Binary Cipher
//Program to implement Stacks
import java.util.*;
import java.io.*;
class Stack1
{
int t;
int a[]=new int[5];
Stack1()
{
t=-1;
}
boolean isempty()
{
return (t==-1);
}
boolean isfull()
{
return (t==5-1);
}
void push(int x)
{
a[++t]=x;
System.out.println(“nOne Element inserted in the stack”);
}
int pop()
{
System.out.println(“nOne element deleted from stack”);
return (t–);
}
void display()
{
int i;
System.out.print(“nElements in the stack are:”);
for(i=t;i>=0;i–)
System.out.print(a[i]+”,”);
}
}
class Stack
{
public static void main(String args[]) throws IOException
{
int m,n,x;
Scanner scr=new Scanner(System.in);
Stack1 s=new Stack1();
do
{
System.out.println(“n MENU”);
System.out.println(” ——“);
System.out.println();
System.out.println(“1.PUSHn2.POPn3.DISPLAYn4.EXIT”);
System.out.print(“nEnter your choice:”);
n=scr.nextInt();
switch(n)
{
case 1: if(s.isfull())
System.out.println(“nStack is Full”);
else
{
System.out.print(“nEnter any number into stack:”);
x=scr.nextInt();
s.push(x);
}
break;
case 2: if(s.isempty())
System.out.println(“Stack is empty”);
else
{
s.pop();
s.display();
}
break;
case 3: if(s.isempty())
System.out.println(“Stack is empty”);
else
s.display();
break;
case 4: break;
default:System.out.println(“Invalid choice”);
}
}while(n!=4);
}
}
Output:
MENU
———
1.PUSH
2.POP
3.DISPLAY
4.EXIT
Enter your choice:1
Enter any number into stack:10
One Element inserted in the stack