\n            sum += <span class=\"hljs-built_in\">pow<\/span>(digit, <span class=\"hljs-number\">3<\/span>);\r\n            num \/= <span class=\"hljs-number\">10<\/span>;\r\n        }\r\n\r\n        <span class=\"hljs-keyword\">if<\/span> (sum == i) {\r\n            std::cout &lt;&lt; i &lt;&lt; <span class=\"hljs-string\">\" \"<\/span>;\r\n        }\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>This program will output all 3-digit narcissistic numbers. You can also adjust the range of the loop to search for narcissistic numbers of other digits as needed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A narcissistic number is an n-digit number that equals the sum of each digit raised to the nth power. For example, 153 is a narcissistic number because 1^3 + 5^3 + 3^3 = 153. To solve the Armstrong number problem in C++, one can write a program to loop through all possible n-digit numbers, then [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[2879,274,2880,2881,1902],"class_list":["post-3910","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-armstrong-number","tag-c","tag-narcissistic-number","tag-number-algorithms","tag-programming-tutorials"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C++ Armstrong Number Solution Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn to solve the Armstrong number problem in C++. Step-by-step guide with code examples to find narcissistic numbers efficiently.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-solve-the-c-narcissistic-number-problem\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++ Armstrong Number Solution Guide\" \/>\n<meta property=\"og:description\" content=\"Learn to solve the Armstrong number problem in C++. 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