Study Notes content from: Ditai Software College Tangzuo Lin teacher's video, I appreciate your guidance
The difference between the new keyword and malloc function:
1.new keywords are part of the C ++
2.malloc C library function is provided
3.new to the particular type of memory allocation units of
4.malloc bytes for memory allocation
5.new type in a single application It can be initialized when the variable
characteristic does not have memory initialization 6.malloc
7. Accordingly, the destructor will delete trigger object class, free not
C ++ namespaces:
1. Only a global scope in C language, all global identifiers share the same scope, possible conflicts between identifiers
2. The concept of namespaces in C ++ namespace global scope will be divided into different portion, a namespace identifier may be of the same name does not conflict with each other can be nested namespaces
3. global scope also called default namespace
4. when a plurality of files with the same name the general definition namespace, if the content of different , then added, if the content is the same, the link error
Instructions:
1. entire namespace: namespace name the using;
2. Use namespace variables: the using variable name ::;
3. the default namespace variables ::: variable
