代码如下
package com.bird.software;
/**
*
* @author Bird
*
*/
public class Test6 {
public static boolean isPrime(int x){
for(int i = 2; i <= x/2; i++){
if(x%i==0)return false;
}
return true;
}
public static int twinPrimeNum(int n){
int sum = 0;
for(int i = 2; i < n; i++){
if(isPrime(i)&&isPrime(i+2))
sum++;
}
return sum;
}
public static void main(String[] args){
System.out.println(twinPrimeNum(100));
}
}
运行结果如下
8