Why the last line of the output twice? Thank you very much!

CodePudding user response:

To evaluate the fgets return value, when they read the EOF returns NULL, then it is good to break out of the loop ~

CodePudding user response:

Judge the return value first, then print, while judging feof again

CodePudding user response:

Change, so look at the line not line?

 # include & lt; stdio.h> 

Int main (void) 
{
FILE *fp; 
Char buf [BUFSIZ]; 

If ((fp=fopen (__FILE__, "r"))==NULL) 
{
Perror (" fopen "); 
return 1; 
} 

while(! The feof (fp) & amp; & The fgets (buf, BUFSIZ, fp)) 
{
Printf (" % s ", buf); 
} 

return 0; 
}