What is - while(scanf("%d %d",&n,&m)!=EOF) ?

Replies

• 

  Whats In Name

  scanf returns the number of items assigned,EOF means end-of-file and has value -1,so this statement probably means run the loop 2 times.
  
  *Please correct me,if I am wrong
• 

  rahul69

  lit-857

  wts EOF AND IS SCANF returen values?

  This statement simply means keep on scanning the values of m and n until End of File is reached.
  Scanf returns number of variables scanned normally but it returns EOF if End of File is reached before variables could be scanned.😀
• 

  Prateek Gupta

  scanf :- used to scan the values.
  EOF:- indicates the End Of File.
  != :- relational operator (not equal to)
  this can be understood like this :-
  keep scanning the values in variables n and m from the file until EOF has not been found.