you need ascii character to display in LCD so here’s the trick of that program.
example you want to display 23 in LCD then we will store that 23 in a variable
int c = 23;
c = c/10; // c now is = 2 since we are deviding integer numbers.
c= c+48; // now we add 48 to convert it to ascii character and ready to display in LCD.. 2+48 =50. 50 is the ascii equivalent of number 2..
then do the same for the other number
c = c%10; // c now is e = 3 since we se modulo operation.
c= c+48; // now we add 48 to convert it to ascii character and ready to display in LCD.. 3+48 =51. 51 is the ascii equivalent of number 3
and after that operation you are ready to display 23 in the LCD. 
lcd_cmd(0xc3); // this is simply for the location of the lcd
if 0xCx meaning 2nd row and the value of x is anything not more than 16 since we have 2x16 LCD
when we have 0x8x meaning 1st row and the value of x is lcd
anything not more than 16 since we have 2x16
i hope you got it.. ")