public bool outS(long num) { double intSqrtOfNum = Math.Sqrt((double)num); int i = 0; for (i = 2; i < intSqrtOfNum; i++) //不懂这里为什么可以这样写 这样写比我写的少循环了好多次 { if (num % i == 0) break; } if (i > intSqrtOfNum) return true; return false; }main: int sum = 0; int count = 0; for (int i = 2; i < 1000; i++) { if (r.outS((long)i)) { Console.WriteLinei); sum = sum + i; count++; } } Console.WriteLine("The sum is:" + sum); Console.WriteLine("The count is:" + count);
public bool outS(long num) { double intSqrtOfNum = Math.Sqrt((double)num); int i = 0; for (i = 2; i < intSqrtOfNum; i++) //不懂这里为什么可以这样写 这样写比我写的少循环了好多次 { if (num % i == 0) break; } if (i > intSqrtOfNum) return true; return false; }main: int sum = 0; int count = 0; for (int i = 2; i < 1000; i++) { if (r.outS((long)i)) { Console.WriteLinei); sum = sum + i; count++; } } Console.WriteLine("The sum is:" + sum); Console.WriteLine("The count is:" + count);
我做了一下SP1234出的题 static void Main() { List<int> list = new List<int>(); list.Add(2); int count=0; int i = 2; bool iswhile = true; while(iswhile) { bool iszhishu = true; for (int j = 2; j < i; j++) { if (i%j==0) { iszhishu = false; break; } } if (iszhishu) { list.Add(i); } if (list.Count == 3000) break; i++; } for (int m = 0; m < list.Count; m++) { Console.WriteLine(list[m].ToString()); count += list[m]; } Console.WriteLine(count.ToString()); Console.ReadLine(); } 不知道能得几分~~
我做了一下SP1234出的题 static void Main() { List<int> list = new List<int>(); list.Add(2); int count=0; int i = 2; bool iswhile = true; while(iswhile) { bool iszhishu = true; for (int j = 2; j < i; j++) { if (i%j==0) { iszhishu = false; break; } } if (iszhishu) { list.Add(i); } if (list.Count == 3000) break; i++; } for (int m = 0; m < list.Count; m++) { Console.WriteLine(list[m].ToString()); count += list[m]; } Console.WriteLine(count.ToString()); Console.ReadLine(); } 不知道能得几分~~
我做了一下SP1234出的题 static void Main() { List<int> list = new List<int>(); list.Add(2); int count=0; int i = 2; bool iswhile = true; while(iswhile) { bool iszhishu = true; for (int j = 2; j < i; j++) { if (i%j==0) { iszhishu = false; break; } } if (!iszhishu) { list.Add(i); } if (list.Count == 3000) break; i++; } for (int m = 0; m < list.Count; m++) { Console.WriteLine(list[m].ToString()); count += list[m]; } Console.WriteLine(count.ToString()); Console.ReadLine(); } 不知道能得几分~~
using System; using System.Collections.Generic; using System.Text;namespace PrimeNumber { class Program { static void Main(string[] args) //打印从任一个数开始到任一个数结束的所有质数
{ int num1; int num2; int num=0; Console.WriteLine("时间:2007/11/1 版本:1.0 作者:向朝"); Console.WriteLine(""); Console.WriteLine("计算从N——>M的所有质数,并按格式将其打印出来!");
Console.WriteLine("请输入N的值:"); num1 = int.Parse(Console.ReadLine()); Console.WriteLine("请输入M的值:"); num2 = int.Parse(Console.ReadLine()); Console.WriteLine("你所需要打印的质数如下所示:"); for (int i = num1; i < num2;i++ ) {
bool result = true; for (int j = 2; j < i;j++ ) { if(i%j==0){ result = false; break; }
第30个素数是113。计算用时0毫秒。
第300个素数是1987。计算用时0毫秒。
第3000个素数是27449。计算用时6毫秒。
第509个素数是3637。计算用时0毫秒。
为什么第509大素数是3637?因为这个计算素数的程序使用static List<int>来记录运算中素数表,当计算第3000个素数时是从301个素数开始计算的,所以仅需要7毫秒(而单独计算时是9毫秒),计算509个素数不需要计算直接从素数表拿出结果。
