![\"Substring](\"https:\/\/www.wikitechy.com\/technology\/wp-content\/uploads\/2017\/05\/substring-c.png\")
<\/p>\n
We create a function and pass it four arguments original string array, substring array, position and length of desired substring. As call by reference is used we do not need to return substring array. See another code below in which we return pointer to substring, which we create in our array using dynamic memory allocation.<\/p>\n[ad type=”banner”]\n[pastacode lang=”c” manual=”%23include%20%3Cstdio.h%3E%0A%20%0Avoid%20substring(char%20%5B%5D%2C%20char%5B%5D%2C%20int%2C%20int)%3B%0A%20%0Aint%20main()%20%0A%7B%0A%20%20%20char%20string%5B1000%5D%2C%20sub%5B1000%5D%3B%0A%20%20%20int%20position%2C%20length%2C%20c%20%3D%200%3B%0A%20%0A%20%20%20printf(%22Input%20a%20string%5Cn%22)%3B%0A%20%20%20gets(string)%3B%0A%20%0A%20%20%20printf(%22Enter%20the%20position%20and%20length%20of%20substring%5Cn%22)%3B%0A%20%20%20scanf(%22%25d%25d%22%2C%20%26position%2C%20%26length)%3B%0A%20%0A%20%20%20substring(string%2C%20sub%2C%20position%2C%20length)%3B%0A%20%0A%20%20%20printf(%22Required%20substring%20is%20%5C%22%25s%5C%22%5Cn%22%2C%20sub)%3B%0A%20%0A%20%20%20return%200%3B%0A%7D%0A%20%0Avoid%20substring(char%20s%5B%5D%2C%20char%20sub%5B%5D%2C%20int%20p%2C%20int%20l)%20%7B%0A%20%20%20int%20c%20%3D%200%3B%0A%20%0A%20%20%20while%20(c%20%3C%20l)%20%7B%0A%20%20%20%20%20%20sub%5Bc%5D%20%3D%20s%5Bp%2Bc-1%5D%3B%0A%20%20%20%20%20%20c%2B%2B%3B%0A%20%20%20%7D%0A%20%20%20sub%5Bc%5D%20%3D%20’%5C0’%3B%0A%7D” message=”” highlight=”” provider=”manual”\/]\n
C substring program using pointers<\/h2>\n[pastacode lang=”c” manual=”%23include%20%3Cstdio.h%3E%0A%23include%20%3Cstdlib.h%3E%0A%20%0Achar*%20substring(char*%2C%20int%2C%20int)%3B%0A%20%0Aint%20main()%20%0A%7B%0A%20%20%20char%20string%5B100%5D%2C%20*pointer%3B%0A%20%20%20int%20position%2C%20length%3B%0A%20%0A%20%20%20printf(%22Input%20a%20string%5Cn%22)%3B%0A%20%20%20gets(string)%3B%0A%20%0A%20%20%20printf(%22Enter%20the%20position%20and%20length%20of%20substring%5Cn%22)%3B%0A%20%20%20scanf(%22%25d%25d%22%2C%26position%2C%20%26length)%3B%0A%20%0A%20%20%20pointer%20%3D%20substring(%20string%2C%20position%2C%20length)%3B%0A%20%0A%20%20%20printf(%22Required%20substring%20is%20%5C%22%25s%5C%22%5Cn%22%2C%20pointer)%3B%0A%20%0A%20%20%20free(pointer)%3B%0A%20%0A%20%20%20return%200%3B%0A%7D%0A%20%0A%2F*C%20substring%20function%3A%20It%20returns%20a%20pointer%20to%20the%20substring%20*%2F%0A%20%0Achar%20*substring(char%20*string%2C%20int%20position%2C%20int%20length)%20%0A%7B%0A%20%20%20char%20*pointer%3B%0A%20%20%20int%20c%3B%0A%20%0A%20%20%20pointer%20%3D%20malloc(length%2B1)%3B%0A%20%0A%20%20%20if%20(pointer%20%3D%3D%20NULL)%0A%20%20%20%7B%0A%20%20%20%20%20%20printf(%22Unable%20to%20allocate%20memory.%5Cn%22)%3B%0A%20%20%20%20%20%20exit(1)%3B%0A%20%20%20%7D%0A%20%0A%20%20%20for%20(c%20%3D%200%20%3B%20c%20%3C%20length%20%3B%20c%2B%2B)%0A%20%20%20%7B%0A%20%20%20%20%20%20*(pointer%2Bc)%20%3D%20*(string%2Bposition-1)%3B%20%20%20%20%20%20%0A%20%20%20%20%20%20string%2B%2B%3B%20%20%20%0A%20%20%20%7D%0A%20%0A%20%20%20*(pointer%2Bc)%20%3D%20’%5C0’%3B%0A%20%0A%20%20%20return%20pointer%3B%0A%7D” message=”” highlight=”” provider=”manual”\/]\n[ad type=”banner”]\nC code for all substrings of a string<\/span><\/h2>\n[pastacode lang=”c” manual=”%23include%20%3Cstdio.h%3E%0A%23include%20%3Cstring.h%3E%0A%23include%20%3Cmalloc.h%3E%0A%20%0Achar*%20substring(char*%2C%20int%2C%20int)%3B%0A%20%0Aint%20main()%20%0A%7B%0A%20%20%20char%20string%5B100%5D%2C%20*pointer%3B%0A%20%20%20int%20position%20%3D%201%2C%20length%20%3D%201%2C%20temp%2C%20string_length%3B%0A%20%0A%20%20%20printf(%22Enter%20a%20string%5Cn%22)%3B%0A%20%20%20gets(string)%3B%0A%20%0A%20%20%20temp%20%3D%20string_length%20%3D%20strlen(string)%3B%0A%20%0A%20%20%20printf(%22Substring%20of%20%5C%22%25s%5C%22%20are%5Cn%22%2C%20string)%3B%0A%20%0A%20%20%20while%20(position%20%3C%3D%20string_length)%0A%20%20%20%7B%0A%20%20%20%20%20%20while%20(length%20%3C%3D%20temp)%0A%20%20%20%20%20%20%7B%0A%20%20%20%20%20%20%20%20%20pointer%20%3D%20substring(string%2C%20position%2C%20length)%3B%0A%20%20%20%20%20%20%20%20%20printf(%22%25s%5Cn%22%2C%20pointer)%3B%0A%20%20%20%20%20%20%20%20%20free(pointer)%3B%0A%20%20%20%20%20%20%20%20%20length%2B%2B%3B%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20temp–%3B%0A%20%20%20%20%20%20position%2B%2B%3B%0A%20%20%20%20%20%20length%20%3D%201%3B%0A%20%20%20%7D%0A%20%0A%20%20%20return%200%3B%0A%7D%0A%20″ message=”” highlight=”” provider=”manual”\/]\nOutput:<\/strong><\/p>\n![\"Substring](\"https:\/\/www.wikitechy.com\/technology\/wp-content\/uploads\/2017\/05\/all-substrings-c.png\")
