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c++/Others/A generic stack that holds two values..cpp

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+A generic stack that holds two values.
+#include <iostream>
+using namespace std;
+
+#define SIZE 10
+
+template <class StackType> class stack {
+  StackType stck[SIZE][2]; 
+  int topOfStack;          
+
+public:
+  void init() { topOfStack = 0; } 
+  void push(StackType ob, StackType object2); 
+  StackType pop(StackType &object2); 
+};
+
+template <class StackType>
+void stack<StackType>::push(StackType ob, StackType object2)
+{
+  if(topOfStack==SIZE) {
+    cout << "Stack is full.\n";
+    return;
+  }
+  stck[topOfStack][0] = ob;
+  stck[topOfStack][1] = object2;
+  topOfStack++;
+}
+
+template <class StackType> 
+StackType stack<StackType>::pop(StackType &object2)
+{
+  if(topOfStack==0) {
+    cout << "Stack is empty.\n";
+    return 0; 
+  }
+  topOfStack--;
+  object2 = stck[topOfStack][1];
+  return stck[topOfStack][0];
+}
+
+int main()
+{
+  stack<char> stack1, stackObject2;
+  int i;
+  char ch;
+
+  stack1.init();
+  stackObject2.init();
+
+  stack1.push('a', 'b');
+  stackObject2.push('x', 'z');
+  stack1.push('b', 'd');
+  stackObject2.push('y', 'e');
+  stack1.push('c', 'a');
+  stackObject2.push('z', 'x');
+
+  for(i = 0; i <3; i++) {
+    cout << "Pop stack1: " << stack1.pop(ch);
+    cout << ' ' << ch << endl;
+  }
+  for(i = 0; i <3; i++) {
+    cout << "Pop stackObject2: " << stackObject2.pop(ch);
+    cout << ' ' << ch << endl;
+  }
+
+  // demonstrate double stacks
+  stack<double> doubleValueStack1, doubleValueStack2;  // create two stacks
+  double d;
+
+  doubleValueStack1.init();
+  doubleValueStack2.init();
+
+  doubleValueStack1.push(1.1, 2.0);
+  doubleValueStack2.push(2.2, 3.0);
+  doubleValueStack1.push(3.3, 4.0);
+  doubleValueStack2.push(4.4, 5.0);
+  doubleValueStack1.push(5.5, 6.0);
+  doubleValueStack2.push(6.6, 7.0);
+
+  for(i = 0; i <3; i++) {
+    cout << "Pop doubleValueStack1: " << doubleValueStack1.pop(d);
+    cout << ' '<< d << endl;
+  }
+
+  for(i = 0; i <3; i++) {
+    cout << "Pop doubleValueStack2: " << doubleValueStack2.pop(d);
+    cout << ' '<< d << endl;
+  }
+
+  return 0;
+}