backslash definition

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Mastering the use of backslash continuation in C + + programming _c language

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 sp

PHP Returns a function addslashes () with a backslash before a predefined character

Instance Add a backslash before each double quotation mark ("): <?php $str = addslashes (' What does ' yolo ' mean? '); Echo ($STR);?> Definition and usage The Addslashes () function returns a string that adds a backslash before a predefined

Php-pcre regular expression escape sequence (backslash)

Backslashes have several uses. First, if it is followed by a non-alphanumeric character, the special meaning that the character represents is canceled. This use of the backslash as an escape character is available both inside and outside the

PHP returns a string function that adds a backslash before the specified character addslashes ()

One, addslashes () function The 1.addslashes () function is a backslash before the specified predetermined character. Syntax: Addslashes (str); 2. The parameter is a string 3. There are four types of predefined characters: Single quotation mark ('),

PHP removes the backslash function added by the addslashes () function stripslashes ()

Instance To remove a backslash: <?phpecho stripslashes ("Who's Peter Griffin?");? > Definition and usage The Stripslashes () function deletes a backslash added by the addslashes () function. Tip: This function can be used to clean up data

PHP Returns a function addcslashes () that refers to the character before the backslash

instance Add a backslash before the character "W": <?php $str = addcslashes ("Hello world!", "W"); Echo ($STR);?> Definition and usage The Addcslashes () function returns a string that adds a backslash before the specified character. Note:

PHP adds backslash function Quotemeta () before some predefined characters in the string

Instance To add a backslash before a predefined character: <?PHP$STR = "Hello World". (Can you hear me?) "; echo Quotemeta ($STR);? > Definition and usage The Quotemeta () function adds a backslash before some of the predefined characters in

PHP removes the backslash function added by the addcslashes () function stripcslashes ()

Instance Remove the backslash in front of "world!": <?phpecho stripslashes ("Hello world!");? > Definition and usage The Stripcslashes () function deletes a backslash added by the addcslashes () function. Tip: This function can be used to

newline character "\" macro definition \ string multiple line writing

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,

Detailed definition of macro (#define)

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 definition

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