Question

C# 编一个程序，用while语句嵌套，求出1！+2！+…+5!之和

编一个程序，用while语句嵌套，求出1！+2！+…+5!之和

Answer 1

晕，只用一个循环就行了
int i=1;
int resule = 0;//结果
int current = 1;
while (i <= 5)
{
current *= i;
resule += current;
i++;
}

Answer 2

int sum = 0;
int c = 1;
while (c <= 5)
{
sum += c++;
}
sum就是结果

Answer 3

main()
{
int x=1,i=1,sum=0;
while( i<=5 )
{ x*=i; i++;
sum+=x; }
printf("%d",sum);
}

Answer 4

int i=1;
int count=0;
while(i<=5)
{
int j=i;
while(j>1)
{
j*=j-1;
j--;
}
count+=j;
i++;
}
count为所求值.

Answer 5

using System;

namespace csharpconsole
{
class Program
{
static void Main(string[] args)
{
int i = 1;
int sum = 0;
while (i <= 5)
{
int j = 1;
int tmp = 1;
while (j <= i)
{
tmp *= i;
j++;
}
sum += tmp;
i++;
}
Console.WriteLine("1! + 2! + 3! + 4! + 5! = {0}", sum);
}
}
}

追问

这才是正确的！！！ 不过谢谢你哈
int i = 1;
int sum = 0;
while (i <= 5)
{ int j = 1;
int m = 1;
while (j <= i)
{ m *= j;
j++;
}
sum += m;
i++;
}
Console.WriteLine("1! + 2! + 3! + 4! + 5! = {0}", sum);