新手上路，请各位大神，交一下如何做这三道题[em07]
2016-11-30 17:48
程序代码：using System;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
double sum = 0;
for (int i = 1; i <= 100; i++)
{
sum += (1.0 / i);
}
Console.WriteLine("1/1 + 1/2 + 1/3 + 1/4 + ... + 1/100 = " + sum);
int s = 0;
int x = 1;
for (int i = 1; i <= 10000; i += x)
{
x += 2;
s += i;
}
Console.WriteLine("1 + 4 + 9 + 16 + ... + 10000 = " + s);
sum = 0;
x = 1;
for (int i = 0; i < 100; i++)
{
sum += (4.0 / x);
x += 2;
}
Console.WriteLine("4/1 + 4/3 + 4/5 + 4/7 + ... 前100项之和 = " + sum);
Console.Read();
}
}
}
2016-11-30 20:10
2016-11-30 22:58
2016-11-30 23:00
程序代码：using System;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
double sum = 0;
for (int i = 1; i <= 100; i++)
{
sum += (1.0 / i);
}
Console.WriteLine("1/1 + 1/2 + 1/3 + 1/4 + ... + 1/100 = " + sum);
int s = 0;
int x = 1;
for (int i = 1; i <= 10000; i += x)
{
x += 2;
s += i;
}
Console.WriteLine("1 + 4 + 9 + 16 + ... + 10000 = " + s);
sum = 0;
x = 1;
for (int i = 1; i <= 100; i++)
{
if (i % 2 == 0)
{
sum -= (4.0 / x);
}
else
{
sum += (4.0 / x);
}
x += 2;
}
Console.WriteLine("4/1 - 4/3 + 4/5 - 4/7 + ... 前100项之和 = " + sum);
Console.Read();
}
}
}
2016-11-30 23:25
感谢感谢
2016-12-01 10:29