2 records in above image are from Db, in above table Constraint are (SID and LINE_ITEM_ID), SID and LINE_ITEM_ID both column are used to find a unique record.
I have a question about union in C Language. The variables declared in a union will share the same memory, ok, I understand.
I have a class which has a union as one of its members. I also am a开发者_C百科 big fan of the copy/swap idiom. It occurred to me that there doesn\'t appear to be any correct (in the sense of the stan
This appears to be undefined behavior union A { int const x; float y; }; A a = { 0 }; a.y = 1; The spec says
This question already has answers here: Closed 11 years ago. Possible Duplicate: C/C++: When would anyone use a union? Is it basically a remnant from the C only days?
I saw some code as follows: class A { private: union { B *rep; A *next; }; // no variables of this anonymous defined!
I have the following code: #include <stdio.h> #include <stdlib.h> typedef union stateof stateof;
C开发者_高级运维an a union in C++ have a member function? How do union with data members and member functions exist if an object is created?
Take this code snippet as example: union stack { int a; float b; }; union stack overflow; overflow.a = 5; When i do a printf(\"%d\",overflow.b); i get zero on both gcc and turbo.
Hm... why is it that, when I print sizeof(struct MyStruct), it outputs 3 (instead of 2) for this code?