C + + Learning Note (iii) Library of functions

1. Standard library function begin end

• Begin returns the first address of the array
• End returns the end of the array address

2.const

• Restrict variables to read-only when declaring variables, not allowed to modify

• Const int i = 5;

• Single const scope for this file, by adding extern to all Files

  extern Const int 5;        // works on all files
  

3. Type declaration

1. typedef

   1 int test;        // Test is an alias of int 2 typedef test  otest,*p;        // Otest is the alias of Test, and P is the alias of int*

2. Alias statement

   1 using test=int;        // test is an int type alias

   　　

C + + Learning Note (iii) Library of functions