i really need help in a palindrome and binary conversion program..

In isPalindromeUsingIteration() function;
u r using the variable : "length" without declare it as global variable or inside the function .
in the same function , in the if condition;
[y + length - 1]
not all brackets are allowed like math :
(y + length - 1) // u must use every time the "(" and ")"

in the same function inside the if condition :
return false;
how return false while the function is void ?

same for this : return true;

++y ; no defined operation that increase or use this operator with strings .

return ispalindromeUsingRecursion(string y+1);
if u r trying to make recursion don't use the "return" just call the function directly .
and don't specify the type when calling the function , it should be :
ispalindromeUsingRecursion(y+1);

b[i]=b;
have no mean at all : assign a string to a specific char indexed by i ?

finally u missed the "}" at the end .
hope this helps ; after correcting those all , if u got more errors send them here .

thx alot..now there are 17 more errors to go..lol
the errors i get are the following:
error C2360: initialization of 'b' is skipped by 'case' label
(45) : see declaration of 'b'
(51) : error C2086: 'b' : redefinition
(56) : error C2360: initialization of 'b' is skipped by 'case' label
(51) : see declaration of 'b'
(56) : error C2360: initialization of 'b' is skipped by 'case' label
(45) : see declaration of 'b'
(58) : error C2361: initialization of 'b' is skipped by 'default' label
(51) : see declaration of 'b'
(58) : error C2361: initialization of 'b' is skipped by 'default' label
(45) : see declaration of 'b'
(114) : error C2059: syntax error : ']'
(115) : error C2143: syntax error : missing ';' before '{'
(118) : error C2675: unary '++' : 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' does not define this opera
tor or a conversion to a type acceptable to the predefined operator
(131) : error C2059: syntax error : ']'
(132) : error C2143: syntax error : missing ';' before '{'
(135) : error C2181: illegal else without matching if
(137) : error C2065: 'ispalindromeUsingRecursion' : undeclared identifier
(137) : error C2275: 'string' : illegal use of this type as an expression
c:\program files\microsoft visual studio\vc98\include\xstring(612) : see declaration of 'string'

and the program is now as this:

#include<iostream>
#include<string>
#include<cctype>
using std::string;
using std::cout;
using std::cin;
using std::endl;
int length;
// Here are some function declarations

unsigned short getMenuSelection( );
void binaryConversionUsingArithmeticOperators(unsigned long);
void binaryConversionUsingBitwiseOperators (unsigned long);
void isPalindromeUsingIteration(string);
void isPalindromeUsingRecursion(string);

// Utilityfunctions declarations
void initializeArray(unsigned short[],int);
void initializeArray(string[],int);
void printBinary(unsigned short[],int);
void printBinary(string[],int);

int main()
{
unsigned short choice;
do
{
choice = getMenuSelection();

cout <<"You chose Menu Option #"<<choice<<endl ;
switch(choice)
{
case 1 :
unsigned long a;
cout<<" Please enter an integer " ;
cin>>a ;
binaryConversionUsingArithmeticOperators(a);
break ;
case 2 :
cout<<" Please enter an integer " ;
cin >>a ;
binaryConversionUsingBitwiseOperators(a) ;
break ;
case 3 :
string b;
cout<<"Please enter a string ";
cin>>b;
isPalindromeUsingIteration(b);
break;
case 4:
string b;
cout<<"Please enter a string ";
cin>>b;
isPalindromeUsingIteration(b);
break;
case 5:
break;
default:
cout<<"you should never get here\a\a\a\a!!!";
}
}while(choice != 5);
cout<<"you choose to quit\a\a\a"<<endl;
return 0;
}

//function definitions
unsigned short getMenuSelection()
{
unsigned short selection=0;
do
{
cout<<"-1- Binary Conversion using Arithmetic Operators"<<endl;
cout<<"-2- Binary Conversion using Bitwise Operators"<<endl;
cout<<"-3- Testing for Palindroms Using Iteration"<<endl;
cout<<"-4- Testing for Palindroms Using Recursion"<<endl;
cout<<"-5- Quit"<<endl;
cout<<"please enter your selection <1-5>:"<<endl;
cin>>selection;
}
while(selection<1 || selection>5);
return selection;
}
void binaryConversionUsingArthematicOperators(unsigned long x)
{
unsigned short binaryDigit[100],
numberOfDigits=0;
initializeArray(binaryDigit,100);
do
{
binaryDigit[numberOfDigits++]=x%2;
x=x/2;
}while(x!=0);
printBinary(binaryDigit,numberOfDigits);
}

void binaryConversionUsingBitwiseOperator(unsigned long x)
{
unsigned short binaryDigit [100],
numberOfDigits=0;
initializeArray(binaryDigit , 100);
do
{
binaryDigit[numberOfDigits++]=x&1;
x=x>>1;
}while(x!=0);
printBinary(binaryDigit, numberOfDigits);
}

void isPalindromeUsingIteration(string y)
{
while (length>1)
{
if (y[] != [y + length - 1])
{
cout<<"false"<<endl;
}
++y;
length=length-2;
}
cout<<"true"<<endl;
}
void isPalindromeUsingRecursion(string y)
{
if ( length<2 )
{
cout<<"true"<<endl;
}
else
{
if ( y[] != [y + length - 1])
{
cout<<"false"<<endl;
}
else
{
cout<<ispalindromeUsingRecursion(string y+1)<<endl;
}
}

}
//utality function definitions
void initializeArray (unsigned short a[], int size)
{
for(int i=0;i<size; i++)
a[i]=0;
}

void printBinary(unsigned short a[], int size)
{
for(int i=size-1; i>=0; i--)
cout<<a[i];
cout<<endl;
}
void initializeArray (string b[], int length)
{
for(int i=0;i<length; i++)

}

void printBinary(string b[], int length)
{
for(int i=length-1; i>=0; i--)
cout<<b[i];
cout<<endl;
}
and by the way..im afraid there are errors in the structure of the program itself..plz try to read the code carefully and tell me where my mistakes are..thx alot..

ah the ispalindromeUsingRecursion() ; u should not tell the compiler "I want to use recursion" , it will not understand u !
the recursion are simply u call the function again with its name inside the same function like that :
type functionName(type)
{
functionName(value_supported_by_the_type); //here is a recurtion
}

About program logic try to have no errors first and see what is wrong in results and try to solve them, and if u have any problems send here .

hi
thx for the help..i really appreciate it..
to amahdy..well..im not really understanding what you mean..i would really be grateful if u retype my code and write the corrections or what you want me to do near statements itself..
to dcwexter..im afraid i cant use the function you gave me as the assignment states that we have to use the bool isPalindromeUsingRecursion..but anyway..thx alot..

thx alot sir..i tried the program and it worked..i have been trying to build it for 2 weeks..but it wasnt working everytime i try it..anyway..i have been trying to study what u have written really well..and there were new things that i dont know..i will try to improve my knowledge some more..thx