C++Talk.NET

Will Oram · Guest

Xcode, OS X's toolkit, compiles this, but chokes if anything (here, a '(
' char) is inputted. Its goal is to take an input string character by
character and put it in a linked list.

The output and error:

-------
EVALUATE THIS MATH EXPRESSION (no spaces or letters, please):
(
ZeroLink: unknown symbol '__ZN5StackIcE4pushERKc'

233_PA2_part2 has exited with status 1.
-------

...and the code (assume all pointers begin initialised as NULL):

-------
int main () {
Stack<char> myStack;

bool isValid = TRUE;

char expression[CAPACITY];
char currentChar = ' ';
char previousChar = ' ';

cout << "EVALUATE THIS MATH EXPRESSION (no spaces or letters, please):
n";
cin >> expression;

for (int j = 0; currentChar != ''; ++j) {
previousChar = currentChar;
currentChar = expression[j];

if(!evaluateChar(currentChar, previousChar, myStack))
isValid = FALSE;
} }
}
-------

...which eventually calls the push function through evaluateChar:

-------
template <class Item>
void Stack<Item>::push(const Item &entry) {
Node *newChar;
newChar = new Node;

Node *test;
test = new Node;

bottom_ptr = newChar;
newChar -> data = entry;
newChar -> next = NULL;

if(empty())
top_ptr = newChar;

for (test = top_ptr; test != NULL; test = test -> next)
cout << test -> data << endl;
}
-------

I think it has something to do with main; doing functionwide commenting
out shows that it runs fine if push but not main is commented out.

Thanks.