eof

Why Ctrl + Z does not trigger the loop to finish on the following small program? #include <stdio.h> main() { int c; while ((c = getchar()) != EOF) { //nothing } return 0; } If I enter: test^ZEnter , it does not get out of the loop. I found related questions around ( here and here ) but none to explain it for C (not C++) under Windows. Note : I use Visual Studio 2015 PRE on a windows 8.1 You need to hit Enter and then use ctrl + Z and then Enter again. or, you may also use F6 Marcus Müller EOF like you use it is not a character. It's the status in which that stream is. I mean, heck, you even

I am creating a program (In C++) that takes an ASCII file and reads a few values from each line until it reaches the end of the file. I am using ifstream to read the file, and I have never had problems with it stopping when I use the ifstream.eof() method. This time, however, even though it found the eof character in my test case, when I analyzed my other files, it is infinite looping because it never finds the eof character. Is this a coding issue, or an issue with my files? string line = ""; unsigned long pos = 0; ifstream curfile(input.c_str()); getline(curfile, line); int linenumber = 0;

Inspired by my previous question A common mistake for new C++ programmers is to read from a file with something along the lines of: std::ifstream file("foo.txt"); std::string line; while (!file.eof()) { file >> line; // Do something with line } They will often report that the last line of the file was read twice. The common explanation for this problem (one that I have given before) goes something like: The extraction will only set the EOF bit on the stream if you attempt to extract the end-of-file, not if your extraction just stops at the end-of-file. file.eof() will only tell you if the

char **query; query = (char**) malloc ( sizeof(char*) ); int f=0; int i=0,j=0,c; while((c=getchar())!=EOF) { if(!isalpha(c)) continue; if(f==1) query=(char**) realloc(query,(i+1)*sizeof(char*)); query[i]=(char*) malloc(sizeof(char)); query[i][j]=c; j++; while( (c=getchar())!=EOF&&c!=' '&&c!='\t' ) { query[i]=(char*) realloc(query[i],(j+1)*sizeof(char)); query[i][j]=c; ++j; } query[i][j]='\0'; printf("%s\n",query[i]); if(c==EOF){ break; } ++i; f=1; j=0; } I want the above code snippet to read a line of strings separated by spaces and tabs until ONE EOF but it requires 2 EOFs to end the loop.

The newline character is represented by "\n" in C code. Is there an equivalent for the end-of-file (EOF) character? EOF is not a character (in most modern operating systems). It is simply a condition that applies to a file stream when the end of the stream is reached. The confusion arises because a user may signal EOF for console input by typing a special character (e.g Control-D in Unix, Linux, et al ), but this character is not seen by the running program, it is caught by the operating system which in turn signals EOF to the process. Note: in some very old operating systems EOF was a

I'm reading The C Programming Language and have understood everything so far. However when I came across the getchar() and putchar() , I failed to understand what is their use, and more specifically, what the following code does. main() { int c; while ((c = getchar()) != EOF) putchar(c); } I understand the main() function, the declaration of the integer c and the while loop. Yet I'm confused about the condition inside of the while loop. What is the input in this C code, and what is the output. Sorry if this is a basic and stupid question, but I'm just looking for a simple explanation before I