{"id":14657,"date":"2024-03-15T09:42:02","date_gmt":"2024-03-15T09:42:02","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-read-data-from-a-file-in-the-c-language\/"},"modified":"2025-08-06T11:40:56","modified_gmt":"2025-08-06T11:40:56","slug":"how-to-read-data-from-a-file-in-the-c-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-read-data-from-a-file-in-the-c-language\/","title":{"rendered":"Read File in C: Code Examples with fread & fgets"},"content":{"rendered":"

\nIn C language, one can use the standard library functions fread() or fgets() to read data from a file. Here are two common methods for reading data from a file:<\/p>\n

    \n
  1. Reads a file in C programming.<\/li>\n<\/ol>\n
    #include<\/span> <stdio.h><\/span><\/span>\r\n\r\nint<\/span> main<\/span>()<\/span> {\r\n   FILE *fp;\r\n   int<\/span> data[100<\/span>];\r\n\r\n   \/\/ \u6253\u5f00\u6587\u4ef6<\/span>\r\n   fp = fopen(\"data.txt\"<\/span>, \"rb\"<\/span>);\r\n\r\n   \/\/ \u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e<\/span>\r\n   fread(data, sizeof<\/span>(int<\/span>), 100<\/span>, fp);\r\n\r\n   \/\/ \u5173\u95ed\u6587\u4ef6<\/span>\r\n   fclose(fp);\r\n\r\n   return<\/span> 0<\/span>;\r\n}\r\n<\/code><\/pre>\n
      \n
    1. read user input<\/li>\n<\/ol>\n
      #include<\/span> <stdio.h><\/span><\/span>\r\n\r\nint<\/span> main<\/span>()<\/span> {\r\n   FILE *fp;\r\n   char<\/span> buffer[255<\/span>];\r\n\r\n   \/\/ \u6253\u5f00\u6587\u4ef6<\/span>\r\n   fp = fopen(\"data.txt\"<\/span>, \"r\"<\/span>);\r\n\r\n   \/\/ \u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e<\/span>\r\n   while<\/span> (fgets(buffer, sizeof<\/span>(buffer), fp)) {\r\n      \/\/ \u5904\u7406\u6bcf\u884c\u6570\u636e<\/span>\r\n      printf<\/span>(\"%s\"<\/span>, buffer);\r\n   }\r\n\r\n   \/\/ \u5173\u95ed\u6587\u4ef6<\/span>\r\n   fclose(fp);\r\n\r\n   return<\/span> 0<\/span>;\r\n}\r\n<\/code><\/pre>\n
      In the examples above, data.txt is the name of the file to be read. In the first example, the fread() function will read 100 int type data consecutively into the array called “data”. In the second example, the fgets() function will read the data in the file line by line, reading one line at a time until the end of the file.<\/p>\n","protected":false},"excerpt":{"rendered":"
      In C language, one can use the standard library functions fread() or fgets() to read data from a file. Here are two common methods for reading data from a file: Reads a file in C programming. #include <stdio.h> int main() { FILE *fp; int data[100]; \/\/ \u6253\u5f00\u6587\u4ef6 fp = fopen(“data.txt”, “rb”); \/\/ \u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e fread(data, sizeof(int), […]<\/p>\n","protected":false},"author":7,"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":[7132,3435,11273,19797,19796],"class_list":["post-14657","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-file-i-o","tag-c-programming-basics","tag-c-file-reading","tag-fgets-in-c","tag-fread-in-c"],"yoast_head":"\nRead File in C: Code Examples with fread & fgets - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn efficient C file reading methods using fread() and fgets(). 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