public static void main(String[] args) {
System.out.print("请输入一个偶数：");
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
if (n % 2 != 0) {
System.out.println("您输入的不是偶数！");
return;
}
str(n);
}
public static void str(int n) {
for (int i = 2; i < n + 1; i++) {
if (isPrime(i) && isPrime(n - i)) {
System.out.println(n + "=" + i + "+" + (n - i));
break;
}
}
}
public static boolean isPrime(int m) {
boolean prime = true;
for (int i = 2; i < Math.sqrt(m) + 1; i++) {
if (m % i == 0) {
prime = false;
break;
}
}
return prime;
}