JAVA小程序求助

先写个求阶乘的函数 int jieCheng(int n) 返回n的阶乘值

public static int jieCheng(int n) {
int result = 1;
for (int i = 1; i <= n; i++) {
result *= i;
}
return result;
}

然后写E=1+1/1!+1/2!+1/3!+....+1/N!... 那个函数如下：

public static double caculate(int n) {
double sum = 1.0;
for (int i = 1; i <= n; i++) {
sum = sum + 1.0 / jieCheng(i);
}

return sum;
}

OK了