As for the historical basis for Undefined Behavior, I would say that the issue isn't just with hardware platforms.

By default, the driver converts a Control-Dcharacter at the start of a line into an end-of-file indicator. The function feof() is checking again that pointer has reached to the end of file or not. We will read text from the file character by character and display it on the output screen. -- Reads and writes one character at a time with Ada.Text_IO; use Ada.Text_IO; procedure eofloop3b is c: Character; begin while (not End_Of_File) loop get(c); put(c); -- Move output to new line as needed if End_Of_Line then new_line; end if; end loop; end eofloop3b; -- Reads and writes one character at a time with Ada.Text_IO; use Ada.Text_IO; procedure eofloop3b is c: Character; begin while (not End_Of_File) loop get(c); put(c); -- Move output to new line as needed if End_Of_Line then new_line; end if; end loop; end eofloop3b; site design / logo © 2020 Stack Exchange Inc; user contributions licensed under EOF stands for End of File. Actually, you do not place the null character at the end of a string constant. It doesn't close the input stream; it merely causes any fread() which is blocking on the console to return immediately with any as-yet-unread data. Stack Exchange network consists of 177 Q&A communities including It is used as the value returned by several functions in header to indicate that the End-of-File has been reached or to signal some other failure conditions. Anybody can ask a question This C program will help you to understand the same.Within this C fputc function example, First, we created the File pointer and then assigned the file in write mode. Generating an EOF condition! Within this C fputc function example, First, we created the File pointer and then assigned the file in write mode. Since the Standard requires that implementations either yield a consistent mapping or consistently raise a signal, the only platforms where the Standard would leave room for something other than two's-complement reduction would be things like DSPs with saturating-arithmetic hardware. Please refer to fputs function article.. Detailed answers to any questions you might have You're looking for '\0', which marks the end of a string, but not a line in a text file. This code is likely to fail if you read a character with the value @delnan: The linked article isn't quite right about how Unix treats control-D.

Software Engineering Stack Exchange works best with JavaScript enabled EOF marks the End-Of-File. TIP: In this C program, we haven’t mentioned the full path of file name because my.c application and the text file reside in the same location. In the above program, we have created and opened a file called fputc_test.txt in a write mode and declare our string which will be written into the file. The function getc() is reading the characters from the file.The function feof() is used to check the end of file after EOF. Use the fputs function to write the complete string.The syntax behind the fputc in C Programming language is as shown below.We are going to use the following specified file to demonstrate this C fputc function.From the above screenshot, you can observe that the sample.txt file is in our Documents folder and it is empty.The C fputc function used to write the character(s) to the user-specified file. The C compiler automatically places the '\0' at the end of the string when it initializes the array. In UNIX the translation of the keystroke to EOF is performed by the terminal driver, so a program does not need to distinguish terminals from other input files. Input from a terminal never really "ends" (unless the device is disconnected), but it is useful to enter more than one "file" into a terminal, so a key sequence is reserved to indicate end of input. The C compiler automatically places the '\0' at the end of the string when it initializes the array. It tests the end of file indicator. Most of the undefined behaviour is there because (at the time of writing the standard) not all processors behaved consistently. You're looking for '\n', which is the traditional end-of-line marker 2) Again, '/0' is a multi-character constant and is invalid. Syntax of putc: putc (ch, fptr); Where, … The C fputc function is useful to write the character(s) to the specified stream at the current position in a file and then advanced the pointer position.How to write the character, or character array (string), or string data to a File using fputc in C Programming with example?. To hold the null character at the end of the array, the size of the character array containing the string is one more than the number of characters in the word "Hello. Logic. EOF stands for End of File. And when we encounter EOF character it means we have reached the end of the file. To be painfully precise, end-of-file is a condition; EOF is a macro, expanding to a negative integer constant (typically -1), whose value is returned by certain functions when an end-of-file condition (or an Write a program in C to create a new file and save user name taken as input from the user. End-of-File. Note that EOF itself is not a character, but a signal that there are no more characters available. The Overflow Blog Open file in read/input mode using std::in; Check file exists or not, if it does not exist terminate the program; If file exist, run a loop until EOF (end of file) not found; Read a single character using cin …