Help me with gets and fgets

Question

What's the difference between "fgets(str, sizeof str, stdin);" and "gets(str)" ? I think both have the same function. Thank you already

Answer 1

as u can see, with fgets we can specify the number of bytes we want to write..fgets also stop when it encounters eof but not gets
using gets may cause buffer overfow

Answer 2

Rishi there will be no problem till the time the input is within limits of buffer ( arr in this case )

The problem occurs when it reads a string greater than size of your buffer.

gets() only know from where to start writing in memory ( starting on the buffer ) and doesn't know when to stop, causing(as Lily Mea mentioned ) buffer overflow if huge input is provided.

Whereas fgets() does know when to stop ( provided as argument ) and will not write beyond the limit of your buffer, making it much safer alternative.

Answer 3

Oh thank you Arsenic I got it now. Thank you too Lily Mea

Answer 4

Martin Taylor oh okay sure. Thank you

Answer 5

Lily Mea yeah but I don't quite understand it. Here, how does sizeof() function work for a string that is entered? And anyway both are going to stop after the end of the sentence that we entered. So what's the difference?