Stack Average

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

#define CAPACITY 100
typedef struct node
{
    int data;
    struct node *next;
}node ;
node*top;

int size = 0;

void push(int element)

{
    if (size >= CAPACITY)
    {
        printf("\tStack Overflow\n");
        return;
    }
    node *N = (node *) malloc(sizeof(node));
    N->data = element;

    N->next = top;


    top = N;

    ++size;

}

int pop()
{
    int data = 0,n;
    node *N;

    N = top;
    data = top->data;
    top = top->next;
    free(N);
    size--;
    return data;
}


int main()
{

    int t,data,i ,sum=0;
    int m,l,x;

    printf("TOTAL INPUT :");
    scanf("%d",&t);
    for(i=1; i<=t; i++)
    {
        scanf("%d",&data);
        push(data);
    }
    printf("TOTAL OUTPUT NUMBER :");
    scanf("%d",&m);
    for(l=0; l<m; l++)
    {
        x=pop();
        printf("%d\n",x);

        sum=sum+x;

    }

    printf("%.2f\n",(float)sum/m);

}