Question

2）c++ 用穷举法找出1到100之间的质数.分别适用while,do-while,for循环语句实现.

要你的编程 我不要截图的

Answer 1

#include <iostream>
using namespace std;bool isprime_for(int n)
{
for (int i = 2; i<= n - 1; i++)
{
if (n % i == 0)
{
return false;
break;
}
else
return true;
}
}bool isprime_while(int n)
{
int i = 2;
while (i <= n - 1)
{
if (n % i == 0)
{
return false;
break;
}
else
return true;
i++;
}
}bool isprime_dowhile(int n)
{
int i = 2;
do
{
if (n % i == 0)
{
return false;
break;
}
else
return true;
i++;
}while(i <= n - 1);
}void main()
{
int n;
cin >> n;
cout << "for -> " << isprime_for(n) << endl;
cout << "while -> " << isprime_while(n) << endl;
cout << "do-while -> " << isprime_dowhile(n) << endl;
system("pause");
}