Find max in stack by R4R Team

What is Stack ?
Stack is a linear data structure which follows a particular order in which the operations are performed.
The order may be LIFO(Last In First Out) or FILO(First In Last Out).

How find maximum element in stack:
Function:

void maximum()
{
struct stack *ptr=top;
int ans=top->data;
while(ptr!=NULL)
{
if(ptr->data>ans)
ans=ptr->data;
ptr=ptr->back;
}
printf("Maximum is %d",ans);
}

program-

#include< stdio.h>
#include< conio.h>
#include< alloc.h>
struct stack
{
int data;
struct stack *back;
};
struct stack *top;

void create()
{
char ch;
struct stack *ptr,*cpt;
printf("Enter Number\n");
cpt=(struct node*)malloc(sizeof(struct stack));
scanf("%d",&cpt->data);
cpt->back=NULL;
do
{
printf("Enter Number\n");
ptr=(struct stack*)malloc(sizeof(struct stack));
scanf("%d",&ptr->data);
ptr->back=cpt;
cpt=ptr;
printf("Continue(y/n)?\n");
ch=getch();
}while(ch=='y');
top=cpt;
}

void traverse()
{
struct stack *ptr=top;
printf("Stack is :\n");
while(ptr!=NULL)
{
printf("%d ",ptr->data);
ptr=ptr->back;
}
}

void maximum()
{
struct stack *ptr=top;
int ans=top->data;
while(ptr!=NULL)
{
if(ptr->data>ans)
ans=ptr->data;
ptr=ptr->back;
}
printf("Maximum is %d",ans);
}

void main()
{
clrscr();
create();
traverse();
maximum();
getch();
}

output-

Enter Number
3
Enter Number
4
Continue(y/n)?
Enter Number
7
Continue(y/n)?
Enter Number
1
Continue(y/n)?
Stack is :
1 7 4 3
Maximum is 7

-In this program, we have a three function create(), traverse() and pop()
- create() function are used to create a stack
- traverse() function are used to traverse the stack
- maximum() function are used to find the maximum element of the stack.