{
double intSqrtOfNum = Math.Sqrt((double)num);
int i = 0;
for (i = 2; i < intSqrtOfNum; i++) //不懂这里为什么可以这样写 这样写比我写的少循环了好多次
{
if (num % i == 0)
break;
}
if (i > intSqrtOfNum)
return true;
return false;
}main:
int sum = 0;
int count = 0;
for (int i = 2; i < 1000; i++)
{
if (r.outS((long)i))
{
Console.WriteLinei);
sum = sum + i;
count++;
}
}
Console.WriteLine("The sum is:" + sum);
Console.WriteLine("The count is:" + count);
{
double intSqrtOfNum = Math.Sqrt((double)num);
int i = 0;
for (i = 2; i < intSqrtOfNum; i++) //不懂这里为什么可以这样写 这样写比我写的少循环了好多次
{
if (num % i == 0)
break;
}
if (i > intSqrtOfNum)
return true;
return false;
}main:
int sum = 0;
int count = 0;
for (int i = 2; i < 1000; i++)
{
if (r.outS((long)i))
{
Console.WriteLinei);
sum = sum + i;
count++;
}
}
Console.WriteLine("The sum is:" + sum);
Console.WriteLine("The count is:" + count);
static void Main()
{
List<int> list = new List<int>();
list.Add(2);
int count=0;
int i = 2;
bool iswhile = true;
while(iswhile)
{
bool iszhishu = true;
for (int j = 2; j < i; j++)
{
if (i%j==0)
{
iszhishu = false;
break;
}
}
if (iszhishu)
{
list.Add(i);
}
if (list.Count == 3000)
break;
i++;
}
for (int m = 0; m < list.Count; m++)
{
Console.WriteLine(list[m].ToString());
count += list[m];
}
Console.WriteLine(count.ToString());
Console.ReadLine();
}
不知道能得几分~~
static void Main()
{
List<int> list = new List<int>();
list.Add(2);
int count=0;
int i = 2;
bool iswhile = true;
while(iswhile)
{
bool iszhishu = true;
for (int j = 2; j < i; j++)
{
if (i%j==0)
{
iszhishu = false;
break;
}
}
if (iszhishu)
{
list.Add(i);
}
if (list.Count == 3000)
break;
i++;
}
for (int m = 0; m < list.Count; m++)
{
Console.WriteLine(list[m].ToString());
count += list[m];
}
Console.WriteLine(count.ToString());
Console.ReadLine();
}
不知道能得几分~~
static void Main()
{
List<int> list = new List<int>();
list.Add(2);
int count=0;
int i = 2;
bool iswhile = true;
while(iswhile)
{
bool iszhishu = true;
for (int j = 2; j < i; j++)
{
if (i%j==0)
{
iszhishu = false;
break;
}
}
if (!iszhishu)
{
list.Add(i);
}
if (list.Count == 3000)
break;
i++;
}
for (int m = 0; m < list.Count; m++)
{
Console.WriteLine(list[m].ToString());
count += list[m];
}
Console.WriteLine(count.ToString());
Console.ReadLine();
}
不知道能得几分~~
using System.Collections.Generic;
using System.Text;namespace PrimeNumber
{
class Program
{
static void Main(string[] args)
//打印从任一个数开始到任一个数结束的所有质数
{
int num1;
int num2;
int num=0;
Console.WriteLine("时间:2007/11/1 版本:1.0 作者:向朝");
Console.WriteLine("");
Console.WriteLine("计算从N——>M的所有质数,并按格式将其打印出来!");
Console.WriteLine("请输入N的值:");
num1 = int.Parse(Console.ReadLine());
Console.WriteLine("请输入M的值:");
num2 = int.Parse(Console.ReadLine());
Console.WriteLine("你所需要打印的质数如下所示:");
for (int i = num1; i < num2;i++ )
{
bool result = true;
for (int j = 2; j < i;j++ )
{
if(i%j==0){
result = false;
break;
}
}
if (!result)
{
continue;
}
num++;
if (num > 1 & (num - 1) % 10 == 0)
{
Console.WriteLine("");
}
Console.Write("{0,-4} ",i);
}
Console.WriteLine("");
Console.WriteLine("一共有{0}个质数!",num);
Console.ReadLine();
}
}
}