Thread: CTRL-C for EOF in Visual C++

Say I have the following:

Code:

while ((ch = getchar()) != EOF)
       putchar(ch);

and hit F5 to run it in Visual C++, if I force an EOF with CTRL-C it raises an exception. However if I run the program from the command line, it exits cleanly (although printing the ^C)

Why is this? Say I wanted to print a message after the EOF is reached, it won't get to that part in Visual C++ debug mode. I just get a "first chance exception" message.

EOF isn't Ctrl-C. Ctrl-Z, however, is.

Oops, so it is. But another question:

Say I have this:

Code:

int main(void)
{
    int ch;
    int ct = 0;
    
    while ((ch = getchar()) != EOF)
        ct++;
    printf("%d characters read\n", ct);
    
    return 0;
}

Shouldn't CTRL-Z force the EOF at any time, even before a newline has been sent? Or does nothing happen until the newline flushes the buffer?

Yet when I run this and type a few characters on one line, ending with a CTRL-Z and a newline, the program prints the ^Z then goes onto the new line and continues. Only then, if I type another ^Z and Enter will the program break out of the loop. I thought I understood what was going on with getchar() and EOF but it appears I was wrong!