int main() {
IntStack s;
s.push(1);
s.push(2);
s.pop();
s.push(3);
s.pop();
s.push(4);
return 0;
}
int main() {
IntStack s;
s.push(1);
s.push(2);
s.push(3);
s.clear();
s.top();
s.pop();
return 0;
}
int main(int argc, char** argv) {
ifstream fileInput;
fileInput.open(argv[1]);
IntStack *stack = new IntStack();
int value;
while (fileInput.peek() != EOF) {
while ((fileInput.peek() != '\n') && (fileInput >> value)) {
stack->push(value);
}
fileInput.get(); // chomp the newline
while (!stack->isEmpty()) {
cout << stack->pop() << " ";
if (!stack->isEmpty()) {
stack->pop();
}
}
cout << endl;
}
}
int main()
{
IntStack intStack;
intStack.push(1);
intStack.push(2);
intStack.push(3);
while (!intStack.empty())
{
int t = intStack.top();
intStack.pop();
printf("%d\n", t);
}
intStack.push(4);
intStack.push(5);
while (!intStack.empty())
{
int t = intStack.top();
intStack.pop();
printf("%d\n", t);
}
return 0;
}
int main()
{
IntStack stack;
int curr;
char oper;
char tmp;
int right, left;
while(cin >> tmp)
{
if(isdigit(tmp))
{
cin.putback(tmp);
cin >> curr;
stack.push(curr);
}
else
{
oper = tmp;
right = stack.pop();
left = stack.pop();
switch (oper)
{
case '+':
stack.push(left + right);
break;
case '-':
stack.push(left - right);
break;
case '*':
stack.push(left * right);
break;
}
}
}
int main()
{
IntStack stack;
while(true)
{
string cmd;
cin >> cmd;
if(cmd == "push")
{
int elem;
cin >> elem;
stack.push(elem);
}
if(cmd == "pop")
{
stack.pop();
}
if(cmd == "top")
{
cout << stack.top() << " is at the top" << endl;
}
cout << stack << endl;
}
