C library functions - feof ()

C standard library - <stdio.h>

description

C library functionsint feof (FILE * stream) test given flow stream end of file identifier.

statement

Here is the feof () function's declaration.

int feof(FILE *stream)

parameter

• stream - This is a pointer to FILE pointer to an object, the object identifier FILE flow.

return value

When setting up the stream associated with the end of file identifier, the function returns a non-zero value, otherwise it returns zero.

Examples

The following example demonstrates the feof () function is used.

#include <stdio.h>

int main ()
{
   FILE *fp;
   int c;
  
   fp = fopen("file.txt","r");
   if(fp == NULL) 
   {
      perror("打开文件时发生错误");
      return(-1);
   }
   while(1)
   {
      c = fgetc(fp);
      if( feof(fp) )
      { 
          break ;
      }
      printf("%c", c);
   }
   fclose(fp);
   return(0);
}

Suppose we have a text filefile.txt, its contents are shown below.The document will serve as our example program using an input:

这里是 w3cschool.cc

Let's compile and run the above program, which will result in the following:

这里是 w3cschool.cc

C standard library - <stdio.h>