How to simulate an EOF?

Question

I am currently reading K&R's book and typing in the examples from the first section, and there are a couple of examples such as this:

while((c = getchar()) != EOF) {
    //do something
}

I am testing these examples on a Windows box and thus running the compiled exe files from the cmd prompt.

To test the example above, how do I simulate an EOF? That is, basically how can I make the loop stop when testing the example from the command prompt?

score 102 · Accepted Answer · edited Apr 14 '16 at 07:42

102

To enter an EOF, use:

^Z (CtrlZ) in Windows
^D on Unix-like systems

edited Apr 14 '16 at 07:42

gsamaras

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answered Jul 13 '09 at 11:35

Greg Hewgill

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Some useful addition: If you are on a line that's not empty, you will have to double press ^D: Pressing it one time will flush that line, pressing it another time will send EOF. If you are on an empty line, one ^D is enough. – Johannes Schaub - litb Jul 13 '09 at 11:38
12

That's the HTML element. – Greg Hewgill Jul 13 '09 at 12:02
2

In Windows, entering ^Z only produces EOF if done at the start of a line. – M.M Sep 23 '15 at 10:49

score 21 · Answer 2 · answered Jul 13 '09 at 11:35

21

Refer EOF

Windows: Ctrl+Z
Unix :Ctrl+D

answered Jul 13 '09 at 11:35

aJ.

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score 2 · Answer 3 · answered Dec 07 '13 at 18:10

2

First, press: Ctrl^X, next: Ctrl^D

answered Dec 07 '13 at 18:10

user3078185

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score 1 · Answer 4 · edited Aug 22 '12 at 16:56

1

You can also simulate EOF by explicitly giving int variable a value of -1.

Check out this code for more clarity:

#include<stdio.h>

int main() {    
    // char ch=getchar()
    // int ch=-1;

    if(ch==EOF) { printf("\nEOF: %d",EOF); }
    if((ch!=EOF)==0) { printf("\nit is equal to 0"); }
    if((ch!=EOF)==1) { printf("\nit is equal to 1"); }
    else { printf("\n it is equal to other value"); }
    system("pause");
    return 0;
}

edited Aug 22 '12 at 16:56

sschrass

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answered Aug 22 '12 at 12:37

Hmm, it could be a different value than -1. -1 is only a convention (or the value for EOF under a few OSes) – Alex Jul 06 '15 at 13:56
This does not answer the question. – ATaco Jul 03 '17 at 02:20

score 1 · Answer 5 · edited Nov 10 '19 at 01:03

1

I had the same problem after pressing Ctrl+d program stopped and returned 0. If you use Clion press Ctrl+Shift+a than type Registry press enter and make sure run.processes.with.pty. is unchecked. After that compile program again and then you can type in input but don't press Ctrl+d on the same line as input it will return 0 or Error.

edited Nov 10 '19 at 01:03

Arun AK

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answered Nov 09 '19 at 20:44

Toffy_

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How to simulate an EOF?

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