1*f1fbf3c2SXin Li package test1; 2*f1fbf3c2SXin Li 3*f1fbf3c2SXin Li public class Cflow { run()4*f1fbf3c2SXin Li public int run() { 5*f1fbf3c2SXin Li return k1(4); 6*f1fbf3c2SXin Li } 7*f1fbf3c2SXin Li run2()8*f1fbf3c2SXin Li public int run2() { 9*f1fbf3c2SXin Li return fact(5); 10*f1fbf3c2SXin Li } 11*f1fbf3c2SXin Li fact(int n)12*f1fbf3c2SXin Li public int fact(int n) { 13*f1fbf3c2SXin Li if (n <= 1) 14*f1fbf3c2SXin Li return n; 15*f1fbf3c2SXin Li else 16*f1fbf3c2SXin Li return n * fact(n - 1); 17*f1fbf3c2SXin Li } 18*f1fbf3c2SXin Li k1(int i)19*f1fbf3c2SXin Li public int k1(int i) { 20*f1fbf3c2SXin Li if (i > 1) 21*f1fbf3c2SXin Li return k2(i - 1); 22*f1fbf3c2SXin Li else if (i == 1) 23*f1fbf3c2SXin Li return i; 24*f1fbf3c2SXin Li else if (i == 0) 25*f1fbf3c2SXin Li throw new RuntimeException(); 26*f1fbf3c2SXin Li else 27*f1fbf3c2SXin Li return -i; 28*f1fbf3c2SXin Li } 29*f1fbf3c2SXin Li k2(int i)30*f1fbf3c2SXin Li public int k2(int i) { 31*f1fbf3c2SXin Li if (i > 1) 32*f1fbf3c2SXin Li return k1(i - 1); 33*f1fbf3c2SXin Li else if (i == 1) 34*f1fbf3c2SXin Li return i; 35*f1fbf3c2SXin Li else if (i == 0) 36*f1fbf3c2SXin Li throw new RuntimeException(); 37*f1fbf3c2SXin Li else 38*f1fbf3c2SXin Li return -i; 39*f1fbf3c2SXin Li } 40*f1fbf3c2SXin Li } 41