Question

编程求s=1+(1+2)+(1+2+3)+(1+2+3+4)+……+(1+2+3+……+n)的值，n为一个从键盘输入的整数，且n大于等于3小于

编程求s=1+(1+2)+(1+2+3)+(1+2+3+4)+……+(1+2+3+……+n)的值，n为一个从键盘输入的整数，且n大于等于3小于等于10

Answer 1

declare @n int,@s int,@i int
set @n=1
set @s=0
set @i=0
while @n<=10
begin
set @i=@i+@n
set @s=@s+@i
set @n=@n+1
end
print @s

Answer 2

if (n<3) and (n>10)
{return }
int s;
s = 0;
for int i = 0 ; i<n-1; i++
{
s += (n-i)*(i+1)
}

Answer 3

用什么语言？

追问

C语言

Answer 4

//用C#写的：
static void Main(string[] args)
{
int sums = 0,sum = 0;
int n = Convert.ToInt32(Console.ReadLine());
for (int i = 1; i <= n; i++)
{
sum = 0;
for (int j = 1; j <= i; j++)
{
sum += j;
}
sums += sum;
}
Console.WriteLine("最后结果为：" + sums);
Console.ReadKey();
}