neon blade
while (fgets(buffer, sizeof buffer, stdin) == NULL || sscanf(buffer, "%d %d %d %d %d", &layerCount, &topLayerHeight, &layerHeightGrowth, &trunkWidth, &trunkHeight) != 5)
{
printf("Invalid input. Reinput all 5 values.\n");
}
Why does this piece of code freeze when i input "1 2 3 4 ^Z"? fgets should read "1 2 3 4 " and then sscanf would fail, and thus printing "Invalid input. Reinput all 5 values.\n"
fathom girderBOT
dawn mango
Should that be && instead of ||?
(incidentally, this is C code which ideally should be posted in #1013104018739974194 )
neon blade
Should that be `&&` instead of `||`?
No, I want the user to reinput the values if they entered only an EOF or if they entered data with a wrong format
neon blade
I seemed to have found the cause. It seems that in windows, when I type a ^Z, if it's not the only character in the line, then it's not treated specially as EOF but as a regular character. When that happens, all characters after the ^Z is ignored in this line
So when i input "1 2 3 4 ^Z", since all characters after ^Z was ignored, there would be no newline, and that caused fgets to block
https://stackoverflow.com/questions/45665230/ctrlz-behaviour-in-terminal
This answer seems to confirm my guess
dawn mango
Was about to add that I cannot test it the same way, because on Linux CTRL-Z just sends the application to the background.
Oh, and you're right about using ||.
Ignore my comment.
honest shore
sorry to be that guy, but why are you bothering with sscanf and stuff? for C, there's a whole separate section down there…
neon blade
sorry to be that guy, but why are you bothering with sscanf and stuff? for C, th...
Sorry, I just thought I would get more responses if I posted it here
!solved