#include <stdio.h>

#define N 2

struct vector {
  float _[N];
};

int main()
{
  struct vector X;
  void AfficheVect (struct vector X);

  X._[0]= 1;
  X._[1]= 2.;

  AfficheVect(X);

  return 1;
}

void AfficheVect (struct vector X)
{

  for(int i=0; i<N ; i++)
    {
      printf("%f \n",X._[i]);
    }
  return;
}