How to send EOF via Windows terminal

Question

I'm trying to comprehend Example 1.9 from the K&R book, but I don't get how to send EOF. Some sources mentioned Ctr+Z, but that simply terminates the program. I somehow managed to send EOF with a combination of Enter and Ctrl+Z and maybe Ctrl+V, but I can't reproduce it.

#include <stdio.h>
#define MAXLINE 1000

main()
{
    int len;
    int max;
    char line[MAXLINE];
    char save[MAXLINE];

    max = 0;
    while((len = getline_my(line, MAXLINE)) > 0)
    if(len > max) {
        max = len;
        copy(line, save);
    }
    if(max > 0)
        printf("%s", save);
}

getline_my(s, lim)
char s[];
int lim;
{
    int c, i;

    for(i=0; i < lim-1 && (c = getchar()) != EOF && c != '\n'; i++)// As long as the condition is fulfilled
        s[i] = c;
    if (c == '\n') {
        s[i] = c;
        i++;
    }
    s[i] = '\0';
    return(i);
}

copy(s1, s2)
char s1[];
char s2[];
{
    int i;

    i = 0;
    while((s2[i] = s1[i]) != '\0')
        i++;

}

that was for unix .. these are all the commands on cmd http://ss64.com/nt/syntax-keyboard.html — Osama Javed, Apr 21 '13 at 21:39

score 81 · Accepted Answer · edited Dec 08 '21 at 23:35

81

You can simulate EOF with CTRL+D (for *nix) or CTRL+Z then Enter (for Windows) from command line.

edited Dec 08 '21 at 23:35

Kartheek Tammana

70
6

answered Apr 21 '13 at 22:33

xagyg

9,562
2
32
29

6

This didn't work for me (Windows 10 + Anaconda Terminal) but the answer provided @mauriceShun did. – MrMas Dec 10 '17 at 02:25
This does not work on Windows 7 cmd.exe (does not send EOF character that C program is looking for). – cmaceachern Sep 23 '19 at 13:48
16

On Windows you need to press `ENTER` after `CTRL+Z` to actually send it. – Carl Walsh Nov 23 '19 at 19:31
1

ctrl-D needs to stand at the beginning of a line. On mac OS I press return and then ctrl-D. – Kristian Heitkamp Nov 22 '22 at 09:53

mauriceShun · Answer 2 · 2017-03-10T05:22:34.933

8

In widows, when you are ready to complete the input, press the Enter key and then press Ctrl+Z and then Enter to complete the input.

int main(){
    char ch[100];    
    scanf("%[^EOF]",ch);    
    printf("\nthe string is:\n%s\n",ch);    
    fflush(stdin);    
    return 0;    
    }

edited Mar 10 '17 at 05:22

answered Mar 10 '17 at 05:17

mauriceShun

153
1
3

5

`scanf("%[^EOF]",ch);` and `fflush(stdin);` are bad. – BLUEPIXY Dec 08 '17 at 03:44
4

This is totally nonsense answer! – Antti Haapala -- Слава Україні Jun 22 '19 at 01:21
The text is correct, but the code... is this a joke? What does `"%[^EOF]"` do? Can you post a resource where this is documented? And what is `fflush(stdin)` supposed to do? – wovano Sep 30 '21 at 05:58

score 3 · Answer 3 · answered Sep 23 '19 at 13:53

In the end, it can't be done easily on Windows given the simple K&R code which was meant for Unix-like systems. You can send '^Z^M' (Ctrl-Z and then Enter) to send Windows equivalent of EOF but the char 'EOF' you are checking for in this C program is not the same.

Short answer: you can't.

How to send EOF via Windows terminal

3 Answers3

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