自定义函数

解题思路:求兄弟们看看哪里有问题，提示的是非法访问等

注意事项:

参考代码:

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

double x = sc.nextInt();

int n = sc.nextInt();

double dou = 0;

for (int i = 1; i <= n; i++) {

dou += mypow(x, i) / fact(i);

}

System.out.printf("%.4f", dou);

}

public static double fact(double n) {

double num = 1;

for (int i = 1; i <= n; i++) {

num = num * i;

}

return num;

}

public static double mypow(double x, double n) {

double data = 1;

int count = -1;

for (int i = 1; i <= n; i++) {

data = data * x;

}

for (int i = 1; i <= n; i++) {

count = count * (-1);

}

return count * data;

}