How to use generate in c language

#include<stdio.h>
int main()
{
  long x, y, z;
  int i, n;
  x = 0;
  y = 1;
  printf("Enter the Number of Terms : ");
  scanf("%d",&n);
  printf("%1d ",y);
  for(i=1; i<n; i++)
  {
      z = x + y;
      printf("%1d ",z); 
      x = y;
      y = z;
  }
  printf("\n");
  return 0;
}

Enter the Number of Terms : 4
1 1 2 3