c - difference for and while loops file i/o -

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I write a code that takes value from a text file and writes it in a text file, so I Then stuck, I read the end of the file, I think both codes are correct, no difference is not a bit, although I am getting the difference. I am unable to understand, besides, is there any other way to read eof? Thanks for all the praised answers. 

 for  (st = (fscanf (fptr_in, "% c", & amp; ch)); st == 1; st = (fscanf (fptr_in, "% C", & Amp; ch))   
 Other  
  st = (fscanf (fptr_in, "% c", and); while (st == 1) st = (Fscanf (fptr_in, "% c", and ch));    
 
 
 Betting is different for  in  you are using the return value of  fscanf  which is  int . When a  Int  is used as a conditional condition, it is like ! = 0 :  
  int x; if (x) {} // equiv to: if (x! = 0) {}   
 while in  while  you loop, you clearly Check if the return value is a  1 , therefore, if you want for your   loop  
  (= = st (= ( Fscanf (...)) == 1), then   
 (or vice versa  == 1  to  while  loop }) Should treat them the same way.

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