public int Pop(StackOption stackOption)
{
if (stackOption == StackOption.One && this.stackOneTop == -1)
{
return(-1);
}
if (stackOption == StackOption.Two && this.stackTwoTop == this.stackArray.Length)
{
return(-1);
}
int result = -1;
if (stackOption == StackOption.One)
{
result = this.stackArray[this.stackOneTop];
this.stackArray[this.stackOneTop] = 0;
this.stackOneTop--;
}
if (stackOption == StackOption.Two)
{
result = this.stackArray[this.stackTwoTop];
this.stackArray[this.stackTwoTop] = 0;
this.stackTwoTop++;
}
return(result);
}
public bool Push(int value, StackOption stackOption)
{
// deduct one from stack 2 top, as you cannot have both pointing to same index as it may overwrite the value.
if (stackOneTop == stackTwoTop - 1)
{
// stack is full
return(false);
}
if (stackOption == StackOption.One)
{
this.stackOneTop += 1;
this.stackArray[this.stackOneTop] = value;
}
if (stackOption == StackOption.Two)
{
this.stackTwoTop -= 1;
this.stackArray[this.stackTwoTop] = value;
}
return(true);
}
