When i used a few gets() to obtain strings from the user, My programme will not run properly. At some point of gets(), it didn't pause whereas it just continues running without waiting for the user input.
So i tried using scanf() with fflush().. it solved the problem. How ever this method is not recommended, please tell me what i should do.
No, gets() IS THE PROBLEM!
Cprogramming.com FAQ > Why gets() is bad / Buffer Overflows
Use fgets() to read every single bit of your input - no scanf, no getchar, and DEFINITELY NO gets().
When the line of input is in a buffer, then you can parse it however you want, say using sscanf if you're feeling lazy.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Post up an example showing the problem, along with the input that caused it, and we'll show you the fix.
There are two probable reasons for this:
1) gets() is being over-filled at some point with undefined results
2) gets() is encountering left over char's (probably newlines), in the keyboard buffer, and accepting those as input for one or more of your variables.
Either way, we can fix it.
fflush() on standard input is very unreliable. It works very well on output streams, but not on input streams.
#2 is by far the most common problem on this forum.
