backslash definition

1 used in the macro definition: #define CV_ARE_SIZES_EQ (MAT1, mat2) \ ((mat1)->rows = = (MAT2)->rows && (mat1)->cols = = (MAT2)-> Cols 2 used in printf, sometimes the statement in printf is too long, need to be split, then use the

PHP extension text processing -- PCRE regular expression syntax 3 -- escape sequence (backslash) backlash has multiple usage. First, if it is followed by a non-alphanumeric character, it indicates that the special meaning represented by this

Instance Add a backslash before each double quotation mark ("): Definition and usage The Addslashes () function returns a string that adds a backslash before a predefined character. The predefined characters are: Single quotation mark (') Double

instance Add a backslash before the character "W": Definition and usage The Addcslashes () function returns a string that adds a backslash before the specified character. Note: the Addcslashes () function is case-sensitive. Note: Be careful when

Today, I checked some of the content in the header file provided by VC. Many statements are followed by backslashes. In my impression, only // indicates the annotation function, however, the backslash is only an escape character. But I have never

The phpstripcslashes () function is used to delete the backslash added by the addcslashes () function. This function can be used to clear data retrieved from a database or an HTML form, this article introduces the usage and basic instances of

Instance Remove the backslash in front of "world!": Definition and usage The Stripcslashes () function deletes a backslash added by the addcslashes () function. Tip: This function can be used to clean up data retrieved from a database or from an

When there is too much code in your code, it is especially inconvenient to read the code, and you need to use a newline character "\". Be aware of two points when using line breaks: The 1.c compiler is based on ";" To determine if it is a statement,

There are many places in the C language where macro definitions are used, such as in header files to prevent header files from being repeatedly included: #ifndef ctest_header_h #define CTEST_HEADER_H /header file content #endif Many macro

I used to think that the definition of macro is very simple, there is no long macro function, the most commonly used is the definition of Max (), when writing a macro function today, relative to Max (), A little bit longer, and then stepped on a