Generic Classes: demonstrates a generic stack. : template class « Class « C++






  1. C++
  2. Class
  3. template class

Generic Classes: demonstrates a generic stack.

   
#include <iostream>
using namespace std;
   
const int SIZE = 10;
   
template <class StackType> class stack {
  StackType stck[SIZE]; 
  int tos; 
   
public:
  stack() { tos = 0; } 
  void push(StackType ob); 
  StackType pop(); 
};

template <class StackType> void stack<StackType>::push(StackType ob)
{
  if(tos==SIZE) {
    cout << "Stack is full.\n";
    return;
  }
  stck[tos] = ob;
  tos++;
}

template <class StackType> StackType stack<StackType>::pop()
{
  if(tos==0) {
    cout << "Stack is empty.\n";
    return 0; // return null on empty stack
  }
  tos--;
  return stck[tos];
}
   
int main()
{
  stack<char> s1, s2;
   
  s1.push('a');
  s2.push('x');
  s1.push('b');
  s2.push('y');
  s1.push('c');
  s2.push('z');
   
  for(int i=0; i<3; i++) cout << "Pop s1: " << s1.pop() << "\n";
  for(int i=0; i<3; i++) cout << "Pop s2: " << s2.pop() << "\n";
   
  stack<double> ds1, ds2;
   
  ds1.push(1.1);
  ds2.push(2.2);
  ds1.push(3.3);
  ds2.push(4.4);
  ds1.push(5.5);
  ds2.push(6.6);
   
  for(int i=0; i<3; i++) cout << "Pop ds1: " << ds1.pop() << "\n";
  for(int i=0; i<3; i++) cout << "Pop ds2: " << ds2.pop() << "\n";
   
  return 0;
}








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