<\/p>\n","protected":false},"excerpt":{"rendered":"
Substring in c programming – C Programming – c programming code to find a substring from a given string and for all substrings of a string.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[69866,1],"tags":[72833,73202,79199,79202,79205,7378,72827,73163,73158,73164,74701,79210,79209,79206,79204,79201,79208,74702,79203,73157,73201,79196,74704,79200,73160,79207],"class_list":["post-26584","post","type-post","status-publish","format-standard","hentry","category-c-programming","category-coding","tag-c-array-of-strings","tag-c-compare-strings","tag-c-program-to-find-substring-in-a-string","tag-c-program-to-find-substring-in-a-string-using-pointers","tag-c-program-to-find-substring-of-string-using-library-function","tag-c-string","tag-c-string-array","tag-c-string-compare","tag-c-string-functions","tag-c-string-h","tag-c-string-to-int","tag-char-to-string","tag-control-string-in-c-programming","tag-extract-substring-from-string-in-c","tag-how-to-find-substring-in-c-using-library-functions","tag-how-to-find-substring-in-c-without-using-library-functions","tag-how-to-use-string-in-c-programming","tag-int-to-string-c","tag-program-to-find-substring-in-a-string-in-java","tag-string-c","tag-string-compare-c","tag-string-in-c-programming","tag-string-to-int-c","tag-substring-function-in-c","tag-the-c-string","tag-what-is-string-in-c-programming"],"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/26584","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/comments?post=26584"}],"version-history":[{"count":0,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/26584\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/media?parent=26584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/categories?post=26584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/tags?post=26584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Output:<\/strong><\/p>\n Substring in c programming – C Programming – c programming code to find a substring from a given string and for all substrings of a string.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[69866,1],"tags":[72833,73202,79199,79202,79205,7378,72827,73163,73158,73164,74701,79210,79209,79206,79204,79201,79208,74702,79203,73157,73201,79196,74704,79200,73160,79207],"class_list":["post-26584","post","type-post","status-publish","format-standard","hentry","category-c-programming","category-coding","tag-c-array-of-strings","tag-c-compare-strings","tag-c-program-to-find-substring-in-a-string","tag-c-program-to-find-substring-in-a-string-using-pointers","tag-c-program-to-find-substring-of-string-using-library-function","tag-c-string","tag-c-string-array","tag-c-string-compare","tag-c-string-functions","tag-c-string-h","tag-c-string-to-int","tag-char-to-string","tag-control-string-in-c-programming","tag-extract-substring-from-string-in-c","tag-how-to-find-substring-in-c-using-library-functions","tag-how-to-find-substring-in-c-without-using-library-functions","tag-how-to-use-string-in-c-programming","tag-int-to-string-c","tag-program-to-find-substring-in-a-string-in-java","tag-string-c","tag-string-compare-c","tag-string-in-c-programming","tag-string-to-int-c","tag-substring-function-in-c","tag-the-c-string","tag-what-is-string-in-c-programming"],"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/26584","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/comments?post=26584"}],"version-history":[{"count":0,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/26584\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/media?parent=26584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/categories?post=26584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/tags?post=26584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/p>\n","protected":false},"excerpt":{"rendered":"