Reading and writing player data from an SD card

i'm prototyping system larger progect, , had few questions.
what want happen when press button on board, player's level progress goes one. when level progress reaches 10, player's level should go up, , gets displayed on serial monitor. want level progress , level saved different files on sd card, can read future use.

code: [select]

#include <tinkerkit.h>

tkbutton button(i0); // creating object 'button' belongs 'tkbutton' class


tkled led(o0); // creating object 'led' belongs 'tkled' class


#include <sd.h>

file playerlevel;
file playerlevelprogress;

 
  int level = 1;

 
  int levelprogress = 0;

 


void setup()
{
  // open serial communications , wait port open:
  serial.begin(9600);
  while (!serial) {
    ; // wait serial port connect. needed leonardo only
  }


  serial.print("initializing sd card...");
  // on ethernet shield, cs pin 4. it's set output default.
  // note if it's not used cs pin, hardware ss pin
  // (10 on arduino boards, 53 on mega) must left output
  // or sd library functions not work.
  pinmode(10, output);
  serial.println("initialization done.");

  if (!sd.begin(4)) {
    serial.println("initialization failed!");
    return;
  }
 

}

void loop()
{

 


  if (button.pressed() == high){
    levelprogress += 1;
    serial.println("level progress = ");
    serial.println(levelprogress);
    sd.open("playerlevelprogress", file_write);
    playerlevelprogress.write(levelprogress);
    playerlevelprogress.close();
    sd.open("playerlevel", file_read);
 
  }

  if (levelprogress == 10){
    level += 1;
    serial.println("level up! level ");
    serial.println(level);
    sd.open("playerlevel", file_write);
    playerlevel.write(level);
    playerlevel.close();
    levelprogress = 0;
    sd.open("playerlevel", file_read);
 
  }

  delay(100);
}





it works according plan, if click out of serial monitor, , bring up, resets. i'm assuming has way i'm defining integers , , tried defining integers whatever read specific file on sd card, when happens counter level progress stays @ 0. that's kind of mystery me.

how program save information on sd card, when restart serial monitor, counter starts @ same place stopped before closed down?

quote

what want happen when press button on board

what button on board? wouldn't switch work better?

code: [select]

    sd.open("playerlevelprogress", file_write);
the open() method returns instance of file. why discarding instance?

code: [select]

    playerlevel.write(level);
    playerlevel.close();

you've never assigned value playerlevel.

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