Stack Using Array

//Stack using Array
#include<bits/stdc++.h>
using namespace std;

struct Stack
{
       int size;
       int top;
       int *s;
       
};

void create(struct Stack *st)
{
     printf("Enter Size");
     scanf("%d",&st->size);
     st->top=-1;
     st->s=(int *)malloc(st->size*sizeof(int));
}


void Display(struct Stack st)
{
 for(int i=top;i>=0;i--)
  printf("%d",st.s[i]);
  printf("\n");
           
}

void push(struct Stack *st,int x)
{
     if(st->top==st->size-1)
        printf("Stack Overflow\n");
     else
     {
          st->top++;
          st->s[st->top]=x;
      }            
}   

int push(struct Stack *st)
{
    int x=-1;
    if(st->top==-1)
       printf("Stack Empty");
    else
    {
        x=st->s[st->top];
        st->top--;
    }      
    return x;
             
}       
int main()
{   struct Stack st;
    create(&st);
    
    
    push(&st,10);
    push(&t,20);
    push(&st,30);
    Display(st);
    printf("%d \n",pop(&st));
    return 0; 
}