_ Line __,__ file __,__ function __

Source: Internet
Author: User

The three macros _ line __,__ file __,__ function _ indicateProgramThe row number (integer type), file (string type), and function name (string type) may be useful in program debugging.

For example, add:

Printf ("% s (% d) -- % s", _ file __, _ line __, _ function __);

The file name, row number, and function name of the row can be printed.

 

In addition, in C language, when a string is connected, the two strings are respectively connected by "", and then put together.

For example, printf ("hello" "world"); spaces in quotation marks are not removed.

 

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