C++ 一个三位数的密码锁

#include 
using namespace std;

struct Lock
{
	int a;
	int b;
	int c;
};

Lock lock;

//246 1个正确，位置正确
int check1(Lock lock)
{
	//意思要么等于2，要么等于3，要么等于6
	for(int i=0;i<9;i++)

	if (lock.a == 2 && lock.b != 4 && lock.c != 6) return 1;
	if (lock.a != 2 && lock.b == 4 && lock.c != 6) return 1;
	if (lock.a != 2 && lock.b != 4 && lock.c == 6) return 1;
	return 0;
}
//258 1个正确，位置不正确
int check2(Lock lock)
{
	if ((lock.a == 5 || lock.a == 8) && lock.b != 2 && lock.b != 5 && lock.b != 8 && lock.