$/*$ TODO: COMPLETE THE MAIN FUNCTION

$*$ This program prints "valid" $($without quotes$)$ if the input file contains

$*$ a valid state of a Sudoku puzzle board wrt to rows and columns only.

$*$ It prints "invalid" $($without quotes$)$ if the input file is not valid.

$*$

$*$ Usage: A single CLA that is the name of a file that contains board data.

$*$

$*$ argc: the number of command line args $($CLAs$)$

$*$ argv: the CLA strings, includes the program name

$*$

$*$ Returns $0$ if able to correctly output valid or invalid.

$*$ Exit with a non$-$zero result if unable to open and read the file given.

$*/$

int main$($ int argc, char $**$argv $)\{$

$//$ TODO: Check if number of command$-$line arguments is correct.

$//$ Open the file

FILE $*$fp $=$ fopen$(*($argv $+1),"$r$")$;

if $($fp $==$ NULL$)\{$

printf$("$Can$\text{'}$t open file for reading.

$")$;

exit$(1)$;

$\}$

$//$ will store the board's size, number of rows and columns

int size;

$//$ TODO: Call get$\_$board$\_$size to read first line of file as the board size.

$//$ TODO: Dynamically allocate a $2$D array for given board size.

$//$ You must dyamically create a $1$D array of pointers to other $1$D arrays of ints

$//$ Read the remaining lines.

$//$ Tokenize each line and store the values in your $2$D array.

char $*$line $=$ NULL;

size$\_$t len $=0$;

char $*$token $=$ NULL;

for $($int i $=0$; i $<$ size; i$++)\{$

$//$ read the line

if $($getline$($&line, &len, fp$)==-1)\{$

printf$("$Error while reading line $\%$i of the file.

$",$ i$+2)$;

exit$(1)$;

$\}$

token $=$ strtok$($line$,$ DELIM$)$;

for $($int j $=0$; j $<$ size; j$++)\{$

$//$ TODO: Complete the line of code below

$//$ to initialize elements of your $2$D array.

$/*$ ADD ARRAY ACCESS CODE HERE $*/=$ atoi$($token$)$;

token $=$ strtok$($NULL$,$ DELIM$)$;

$\}$

$\}$

$//$ TODO: Call valid$\_$board and print the appropriate

$//$ output depending on the function's return value.

$//$ TODO: Free dynamically allocated memory.