Answer Posted / puneettan

A Stack can be imagined as dinner plates put one over the
another.
'Push' means-- Inserting a new value(like putting a new
dinner plate on the top of the stack)
'Pop' means-- Removing(deleting) a value from the stack(just
like we remove a plate from the top of the stack)

A Stack follows L.I.F.O(Last In First Out).. This means, the
value which was last inserted into a stack would be the
first one to be removed. In the analogous case of dinner
plates, imagine that the plate kept last, on the top of
other plates will have to be removed first. you cannot
remove a plate at the bottom directly.

<--Program, same as given in 1st answer-->
//declaring the variables
char stack[10]
int top=-1;

//making a function for 'Push' mechanism
void push(char d)
{
if(to==9)
printf("stack is full");
else
stack[++top]=d;
}

//making a function for 'Pop' mechanism
char pop()
{
if(top==-1)
return('\0')
else
return(stack[top--]);
}

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