#include<stdio.h>
#include<stdlib.h>
#define max 5
int stack[max],top=-1,input;
void insert(){
if(top==max-1){printf("STACK OVERFLOWS\n");}
else{
top++;
printf("ENTER THE VALUE TO INSERT\n");
scanf("%d",&stack[top]);
}
}
void display(){
if(top==-1){printf("STACK UNDERFLOW\n");}
else{
for(int i=0;i<=top;i++){printf("%d\n",stack[i]);}
}
}
void pop(){
if(top==-1){printf("STACK UNDERFLOW\n");}
else{
printf("%d is Deleted",stack[top]);
stack[top--];
}
}
void main(){
while(1){
printf("ENTER THE OPTION\n1-PUSH\n2-DISPLAY\n3-POP\n4-exit\n");
scanf("%d",&input);
switch(input){
case 1:insert();break;
case 2:display();break;
case 3:pop();break;
case 4:exit(1);
default:printf("INVALID INPUT\n");
}
}
}
