my code encodes and decodes like this

Test VigenereForwardIterator

First phrase: $"$To be$,$ or not to be: that is the question:"

Encoded text: $"$Lt nf$,$ ia ccm lt nf: nqph bk ytf kdtgmatz"

Decoded text: $"$To be$,$ or not to be: that is the question"

Second phrase: $"$Be cool"

when i need it to do this

Test VigenereForwardIterator

First phrase: $"$To be$,$ or not to be: that is the question:"

Encoded text: $"$Lt nf$,$ ia ccm lt nf: nqph bk ytf kdtgmatz:"

Decoded text: $"$To be$,$ or not to be: that is the question:"

Second phrase: $"$Be cool"

Encoded text: $"$Tj opiu"

Decoded text: $"$Be cool"

Third phrase: $""$

Encoded text: $""$

Decoded text: $""$ done

and also YOU ARE NOT ALLOWED TO CHANGE THE P$2$ AT ALL, ONLY THE VIGERENEFORWARDITERATOR.CPP

VIGERENEFORWARDITERATOR.CPP

void VigenereForwardIterator::encodeCurrentChar$()$ noexcept $\{$

if $($fKeys $!=$ fKeys.end$())\{$

char messageChar $=$ fSource$[$fIndex$]$;

if $($std::isalpha$($messageChar$))\{$

char keywordChar $=*$fKeys;

if $(!$std::isalpha$($keywordChar$)||!$std::isupper$($keywordChar$))\{$

fCurrentChar $=$ messageChar;

return;

$\}$

size$\_$t row $=$ static$\_$cast$($keywordChar $-\text{'}$A$\text{'})$;

if $($row $>=$ CHARACTERS$)\{$

fCurrentChar $=\text{'}?\text{'}$;

return;

$\}$

size$\_$t column $=$ static$\_$cast$($std::toupper$($messageChar$)-\text{'}$A$\text{'})$;

char encodedChar $=$ fMappingTable$[$row$][$column$]$;

if $($std::islower$($messageChar$))\{$

encodedChar $=$ std::tolower$($encodedChar$)$;

$\}$

fCurrentChar $=$ encodedChar;

$++$fKeys;

$\}$

else $\{$

fCurrentChar $=$ messageChar;

$\}$

$\}$

$\}$

void VigenereForwardIterator::decodeCurrentChar$()$ noexcept $\{$

if $($fKeys $!=$ fKeys.end$())\{$

char messageChar $=$ fSource$[$fIndex$]$;

if $($std::isalpha$($messageChar$))\{$

char keywordChar $=*$fKeys;

if $(!$std::isalpha$($keywordChar$)||!$std::isupper$($keywordChar$))\{$

fCurrentChar $=$ messageChar;

return;

$\}$

size$\_$t row $=$ static$\_$cast$($keywordChar $-\text{'}$A$\text{'})$;

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

while $($column $<$ CHARACTERS && fMappingTable$[$row$][$column$]!=$ std::toupper$($messageChar$))\{$

$++$column;

$\}$

if $($column $<$ CHARACTERS$)\{$

int decodedCharInt $=\text{'}$A$\text{'}+$ static$\_$cast$($column$)$;

char decodedChar $=$ static$\_$cast$($decodedCharInt$)$;

if $($std::islower$($messageChar$))\{$

decodedChar $=$ std::tolower$($decodedChar$)$;

$\}$

fCurrentChar $=$ decodedChar;

$++$fKeys;

$\}$

else $\{$

fCurrentChar $=$ messageChar;

$\}$

$\}$

else $\{$

fCurrentChar $=$ messageChar;

$\}$

$\}$

$\}$

P$2$ that is in my main, do not edit

#ifdef P$2$

void runP$2()$

$\{$

gCount$++$;

std::cout $<<$ "Test VigenereForwardIterator" $<<$ std::endl;

std::string lKey $=$ "Relations";

std::string lPhrase$1="$To be$,$ or not to be: that is the question:";

std::cout $<<$ "First phrase: $\backslash ""<<$ lPhrase$1<<"\backslash ""<<$ std::endl;

std::string lEncoded$1$;

VigenereForwardIterator iter$1($lKey$,$ lPhrase$1)$;

for $($; iter$1!=$ iter$1.$end$()$; $++$iter$1)$

$\{$

lEncoded$1+=*$iter$1$;

$\}$

std::cout $<<$ "Encoded text: $\backslash ""<<$ lEncoded$1<<"\backslash ""<<$ std::endl;

std::string lDecoded$1$;

VigenereForwardIterator iter$2($lKey$,$ lEncoded$1,$ EVigenereMode::Decode$)$;

for $($; iter$2!=$ iter$2.$end$()$; iter$2++)$

$\{$

lDecoded$1+=*$iter$2$;

$\}$

std::cout $<<$ "Decoded text: $\backslash ""<<$ lDecoded$1<<"\backslash ""<<$ std::endl;

std::string lPhrase$2="$Be cool";

std::cout $<<$ "Second phrase: $\backslash ""<<$ lPhrase$2<<"\backslash ""<<$ std::endl;

std::string lEncoded$2$;

for $($char c : VigenereForwardIterator$($lKey$,$ lPhrase$2))$

$\{$

lEncoded$2+=$ c;

$\}$

std::cout $<<$ "Encoded text: $\backslash ""<<$ lEncoded$2<<"\backslash ""<<$ std::endl;

std::string lDecoded$2$;

for $($char c : VigenereForwardIterator$($lKey$,$ lEncoded$2,$ EVigenereMode::Decode$))$

$\{$

lDecoded$2+=$ c;

$\}$

std::cout $<<$ "Decoded text: $\backslash ""<<$ lDecoded$2<<"\backslash ""<<$ std::endl;

std::string lPhrase$3=""$;

std::cout $<<$ "Third phrase: $\backslash ""<<$ lPhrase$3<<"\backslash ""<<$ std::endl;

std::string lEncoded$3$;

for $($char c : VigenereForwardIterator$($lKey$,$ lPhrase$3))$

$\{$

lEncoded$3+=$ c;

$\}$

std::cout $<<$ "Encoded text: $\backslash ""<<$ lEncoded$3<<"\backslash ""<<$ std::endl;

std::string lDecoded$3$;

for $($char c : VigenereForwardIterator$($lKey$,$ lEncoded$3,$ EVigenereMode::Decode$))$

$\{$

lDecoded$3+=$ c;

$\}$

std::cout $<<$ "Decoded text: $\backslash ""<<$ lDecoded$3<<"\backslash ""<<$ std::endl;

std::cout $<<$ "done" $<<$ std::endl;

$\}$