import java.io.IOException;
import java.util.Scanner;
public class Stack_Char
{
char arr[];
int top;
Stack_Char()
{
arr=new char[30];
top=-1;
}
void Push(char val)
{
if(top==30)
System.out.println("Stack OVerflow");
else
arr[++top]=val;
}
char Pop()
{
if(top==-1)
{
System.out.println("Stack Underflow");
return 0;
}
else
{
return (char)arr[top--];
}
}
void Display()
{
if(top==-1)
System.out.println("Stack is Empty");
else
{
System.out.println("Stack is");
for(int i=0;i<=top;i++)
System.out.print((char)arr[i] + "-");
}
System.out.println(" ");
}
boolean isEmpty()
{
if (top<0)
return true;
else
return false;
}
public static void main(String[] args) throws IOException
{
Scanner in = new Scanner(System.in);
int ch;
char val;
Stack_Num s=new Stack_Num();
while(true)
{
System.out.println("Choose");
System.out.println("1 : Push\t2 : Pop\t3 : Display\t4 : Exit");
ch=in.nextInt();
switch(ch)
{
case 1:
{
System.out.println("Enter Value");
val=(char)System.in.read();
s.Push(val);
break;
}
case 2:
{
System.out.println("Popped Value is " + s.Pop());
break;
}
case 3:
{
s.Display();
break;
}
case 4:
{
System.exit(0);
}
default:
System.out.println("Wrong Choice");
}
}
}
}
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