古典问题:有一对兔子,从出生后第3个月起每个月都生一对兔子,小兔子长到第四个月后每个月又生一对兔子,假如兔子都不死,问每个月的兔子总数为多少?
兔子的规律为数列1,1,2,3,5,8,13,21....
public class Demo { |
public static void main(String args[]) { |
int i = 0 ; |
for (i = 1 ; i <= 12 ; i++) |
System.out.print(f(i) + " " ); |
} |
public static int f( int x) { |
if (x == 1 || x == 2 ) |
return 1 ; |
else |
return f(x - 1 ) + f(x - 2 ); |
} |
} |