{"id":18322,"date":"2024-03-15T16:42:06","date_gmt":"2024-03-15T16:42:06","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-call-a-file-in-the-c-language\/"},"modified":"2024-03-21T13:01:56","modified_gmt":"2024-03-21T13:01:56","slug":"how-to-call-a-file-in-the-c-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-call-a-file-in-the-c-language\/","title":{"rendered":"How to call a file in the C language?"},"content":{"rendered":"

C language can call a file through the following steps:<\/p>\n

    \n
  1. Open file<\/li>\n
  2. Document<\/li>\n<\/ol>\n
    FILE *file = fopen(\"filename.txt\"<\/span>, \"r\"<\/span>);\r\n<\/code><\/pre>\n
      \n
    1. read an input from a file in C<\/li>\n
    2. write in a specific format<\/li>\n
    3. input data<\/li>\n
    4. print or display<\/li>\n<\/ol>\n
      int<\/span> number;\r\nfscanf<\/span>(file, \"%d\"<\/span>, &number);\r\n<\/code><\/pre>\n
      int<\/span> number = 42<\/span>;\r\nfprintf<\/span>(file, \"%d\"<\/span>, number);\r\n<\/code><\/pre>\n
        \n
      1. Close the file.<\/li>\n<\/ol>\n
        fclose(file);\r\n<\/code><\/pre>\n
        It is important to note that before using a file, you should check if the file has been successfully opened and if any errors occurred while operating the file. You can use the feof function to check if the file has reached its end, or use the ferror function to check for errors. Example code is as follows:<\/p>\n
        if<\/span> (file == NULL<\/span>) {\r\n    printf<\/span>(\"\u6587\u4ef6\u6253\u5f00\u5931\u8d25\\n\"<\/span>);\r\n    return<\/span> -1<\/span>;\r\n}\r\n\r\nif<\/span> (ferror(file)) {\r\n    printf<\/span>(\"\u6587\u4ef6\u64cd\u4f5c\u9519\u8bef\\n\"<\/span>);\r\n    return<\/span> -1<\/span>;\r\n}\r\n\r\nif<\/span> (feof(file)) {\r\n    printf<\/span>(\"\u6587\u4ef6\u5df2\u5230\u8fbe\u672b\u5c3e\\n\"<\/span>);\r\n}\r\n<\/code><\/pre>\n
        The above are basic file operation steps, which can be adjusted and expanded according to specific needs.<\/p>\n","protected":false},"excerpt":{"rendered":"
        C language can call a file through the following steps: Open file Document FILE *file = fopen(“filename.txt”, “r”); read an input from a file in C write in a specific format input data print or display int number; fscanf(file, “%d”, &number); int number = 42; fprintf(file, “%d”, number); Close the file. fclose(file); It is important […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-18322","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nHow to call a file in the C language? - Blog - Silicon Cloud<\/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:\/\/www.silicloud.com\/blog\/how-to-call-a-file-in-the-c-language\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to call a file in the C language?\" \/>\n<meta property=\"og:description\" content=\"C language can call a file through the following steps: Open file Document FILE *file = fopen("filename.txt", "r"); read an input from a file in C write in a specific format input data print or display int number; fscanf(file, "%d", &number); int number = 42; fprintf(file, "%d", number); Close the file. fclose(file); It is important […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-call-a-file-in-the-c-language\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T16:42:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-21T13:01:56+00:00\" \/>\n<meta name=\"author\" content=\"Olivia Parker\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Olivia Parker\" \/>\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:\/\/www.silicloud.com\/blog\/how-to-call-a-file-in-the-c-language\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-call-a-file-in-the-c-language\/\"},\"author\":{\"name\":\"Olivia Parker\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3ff7b3da0e45ac5dbbef2502f3cea8d9\"},\"headline\":\"How to call a file in the C language?\",\"datePublished\":\"2024-03-15T16:42:06+00:00\",\"dateModified\":\"2024-03-21T13:01:56+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-call-a-file-in-the-c-language\/\"},\"wordCount\":118,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-call-a-file-in-the-c-language\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-call-a-file-in-the-c-language\/\",\"name\":\"How to call a file in the C language? 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