C++ Program read file into Stack and pop it into another file
#include
#include#include
#include#include
using namespace std;
using namespace std;
template
class DynStack
{
private:
struct StackNode
{
T value;
StackNode *next;
};
StackNode *top;
public:
DynStack()
{
top = NULL;
}
void push(T);
void pop(T &);
bool isEmpty();
};
//*********************************************************
// Member function push pushes the argument onto the stack. *
//*********************************************************
template
void DynStack::push(T num)
{
StackNode *newNode = NULL;
// Allocate a new node & store Num
newNode = new StackNode;
newNode->value = num;
// If there are no nodes in the list make newNode the first node
if (isEmpty())
{
top = newNode;
newNode->next = NULL;
}
else // Otherwise, insert NewNode before top
{
newNode->next = top;
top = newNode;
}
}
//*********************************************************
// Member function pop pops the value at the top of the stack off, *
// and copies it into the variable passed as an argument. *
//*********************************************************
template
void DynStack::pop(T &ch)
{
StackNode *temp = NULL;
if (isEmpty())
{
cout << "The stack is empty.\n";
}
else // pop value off top of stack
{
ch = top->value;
temp = top->next;
delete top;
top = temp;
}
}
//*********************************************************
// Member funciton isEmpty returns true if the stack *
// is empty, or false otherwise. *
//*********************************************************
template
bool DynStack::isEmpty()
{
bool status = false;
if (!top)
{ status = true; }
return status;
}
int main(int argc, char** argv) {
string inputFile = "file.txt";
ifstream obj(inputFile.c_str());
DynStack stack;
char ch;
cout<<"\n\n\n=======Content of input file file.txt =========== \n\n";
if(obj){
while(obj.get(ch)){
cout<<ch;
stack.push(ch);
}obj.close();
}
else{
cout<<"\nfile.txt not found. Create file.txt in current folder";
}
string outputFile = "output.txt";
ofstream file(outputFile.c_str());
char temp;
while(!stack.isEmpty())
{
stack.pop(temp);
file.put(temp);
}
file.close();
cout<<"\n\n\n========Content of Output file output.txt==========\n\n";
ifstream readOutputFile(outputFile.c_str());
ch = NULL;
while(readOutputFile.get(ch)){
cout<<ch;
}
readOutputFile.close();
cout<<endl;
return 0;
}
Reading file into Stack in C++
