C ++ tour-standard library function classification (2)

　　C ++The functions of the standard library are classified as follows:

1. Basic operation support. For example, Memory Allocation Management and runtime type information.
2. BothCStandard library. Very few changes were made to minimize the number of system violations.
3. String andI/OStream. It includes internationalization, localized character sets, and basic input/output stream operations.
4. Container and basic algorithms for providing containers. Container includesVector, list, mapAnd so on. Basic Algorithms include the most common traversal, sorting, and other basic operations.
5. Numeric operation.

Tips for using the Standard Library:

1. You don't have to re-invent the wheel to do everything and use the library.
2. Do not believe in miracles, understand what your database can do, how it will be done, and how much it will cost when it is done.
3. When you encounter a choice, you should first select the standard library instead of other libraries.
4. Do not think that the standard library is ideal for everything.
5. Use# IncludeThe header file of the function you want to use.
6. Remember, the features of the standard library are defined in the namespace.Std.
7. UseStringInsteadChar *.
8. If you suspect it, use a vector that checks the range.
9.  Vector <T>,List <T>, AndMap <key, value>Better than T.
10. To add an element to the container, usePush_backOrBack_inserter ().
11. UseVectorOfPush_back ()InsteadRealloc ().
12. InMain ()To capture Common exceptions.