冲浪网站优化 / Products Center

#include <iostream.h>
#include <math.h>
bool is_prime(int n)

{
int i,j;
for (i=2, j=sqrt(n); i<=j; i++)
if (n%i == 0) return false;
return true;

}
void print_prime(int n, int count)

{
cout << n << ‘,’;
if (count % 6 == 0) cout << endl;

} 
 void main()
{

int i,n,count=1;
cout << "请输入一个正整数："
cin >> n;  //从键盘输入一个正整数
if (n < 2) return -1;
cout << 2 << ",";  //输出第一个素数
for (i=3; i<n; i+=2)
{
if (is_prime(i))
{
count++;
print_prime(i,count); } }
cout << endl;

}