Serial.print() VS File.print()

hy guys,
so, have not many experience... , question may silly...

i wanto log data coming out form currentcost energy meter.

i can see data coming out currentcost connected softwareserial pin rx. data clean , readable.

ÿÿÿÿÿÿÿÿÿÿÿÿ                   <msg><date><dsb>00082</dsb><hr>20</hr><min>34</min><sec>05</sec></date><src><name>cc02</name><id>02859</id><type>1</type><sver>1.06</sver></src><ch1><watts>00184</watts></ch1><ch2><watts>00000</watts></ch2><ch3><watts>00000</watts></ch3><tmpr>25.6</tmpr></msg>



i can write info , run exemple sdfat.

when mesh serial.print(nameofvariable) , sd operation (open file or file.print(nameofvariable)) data came not readable in terminal , on file. log data on file of sd, cannot read (as human) i've got.

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what i'm missing in sketch:

#include <sdfat.h>
#include <sdfatutil.h>
#include <softwareserial.h>

sd2card card;
sdvolume volume;
sdfile root;
sdfile file;

#define rxpin 4
#define txpin 300

softwareserial softserial =  softwareserial(rxpin,txpin);


void setup(void)
{  
 pinmode(rxpin, input);  
 pinmode(txpin, output);
 softserial.begin(9750);

 serial.begin(9600);
 serial.println();
 pgmprintln("type character start");
 while (!serial.available());
 
 // initialize sd card
 !card.init();

 // initialize fat volume
 !volume.init(card);

 // open root directory
 !root.openroot(volume);
 

 serial.println();

 serial.println("done");
}


void loop(void){
 
// file.writeerror = false;
 
   !file.open(root, "currcost.log", o_creat | o_append | o_write);

     char somechar = softserial.read();
     //char somechar = softserial.read();
     serial.print(somechar);
     file.write(somechar);
     
   !file.close() || file.writeerror ;

}

thanks in advance

code: [select]

!card.init();
the card.init() function returning value, negating , discarding. why bother negating it? don't care whether init() function succeeds?

code: [select]

!volume.init(card);
same questions.

code: [select]

!root.openroot(volume);
ditto.

code: [select]

  !file.open(root, "currcost.log", o_creat | o_append | o_write);
so, if file fails open, try write anyway. makes perfect sense me.

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