{"id":5723,"date":"2022-08-30T06:36:41","date_gmt":"2022-08-30T01:06:41","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-c-why-its-return-me-null-value-every-time\/"},"modified":"2022-08-30T06:36:41","modified_gmt":"2022-08-30T01:06:41","slug":"solved-c-why-its-return-me-null-value-every-time","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-c-why-its-return-me-null-value-every-time\/","title":{"rendered":"[Solved] C – why it’s return me NULL value every-time?"},"content":{"rendered":"

[ad_1]
\n<\/p>\n

\n
\n
<\/div>\n
\n
\n

you call ft_strstr(\"Bonjour\", \"jour\");<\/code><\/p>\n

ft_strstr calls ft_memcmp(\"onjour\", \"jour\")<\/code>.<\/p>\n

ft_memcmp returns ‘o’ – ‘j’, which is not zero, so <\/p>\n

return (!ft_memcmp(++s1, s2, ft_strlen(s2)) ? s1 : NULL);<\/code> returns NULL<\/code><\/p>\n

your problem is ft_strstr<\/code> : <\/p>\n

I suppose you wanted to do it recursively ? If it is the case, you forgot the recursion<\/p>\n

Here’s an example of a recursive implementation which should work.<\/p>\n

char *ft_strstr(char *s1, char const *s2)
\n{
\n if (!*s1)
\n return (NULL);
\n if (!ft_memcmp(s1, s2, ft_strlen(s2)))
\n return (s1);
\n return (ft_strstr(s1 + 1, s2));
\n}
\n<\/code><\/p>\n<\/p><\/div>\n

<\/div>\n<\/div>\n

<\/span> <\/p><\/div>\n<\/div>\n

[ad_2]<\/p>\n

solved C – why it’s return me NULL value every-time? <\/p>\n","protected":false},"excerpt":{"rendered":"

[ad_1] you call ft_strstr(“Bonjour”, “jour”); ft_strstr calls ft_memcmp(“onjour”, “jour”). ft_memcmp returns ‘o’ – ‘j’, which is not zero, so return (!ft_memcmp(++s1, s2, ft_strlen(s2)) ? s1 : NULL); returns NULL your problem is ft_strstr : I suppose you wanted to do it recursively ? If it is the case, you forgot the recursion Here’s an example … 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":[324],"class_list":["post-5723","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c"],"yoast_head":"\n[Solved] C - why it's return me NULL value every-time? - 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-c-why-its-return-me-null-value-every-time\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] C - why it's return me NULL value every-time? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] you call ft_strstr("Bonjour", "jour"); ft_strstr calls ft_memcmp("onjour", "jour"). ft_memcmp returns ‘o’ – ‘j’, which is not zero, so return (!ft_memcmp(++s1, s2, ft_strlen(s2)) ? s1 : NULL); returns NULL your problem is ft_strstr : I suppose you wanted to do it recursively ? If it is the case, you forgot the recursion Here’s an example ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-c-why-its-return-me-null-value-every-time\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-08-30T01:06:41+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-c-why-its-return-me-null-value-every-time\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-c-why-its-return-me-null-value-every-time\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] C – why it’s return me NULL value every-time?\",\"datePublished\":\"2022-08-30T01:06:41+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-c-why-its-return-me-null-value-every-time\/\"},\"wordCount\":72,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"c++\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-c-why-its-return-me-null-value-every-time\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-c-why-its-return-me-null-value-every-time\/\",\"name\":\"[Solved] C - why it's return me NULL value every-time? 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If it is the case, you forgot the recursion Here’s an example ... 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