How to print a float with 3 decimal places

i can not figure out syntax print float has 3 decimal places. found useful snippet of code float value keypad:

code: [select]

      while (1) { //get digits
        byte digit = checkkeybuffer(); //get keypress user
        if (digit >= 0 && digit <= 9) { //a digit
          if (dp == 0) {
            entry = entry * 10;
            entry = entry + digit;
          }
          if (dp > 0) {
            digit = digit / pow(10, dp);
            digit = entry + digit;
            dp = dp + 1;
          }
          break;
        }
        else if (digit == keyasterisk) { //decimal point
          dp = 1;
          break;
        }
      } //end while getting digits

to print lcd tried this:

code: [select]

sprintf(thebuffer, "%03d", entry);
disp.lcd_print(thebuffer);

     but doesn't print right of decimal. there simple way this?

"%d" integers, %f not work on arduino space reasons. try dtostrf().

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