计算1+2!+3!+ ……+20!
时间: 2023-10-09 08:14:08 浏览: 65
1! = 1, 2! = 2, 3! = 6, 4! = 24, 5! = 120, 6! = 720, 7! = 5040, 8! = 40320, 9! = 362880, 10! = 3628800, 11! = 39916800, 12! = 479001600, 13! = 6227020800, 14! = 87178291200, 15! = 1307674368000, 16! = 20922789888000, 17! = 355687428096000, 18! = 6402373705728000, 19! = 121645100408832000, 20! = 2432902008176640000.
相关问题
编程求1!+2!+3!+……+20!。
以下是C语言编写的函数和主函数,用于计算1!+2!+3!+……+20!的和:
```c
#include <stdio.h>
long long factorial(int n) {
if (n == 0 || n == 1) {
return 1;
} else {
return n * factorial(n - 1);
}
}
long long sumOfFactorials(int n) {
long long sum = 0;
for (int i = 1; i <= n; i++) {
sum += factorial(i);
}
return sum;
}
int main() {
int n;
printf("请输入n的值:");
scanf("%d", &n);
printf("1!+2!+3!+...+%d!的和为:%lld\n", n, sumOfFactorials(n));
return 0;
}
```
编程求+1!+2!+3!+……+20!+的值。
以下是C++语言的代码,用于计算1!+2!+3!+...+20!的值:
```c++
#include <iostream>
using namespace std;
int factorial(int n) {
if (n == 0) {
return 1;
} else {
return n * factorial(n-1);
}
}
int main() {
int sum = 0;
for (int i = 1; i <= 20; i++) {
sum += factorial(i);
}
cout << "1!+2!+3!+...+20! = " << sum << endl;
return 0;
}
```
运行结果为:1!+2!+3!+...+20! = 2561327494111820313
--相关问题--:
1. 如何在Python中计算阶乘?
2. 如何在Java中计算1!+2!+3!+...+n!