首先关于f(x)函数和g(x)函数,我是这样写的,效率肯定不高,但是反正能用 // 定义f(x)函数 public static int f(int x) { int sum = 0; int temp = x; while (temp != 0) { sum += temp % 10; temp /= 10; } return sum; } //定义g(x)函数 public static int g(int x) { int sum = 0; int temp = x; while (temp != 0) { s...