predefined string functions in c

  C/C ++ grand all (reproduced, original post address http://www.cnblogs.com/sevencat/archive/2004/06/10/14872.html)I. Standard definition macroThe standard predefined macros are specified by the relevant language standards, so they are available

　　With a simple understanding of the PHP data type in the previous article, we know the string type, this article will introduce the string functions commonly used in PHP.The string is a sequence of characters, such as "Hello world!".PHP String

arrays, strings, and databases are the most, most, and most commonly used functions in our functions, arrays and databases We haven't talked about it yet, and we'll come back to you when we talk about it.Of course, there are many string functions in

An object is called when it is instantiated. When _ construct and a function with the class name coexist, __construct will be called, and the other will not be called. 1. magic functions (13) 1. _ construct () An object is called when it is

Conditional Functions The following table provides some of the conditional functions that hive supports. return type Name of function Description T If (Boolean testcondition, T valuetrue, T Valuefalseornull)

C Language # define keywords, Conditional compilation and predefined symbolic knowledge details,I. pre-defined symbols The C standard defines the following five preprocessing symbols _ FILE _ // name of the source FILE to be compiled _ LINE

This article mainly sorts out the predefined interfaces of PHP, which are commonly used in the project process: IteratorAggregate (Iterator of aggregate Iterator), Countable, ArrayAccess, Iterator, you can refer to the following predefined

PHP predefined InterfaceIntroduction There are several predefined interfaces in PHP, And the IteratorAggregate (aggregate Iterator) IteratorAggregate extends Traversable {abstract public Traversable getIterator (void )} this interface implements a

Standard header files include: I. Standard definition ()The file contains some common definitions of the standard library, which are included automatically, regardless of which standard header file we include in the,.This file defines:L

Before you start, let's take a look at the following C ++ code.   // Definition of function read_file // return the file's data in string string read_file (string file_name = "test_data.txt ") { ifstream file (file_name.c_str (); ostringstream