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Open, read, write and close a text file, block by block using fopen()/fopen_s(), fread() and fwrite() C functions. Compiler: Visual C++ Express Edition 2005.For details on how fopen() determines the type of file from the filename and mode strings, see the topics about opening files in z/OS XL C/C++ Programming 2 Oct 2014 10 Sep 2013 About Us; Search. Home » C Programming Tutorial » Basics of File Handling in C On Success fopen() function returns a pointer to the structure of type FILE . 20 May 2009 create, read & write text files in C? Where can i find a tutorial or a guide? FILE *file = fopen ( filename, "r" ); if ( file != NULL ) { char line [ 128 ]; In this tutorial, you'll learn how to do file IO, text and binary, in C, using fopen, fwrite, and This code will open test.txt for reading in text mode. . C++ file IO You need to post your code that illustrates your problem. Jim Do i need to type the entire file path when naming the file in the fopen function? 2 Nov 2014 22 May 2017 You need to use an array to create the file name using sprintf and use the array in the call to fopen . int main(void) { char filename[100]; // Make the array large