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TABLE.C
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─────Run-Time Library───────────────────────────────────────────────────────
/* TABLE.C illustrates reading and writing formatted file data using
* functions:
* fprintf fscanf
*
* For more examples of formatted input and output, see SCANF.C and
* PRINTF.C.
*/
#include <stdio.h>
#include <io.h>
#include <fcntl.h>
#include <sys\types.h>
#include <sys\stat.h>
#include <stdlib.h>
void main()
{
char buf[128];
FILE *ftable;
long l, tl;
float fp, tfp;
int i, c = 'A';
/* Open an existing file for reading. Fail if file doesn't exist. */
if( (ftable = fopen( "table.smp", "r")) != NULL )
{
printf( "Reading table file\n" );
/* Read data from file and total it. */
for( i = 0, tl = 0L, tfp = 0.0; i < 10; i++ )
{
fscanf( ftable, "\t%s %c: %ld %f\n", buf, &c, &l, &fp );
tl += l;
tfp += fp;
printf( "\t%s %c: %7ld %9.2f\n", buf, c, l, fp );
}
printf( "\n\tTotal: %7ld %9.2f\n", tl, tfp );
remove( "table.smp" );
}
else
{
/* File did not exist. Create it for writing. */
if( (ftable = fopen( "table.smp", "w" )) == NULL )
exit( 1 );
/* Write table to file. */
for( i = 0, l = 99999L, fp = 3.14; i < 10; i++ )
fprintf( ftable, "\tLine %c: %7ld %9.2f\n",
c++, l /= 2, fp *= 2 );
printf( "Created table file. Run again to read it.\n" );
}
fclose( ftable );
exit( 0 );
}
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