Linux Shell programming [essence]

0. Internal variables in the shell:

1. $?: Represents the return value of the shell command.
2. $$: Represents the PID of the current shell.
3. $!: The last PID value to be put into the background job.
4. $ A: Indicates the name of the script.
5. $1--$9,${10}: Represents the first to nineth parameter of the script, and the tenth parameter.
6. $#: Indicates the number of parameters.
7. $*,[email protected]: All parameters are indicated.

classType_info { Public:  Virtual~Type_info (); BOOL operator== (Consttype_info& RHS)Const; BOOL operator!= (Consttype_info& RHS)Const; BOOLBefore (Consttype_info& RHS)Const; Const Char* Name ()Const;Private: Type_info (Consttype_info&RHS); Type_info&operator= (Consttype_info&rhs);}; 

Linux Shell programming [essence]