Input and Output - Java - page 376

/* Driver - main program */
public

public static static void void main ( String [] av ) throws throws IOException {

iif ( av . length == 0 )
new

new SimpleCalcStreamTok (
new new InputStreamReader ( System . in )). doCalc ();

else else

for ( int

int i = 0 ; i < av . length ; i ++)
new new SimpleCalcStreamTok ( av [ i ]). doCalc ();

}

/** Construct by filename */
public

public SimpleCalcStreamTok ( String fileName ) throws throws IOException {

this this ( new new FileReader ( fileName ));

}

/** Construct from an existing Reader */
public public SimpleCalcStreamTok ( Reader rdr ) throws throws IOException {

tf = new new StreamTokenizer ( rdr );

// Control the input character set:
tf . slashSlashComments ( true true ); // treat "//" as comments

tf . ordinaryChar ( '-' ); // used for subtraction

tf . ordinaryChar ( '/' ); // used for division

s = new new Stack ();

}

/** Construct from a Reader and a PrintWriter
*/
public public SimpleCalcStreamTok ( Reader in , PrintWriter out ) throws throws IOException {

this this ( in );

setOutput ( out );

}

/**
* Change the output destination.
*/
public public void void setOutput ( PrintWriter out ) {

this this . out = out ;

}

protected protected void void doCalc () throws throws IOException {

int int iType ;

double

double tmp ;

while while (( iType = tf . nextToken ()) != StreamTokenizer . TT_EOF ) {

switch

switch ( iType ) {