stack

#include<stdio.h>
#include<stdlib.h>

typedef struct pointer{
  int info;
  struct pointer *link;
} MyType;
MyType *l,*p;
const n=4;
int d,i;
float s;
main()
{
  l=NULL;
  for(i=1;i<=n;i++)
  {
    p=(MyType *)malloc(sizeof(MyType));
    printf("\nPhantu %d:",i);
    scanf("%d",&p->info);
    if(l==NULL)
    {
      p->link = NULL;
      l=p;
    }
    else {
      p->link =l;
      l=p;
    }}
    s=0;
    d=0;
    p=l;
    while(p!=NULL)
    {
      if(p->info %2 ==0)
      {
    d++;
    s=s+p->info;
      }
      p=p->link;
    }
    if(d!=0) printf("TBC = %f", s/d);
    else printf("Khong co phan tu nao chia het cho 2");

}