C++编程找出1到100之间的所有孪生素数

Question

第二题，求用简单的C++语句啊，大一小白，这是作业表示不会，帮帮忙，

Answer 1

#include
#include
#include
using namespace std;

bool isPrime(int num){
if ((num == 1) || (num == 2)) {
return true;
}

for (int i = 2; i <= num / 2; i++){
if (num % i == 0)
return false;
}
return true;
}

int main(){
int p1 = 2;
for (int p = 2; p <= 100; p++) {
if (isPrime(p)){
if (p - p1 == 2)
cout << "(" << p1 << ", " << p << ")" << endl;
p1 = p;
}
}
return 0;
}