skydoor questions

• sort() function in C++
• design a circle in the 3-D space
• How can I sort the vector elements using members as the key in C++
• How to group the records according to the range in SQL
• why are concrete types rarely useful as bases for further derivation
• How to get the printed information of a command in Shell Script
• The method used in 3rd-party garbage collector
• question about STL thread-safe and STL debugging
• pass static variable between two files in C/C++
• failed constructor and failed destructor in C++

skydoor answers