C + + Small Review

(1) When an array is passed as an argument to a function, the array is automatically degraded to a pointer of the same type. So pay attention to the sizeof operator inside the function.

(2) Print out the current source file name and the current line number of the source file: cout << __file__; cout<<__line__; __FILE__ and __line__ are system-predefined macros that are not defined in a file but are defined by the compiler.

(3) How to determine if a program is compiled by C compiler or C + + compiler?

#ifdef __cplusplus     " C + + " ; #else  "C";      #endif // _cplusplus

C + + Small Review