Stapelimplementierung
#include <iostream>
using namespace std;
int top = -1; //Globally defining the value of top as the stack is empty
void push (int stack[ ] , int x , int n)
{
if ( top == n-1 ) //If the top position is the last of position of the stack, this means that the stack is full.
{
cout << "Stack is full.Overflow condition!" ;
}
else
{
top = top +1 ; //Incrementing the top position
stack[ top ] = x ; //Inserting an element on incremented position
}
}
bool isEmpty ( )
{
if ( top == -1 ) //Stack is empty
return true ;
else
return false;
}
void pop ( )
{
if( isEmpty ( ) )
{
cout << "Stack is empty. Underflow condition! " << endl ;
}
else
{
top = top - 1 ; //Decrementing top’s position will detach last element from stack
}
}
int size ( )
{
return top + 1;
}
int topElement (int stack[])
{
return stack[ top ];
}
//Let's implement these functions on the stack given above
int main( )
{
int stack[ 3 ];
// pushing element 5 in the stack .
push(stack , 5 , 3 ) ;
cout << "Current size of stack is " << size ( ) << endl ;
push(stack , 10 , 3);
push (stack , 24 , 3) ;
cout << "Current size of stack is " << size( ) << endl ;
//As the stack is full, further pushing will show an overflow condition.
push(stack , 12 , 3) ;
//Accessing the top element
cout << "The current top element in stack is " << topElement(stack) << endl;
//Removing all the elements from the stack
for(int i = 0 ; i < 3;i++ )
pop( );
cout << "Current size of stack is " << size( ) << endl ;
//As the stack is empty , further popping will show an underflow condition.
pop ( );
}
Faithful Finch