Select a field using conio

[SophieEEE]

Hi, I am trying to create a Sudoku game. I need to use conio.h to select a field and move the cursor to that field to insert a value. Is this how I select the first field of my matrix [9][9] ? And do I need to initialize selectfield ?

char selectfield = 0;
do{
switch (selectfield){
case '1A':

i = [0];
j = [0];

gotoxy (i,j);

break;
}