PROGRAM TO IMPLEMENT STACK USING ARRAYS
/* Java program to implement basic stack
operations */
class Stack {
static final int MAX = 1000;
int top;
int a[] = new int[MAX]; // Maximum size of Stack
boolean isEmpty()
{
return (top < 0);
}
Stack()
{
top = -1;
}
boolean push(int x)
{
if (top >= (MAX - 1)) {
System.out.println("Stack Overflow");
return false;
}
else {
a[++top] = x;
System.out.println(x + " pushed into stack");
return true;
}
}
int pop()
{
if (top < 0) {
System.out.println("Stack Underflow");
return 0;
}
else {
int x = a[top--];
return x;
}
}
int peek()
{
if (top < 0) {
System.out.println("Stack Underflow");
return 0;
}
else {
int x = a[top];
return x;
}
}
}
// Driver code
class Main {
public static void main(String args[])
{
Stack s = new Stack();
s.push(10);
s.push(20);
s.push(30);
System.out.println(s.pop() + " Popped from stack");
}
}
OUTPUT:
10 pushed into stack
20 pushed into stack
30 pushed into stack
30 popped from stack
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