Stack_Array_Pointer_With_Function

#include<stdio.h>

#define STACK_MAX 100

typedef struct{
    int top;
    int data[STACK_MAX];
}Stack;

void push(Stack *s,int item){

    if(s->top < STACK_MAX){
        s->data[s->top]=item;
        s->top = s->top+1;
    }else {
        printf("Stack is full!!\n");
    }
}

int pop(Stack *s){
    int item;

    if(s->top==0){
            printf("stack is Empty!!\n");
            return -1;
    } else {
        s->top = s->top - 1;
        item= s->data[s->top];
    }
    return item;
}

int main()
{
    Stack my_stack;
    int item;

    my_stack.top = 0;

    push(&my_stack,1);
    push(&my_stack,2);
    push(&my_stack,3);

    item=pop(&my_stack);
    printf("%d\n",item);

    item=pop(&my_stack);
    printf("%d\n",item);

    item=pop(&my_stack);
    printf("%d\n",item);
}