```cpp
#include <iostream>
using namespace std;
bool prime(int x)
{
for (int i = 2; i <= x - 1; i++)
{
if (x % i == 0) return 0;
}
return 1;
}
int main() {
int n;
cin >> n;
for (int i = 4; i <= n; i += 2)
{
for (int j = 2; j <= i; j++)
{
if (prime(j) && prime(i - j))
{
cout << i << "=" << j << "+" << i - j << endl;
break;
}
}
}
return 0;
}
```
by TLE_ZBR @ 2023-08-16 18:04:58
@[shensujin](/user/1063108) zs在=1后就不可能=0了，所以每次循环都要归零
by Nangu @ 2023-08-25 15:41:04
@[shensujin](/user/1063108)
```cpp
#include <iostream>
using namespace std;
int main()
{
int N,n,j,i,l;
int zs=0;
cin>>N;
for(i=1;i<=(N-2)/2;i++)
{
n=2*i+2;
for(j=2;j<=n;j++)
{
zs=0//这里
for(l=2;l<j;l++)
{
if((j%l==0)or((n-j)%l==0))
zs=1;
}
if(zs==0)
cout<<n<<"="<<j<<"+"<<(n-j)<<endl;
}
}
return 0;
}
by Nangu @ 2023-08-25 15:49:19