计算阶层和S=1!+2!+3!+...+N!
时间: 2023-11-17 22:03:32 浏览: 61
以下是两种计算阶层和S=1!+2!+3!+...+N!的方法:
方法一:使用for循环和递归函数计算阶乘和阶乘和S
```python
def factorial(n):
if n == 0:
return 1
else:
return n * factorial(n-1)
n = int(input("请输入n的值:"))
S = 0
for i in range(1, n+1):
S += factorial(i)
print("阶乘和S为:", S)
```
方法二:使用for循环计算阶乘和阶乘和S
```python
n = int(input("请输入n的值:"))
S = 0
a = 1
for i in range(1, n+1):
a *= i
S += a
print("阶乘和S为:", S)
```
相关问题
用Java设计一个多线程程序,求p=1!+2!+3!+4!+5!+6!+7!+8!+9!+10!,用十个线程分别求1!、2!...10!,在主线程中求这十个阶层的和。
以下是Java设计的多线程程序,用于计算p=1!+2!+3!+4!+5!+6!+7!+8!+9!+10!:
```java
public class FactorialThread extends Thread {
private int num;
private BigInteger result;
public FactorialThread(int num) {
this.num = num;
}
public BigInteger getResult() {
return result;
}
@Override
public void run() {
result = factorial(num);
}
private BigInteger factorial(int n) {
BigInteger res = BigInteger.ONE;
for (int i = 2; i <= n; i++) {
res = res.multiply(BigInteger.valueOf(i));
}
return res;
}
}
public class MainThread {
public static void main(String[] args) throws InterruptedException {
FactorialThread[] threads = new FactorialThread[10];
BigInteger sum = BigInteger.ZERO;
// 创建10个线程,分别计算1!到10!
for (int i = 0; i < threads.length; i++) {
threads[i] = new FactorialThread(i + 1);
threads[i].start();
}
// 等待所有线程执行完毕
for (FactorialThread thread : threads) {
thread.join();
sum = sum.add(thread.getResult());
}
System.out.println("1!+2!+3!+...+10! = " + sum);
}
}
```
1!+2!+3! +..+n!,求出前10项的阶层C语言
以下是C语言计算前10项阶乘和的代码:
```c
#include <stdio.h>
int main() {
int n = 10;
int sum = 0;
int factorial = 1;
for (int i = 1; i <= n; i++) {
factorial *= i;
sum += factorial; }
printf("前10项阶乘和为:%d\n", sum);
return 0;
}
```