void display ｛ unsigned int vol ; vol = dat 50000255+05;p2=0xef;p0= seg vol 1000&0x7f; delay 300;P2=0xf7;p0= seg vol 1000100; delay 200;p2=0xfb;p0= seg vol 10010; delay 200;P2=0xfd;P0= seg vo110; d

This code defines a function called "display" that displays a voltage value on a 4-digit 7-segment LED display. The voltage value is stored in a variable called "dat".

The function first calculates the voltage value in millivolts using the formula "dat * 5000.0 / 255". This calculation is performed using floating point arithmetic.

The voltage value is then split into its individual digits (thousands, hundreds, tens, and ones) and each digit is displayed on a separate segment of the LED display.

The display is controlled using four control pins (p0-p3) and four segment lookup tables (seg[0]-seg[9]). The control pins are set to specific values to select each digit and the corresponding segment lookup table is used to determine which segments to light up to display the digit.

The delays between each display operation are used to ensure that the display is updated at a reasonable rate and to prevent flickering