qq344577073的专栏

最近在看老师给的数据结构的代码，有对new与delete的重载，之前c++课没有讲过，所以详细看了一下，谁知竟然打开了新世界的大门QwQ。代码如下 void* operator new(size_t) { // Overloaded new operator if (freelist == NULL) return ::new Link; // Create space//如果freeli

This is a conservative extension if we consider each comma in a list of table_reference items as equivalent to an inner join. For example:SELECT * FROM t1 LEFT JOIN (t2, t3, t4)