zebraman questions

• what's the difference between including a parameter name in a function declaration and not including one?
• is there a way to redirect the input and output to the same file?
• Is there a way to specify the dimensions of a nested STL vector C++?
• What is the most efficient way to determine if a directed graph is singly connected?
• How can I hash a string to an int using c++?
• What is the underlying data structure of a STL set in C++?
• How to make a shell script global?

zebraman answers