Hallar la media mediana moda para n datos

float media(int *p, int n){
  float suma = 0.0;
  for (int i = 0; i < n; ++i)
    suma += *p;
    p++;
  return suma/n;
}

int main(){
  int num[100], *p;
  int n = 0;
  p = num;
  while(cin >> *p){
    p++;
    n++;
  }
  cout<< media(num, n);
}