using System; |
namespace 求整数1_n之间整数的阶乘的和_从键盘输入n的值 |
{ |
class Program |
{ |
static void Main() |
{ |
Console.WriteLine( "请输入整数n的值:" ); |
int n = int .Parse(Console.ReadLine()); |
int jc=1; |
int sum = 0; |
for ( int i = 1; i <=n; i++) |
{ |
jc*= i; |
sum += jc; |
} |
Console.WriteLine( "整数1-{0}之间整数的阶乘的和为{1}" ,n,sum); |
Console.ReadKey(); |
} |
} |
} |