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Copy pathMyStack.java
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58 lines (51 loc) · 907 Bytes
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package dataStructure;
class Stack {
static final int MAX = 1000;
int top;
int a[] = new int[MAX];
boolean isEmpty() {
return (top<0);
}
Stack(){
top = -1;
}
boolean push(int x) {
if(top>= (MAX-1)) {
System.out.println(x+"pushed into stack");
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;
}
}
class MyStack{
public 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");
}
}
}