(Improve code) note the details when writing code 1~10 bar

This article will continue to be updated with experience gained in book records, online articles or work practices.

It can effectively improve the efficiency of your code, reduce code redundancy, and improve the code's objectivity (others view the code).

1. A member variable is initialized at the time of the constructor, as much as possible with initialization.

Class CTest
	{
	private://Initializes a member function at construction time, reducing the value of the assignment step
        ctest (): M_data (NULL) {}
        ~ctest ();
	Private:
		int m_data;	Data
        }

Initialize a member variable only once when the target is constructed

Class CTest
	{
        ctest () {m_data=null;}
        ~ctest ();
	Private:
		int m_data;	Data
        }

Initialize the member variable by default at Target construction, and then assign null to m_data for two numeric operations