/* ---------------------------------------------------------------------------- 
//  Figure 15.16:  Handling end-of-file and file input errors.
//      Handles end-of-file, hardware errors and format/data inconsistencies.             
//      If using scanf, the eof test would be: if (feof( stdin )) ... 
// ---------------------------------------------------------------------------- 
*/
#include "tools.h" 

#define in_name  "feet2.in"       
#define log_name "feet2.log"       
    
void main( void )                                      
{  
    int data, flag;
    stream f_in = fopen( in_name, "r" );  
    stream f_log = fopen( log_name, "w" );  

    if (f_in == NULL) fatal( "Cannot open file %s for input.", in_name );
    if (f_log == NULL) fatal( "Cannot open file %s for output.", log_name );

    for (;;) {                              /* Main data processing loop. */
        flag = fscanf( f_in, "%i", &data ); /* Read next item.            */
        if (flag == 1) {                    /* Test for successful read.  */
            printf( " Data: %i\n", data ); 
            /* Process the data here. */
        }
        else if (feof( f_in )) break;       /* End of file -- leave loop. */
        else if (ferror( f_in )) fatal( " Hardware error on input file." );
        else {                              /* Flag error and do recovery.*/
            fprintf( f_log, "\a Bad data: " );
            clean_and_log( f_in, f_log );   /* Flush & echo rest of line. */
        }   
    }
    bye(); 
}