The header file I encountered

Cctype is generally used to process single character such as characters (if the character is a space output true value otherwise false) character transformation (case change)

String is basically the type of strings that can be

An array template class can generate a fixed-length array usage array< type name, number of elements > array name; Example: array<int,4>score={56,98,78,86}

A vector is a container class like a variable-length array vector< type name > array name (length) if the not-written length means that no member Vector.size can return the container length that is initialized after initialization can still be arbitrarily added delete

Iomanip is a function that controls input and output, such as stew (5) output five spaces and control the number of significant digits, etc.

Malloc.h is a dynamic storage allocation function header file that calls the relevant function when an operation is made to an internal store

• #include <malloc.h>= #include <alloc.h>
• Note: If the assignment succeeds, it returns a pointer to the allocated memory, otherwise the null pointer is null.
• Use the free () function to release memory blocks when memory is no longer in use.

• Different points of malloc and new

  　　 New Returns a pointer of the specified type, and can automatically calculate the desired size . For example:

  int *p;

  p = new int; The return type is the int* type (integer pointer), and the allocation size is sizeof (int);

  Or:

  Int* Parr;

  Parr = new int [100]; The return type is the int* type (integer pointer), and the allocation size is sizeof (int) * 100;

  malloc must be computed by us to calculate the number of bytes and then forcibly converted to a pointer of the actual type after the return .

  int* p;

  p = (int *) malloc (sizeof (int));

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The header file I encountered