class useFib{
public static void main(String args[]){
	    int[] fib=new int[20];
	    int i;
	    fib[0]=1;    
                 fib[1]=1;
	    for(i=2;i<20;i++)
	          fib[i]=fib[i-1]+fib[i-2];
	    System.out.print("Fibonacciеǰ20Ϊ");
	    for(i=0;i<20;i++){
if(i%5==0)System.out.println();
		System.out.print(fib[i]+"\t");
	    }
}
}