Notes

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define max 5
int stack[max],top=-1;
char stack1[max],top1=-1;

void push()
{
int ele;
if (top<max-1)
{
printf ("Enter the value to be inserted:");
scanf ("%d",&ele);
stack[++top]=ele;
}
else
printf ("Stack is fulln");
}

void pop()
{
if (top!=-1)
printf ("the element deleted from the stack is %dn",stack[top--]);
else
printf ("Stack is emptyn");
}

void display()
{
int i;
if (top==-1)
{
printf ("Stack is emptyn");
}
else
{
printf ("Elements are:n");
for (i=0;i<=top;i++)
printf ("%dn",stack[i]);
}
}

void palindrome()
{
int i,count=0,len;
char str[100];
printf ("Enter the string to be checkedn");
scanf ("%s",&str);
len = strlen(str);
for (i=0;i<len;i++)
{
stack1[++top1]=str[i];
}
for (i=0;i<len;i++)
{
if (str[i]==stack1[top1--])
count ++;
}
if (count == len)
printf ("Palinn");
else
printf ("notn");
}

void main()
{
int choice;
while (1)
{
printf ("Enter choicen");
scanf ("%d",&choice);
switch (choice)
{
case 1: push();break;
case 2: pop();break;
case 3: display();break;
case 4: palindrome();break;
case 5: exit(1);break;
default: printf ("invalid choicen");
}
}
}