What is wrong with my C code? I've also added a screen shot with the expected outputs: #include "railcipher.h$"$

#include

#include

#include

#define MAX$\_$TEXT$\_$LENGTH $1024$

#define MAX$\_$KEY$\_$LENGTH $26$

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

int key$[$MAX$\_$KEY$\_$LENGTH$]$;

int keyLength $=$ validateKey$($argc$,$ argv, key$)$;

if $($keyLength $==-1)$ return $1$; $//$ Validation failed

char command$[$MAX$\_$TEXT$\_$LENGTH $+8],$ result$[$MAX$\_$TEXT$\_$LENGTH$]$;

printf$("$Enter command $($encrypt$/$decrypt$/$quit$)$: $")$;

while $($fgets$($command$,$ sizeof$($command$),$ stdin$))\{$

$//$ Remove trailing newline

command$[$strcspn$($command$,"$

$")]=0$;

if $($strncmp$($command$,$ "quit", $4)==0)\{$

break;

$\}$ else $\{$

processCommand$($command$,$ key, keyLength, result$)$;

printf$("\%$s

$",$ result$)$;

$\}$

printf$("$Enter command $($encrypt$/$decrypt$/$quit$)$: $")$;

$\}$

return $0$;

$\}$

void processCommand$($const char $*$command$,$ const int $*$key$,$ int keyLength, char $*$result$)\{$

char text$[$MAX$\_$TEXT$\_$LENGTH$]$;

if $($sscanf$($command$,$ "encrypt $\%1023[^$

$]",$ text$)==1)\{$

encrypt$($text$,$ key, keyLength, result$)$;

$\}$ else if $($sscanf$($command$,$ "decrypt $\%1023[^$

$]",$ text$)==1)\{$

decrypt$($text$,$ key, keyLength, result$)$;

$\}$ else $\{$

strcpy$($result$,$ "Invalid command. Please enter 'encrypt', 'decrypt', or 'quit'."$)$;

$\}$

$\}$

void encrypt$($const char $*$text$,$ const int $*$key$,$ int keyLength, char $*$result$)\{$

int length $=$ strlen$($text$)$;

char rail$[$keyLength$][$length$]$;

memset$($rail$,\text{'}\backslash 0\text{'},$ sizeof$($rail$))$;

$//$ Direction: $0=$ downward, $1=$ upward

int row $=0,$ col $=0,$ direction $=0$;

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

rail$[$row$][$col$++]=$ text$[$i$]$;

if $($row $==0)$ direction $=0$;

else if $($row $==$ keyLength $-1)$ direction $=1$;

direction $?$ row$--$ : row$++$;

$\}$

int idx $=0$;

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

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

if $($rail$[$i$][$j$]!=\text{'}\backslash 0\text{'})$ result$[$idx$++]=$ rail$[$i$][$j$]$;

$\}$

$\}$

strcpy$($result$,$ "Encrypted: Placeholder"$)$;

$\}$

void decrypt$($const char $*$text$,$ const int $*$key$,$ int keyLength, char $*$result$)\{$

int length $=$ strlen$($text$)$;

char rail$[$keyLength$][$length$]$;

memset$($rail$,\text{'}\backslash 0\text{'},$ sizeof$($rail$))$;

int row $=0,$ col $=0,$ direction $=0$;

$//$ First pass to mark the zigzag pattern

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

rail$[$row$][$col$++]=1$; $//$ Just mark the cell as filled

if $($row $==0)$ direction $=0$;

else if $($row $==$ keyLength $-1)$ direction $=1$;

direction $?$ row$--$ : row$++$;

$\}$

$//$ Fill the rail matrix with the ciphertext

int idx $=0$;

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

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

if $($rail$[$i$][$j$]==1$ && idx $$ length$)$ rail$[$i$][$j$]=$ text$[$idx$++]$;

$\}$

$\}$

$//$ Read off the matrix in zig$-$zag manner

memset$($result$,\text{'}\backslash 0\text{'},$ length $+1)$; $//$ Clear result

row $=$ col $=$ idx $=0$;

direction $=0$;

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

result$[$idx$++]=$ rail$[$row$][$col$++]$;

if $($row $==0)$ direction $=0$;

else if $($row $==$ keyLength $-1)$ direction $=1$;

direction $?$ row$--$ : row$++$;

$\}$

strcpy$($result$,$ "Decrypted: Placeholder"$)$;$//$ Null$-$terminate the result

$\}$

int validateKey$($int argc, char $*$argv$[],$ int $*$key$)\{$

if $($argc $<mtext\; id="EditorElement\_718253"></mtext><mn\; id="EditorElement\_718254">3</mn><mi\; id="EditorElement\_718255">)</mi><mtext\; id="EditorElement\_718256"></mtext><mi\; id="EditorElement\_718257">\{</mi>$

printf$("$Usage: $\%$s

$",$ argv$[0])$;

return $-1$;

$\}$

int keyLength $=$ atoi$($argv$[1])$;

if $($keyLength $<mtext\; id="EditorElement\_718380"></mtext><mn\; id="EditorElement\_718381">1</mn><mtext\; id="EditorElement\_718382"></mtext><mi\; id="EditorElement\_718383">|</mi><mi\; id="EditorElement\_718384">|</mi>$ keyLength $>$ MAX$\_$KEY$\_$LENGTH$)\{$

printf$("$Error: Invalid key length.

$")$;

return $-1$;

$\}$

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

key$[$i$]=$ atoi$($argv$[$i $+2])$;

$//$ Additional validation for the key elements can be added here

$\}$

$//$ Validation passed

return keyLength;

$\}$