Help with string code

[leashbomb69]

My error : Undefined first referenced
symbol in file
main /usr/sfw/lib/gcc/sparc-sun-solaris2.10/3.4.3/crt1.o
ld: fatal: symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status

 This program prompts the user to enter a word, phrase, or sentence and determines whether the input string is a palindrome or not.

#include<vector>
#include <iostream>
#include <iomanip>
#include <string>
using namespace std; 
void toUpper(string & str, string & str1);
void removeNonAlphabets(string & str, string & str1);
bool isPalindrome(string &obj);

int main()
{
	string str, upperstr, alphastr;
	cout<< "Enter input to see if it is a palindrome" << endl;
	getline(cin, str);

cout<<"original input str contains" <<endl;
cout<<" "<< str <<endl;
toUpper(str, upperstr);
cout<<"after conversion to uppercase,input str becomes:"<<endl;
cout<<" "<<upperstr<<endl;
if(isPalindrome(alphastr))
	cout<<endl<<alphastr<<" is a palindrome!"<<endl;
else
	cout<<endl<<alphastr<<" is not a palindrome!"<<endl;
cout<<endl;
return 0;
}
void toUpper(string &str, string & upperstr)
{	
	int s = str.length();
	for(int i=0;i<s;i++)
	upperstr.push_back(toupper(str[i]));
}
void removeNonAlphabets(string &str, string &alphastr)
{
	int s=str.length();
	for(int i =0;i<s;i++)
	if(isalpha(str[i]))
	alphastr.push_back(str[i]);
}
bool isPalindrome(string &str)
{
	int s = str.length();
	for(int i=0;i<s/2;i++)
	if(str[i]!=str[s-i-1])
	return false;
	return true;
}

[Moschops]

Solaris; good for you.

Anyway, line 23 has an extra " in it and it all goes wrong from there.

[leashbomb69]

that didn't change the errors i have =/

[Moschops]

void toUpper(string &obj1 str, string &obj2 str);

This makes no sense at all.

Your code also contains a number of other compilation errors. Is you compiler giving you no warnings or error messages about them?

[leashbomb69]

I've made several changes, but idk what kind of error this is, no matter what i do, that is all I keep on getting !

[leashbomb69]

#include<vector>
#include <iostream>
#include <iomanip>
#include <string>
using namespace std; 
void toUpper(string & str, string & str1);
void removeNonAlphabets(string & str, string & str1);
bool isPalindrome(string &obj);

int main()
{
	string str, upperstr, alphastr;
	cout<< "Enter input to see if it is a palindrome" << endl;
	getline(cin, str);

cout<<"original input str contains" <<endl;
cout<<" "<< str <<endl;
toUpper(str, upperstr);
cout<<"after conversion to uppercase,input str becomes:"<<endl;
cout<<" "<<upperstr<<endl;
if(isPalindrome(alphastr))
	cout<<endl<<alphastr<<" is a palindrome!"<<endl;
else
	cout<<endl<<alphastr<<" is not a palindrome!"<<endl;
cout<<endl;
return 0;
}
void toUpper(string &str, string & upperstr)
{	
	int s = str.length();
	for(int i=0;i<s;i++)
	upperstr.push_back(toupper(str[i]));
}
void removeNonAlphabets(string &str, string &alphastr)
{
	int s=str.length();
	for(int i =0;i<s;i++)
	if(isalpha(str[i]))
	alphastr.push_back(str[i]);
}
bool isPalindrome(string &str)
{
	int s = str.length();
	for(int i=0;i<s/2;i++)
	if(str[i]!=str[s-i-1])
	return false;
	return true;
}

[leashbomb69]

why does this keep coming up "Undefined first referenced
symbol in file
main /usr/sfw/lib/gcc/sparc-sun-solaris2.10/3.4.3/crt1.o
ld: fatal: symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status"

Please help =/

[leashbomb69]

Please, I really don't even know what this error means.

[Diedes]

Hey, when I run in cpp 4.9 compiler, it runs fine.
However, when I fill in AGTT for example, (which is obviously not a palindrome), it says its a palindrome:P

[leashbomb69]

im using unix, so im not sure why this one isn't running and am getting those wierd errors, someone please help!! due tomorrow! =[

[Diedes]

Since I am having no problems, I think its a GCC error. Have you tried updating to the latest GCC version?

Maybe this is interesting for you?
http://stackoverflow.com/questions/662904/unix-symbol-referencing-error