void postFixTester() {
string test = "a-(b+c*d)/e";
string postFix = "";
StackInterface<char>* stackPtr = new LinkedStack<char>(test.length());
for (int i = 0; i < test.length(); i++) {
char hold = test.at(i);
if(checkOperator(hold) == 2) {
postFix.append(string(1, hold));
} else if (hold == '(') {
stackPtr->push(hold);
} else if (checkOperator(hold) == 0) {
while(!stackPtr->isEmpty() && stackPtr->peek() != '(' && precedence(hold) <= precedence(stackPtr->peek())) {
postFix.append(string(1, stackPtr->peek()));
stackPtr->pop();
}
stackPtr->push(hold);
} else if (hold == ')') {
while (stackPtr->peek() != '(') {
postFix.append(string(1, stackPtr->peek()));
stackPtr->pop();
}
}
}
while (!stackPtr->isEmpty()) {
postFix.append(string(1, stackPtr->peek()));
stackPtr->pop();
}
cout << postFix << endl;
system("pause");
} // end postFixTester
