C语言实例解析：strtol()函数使用说明

    Name: strtol
    Prototype: long int strtol (const char *restrict string, char **restrict tailptr, int base)
    Description:
    The strtol (``string-to-long'') function converts the initial part of string to a signed integer, which is returned 
     as a value of type long int. 
    
    This function attempts to decompose string as follows: 
    
    
    	- A (possibly empty) sequence of whitespace characters. Which characters are whitespace is 
    	 determined by the isspace function . These are discarded.

    long int strtol (const char *restrict s