C ++ primer-array details

The length of the array 1 is fixed, and ProgramThe member cannot know the length of a given array.

2 If you want to change the length of the array, you can only create a larger new array, and then copy the elements of the original array to the new array space one by one.

3 compared with programs using the standard vector type, programs relying on built-in arrays are more prone to errors and difficult to debug.

4 In modern c ++, arrays are strictly restricted to internal use of the program. arrays are used only when the performance test shows that vector cannot meet the necessary speed requirements.

5. When accessing array elements with subscript, size_t should be used for the correct type of array objects.

6 when using arrays, you must ensure that the value is within the correct range.