CString string int char* 转换

nptr：　　Null-terminated string to convert

endptr：  Pointer to character that stops scan　　//___good way to separate number and alphabet

base：　  Number base to use

return value:　　On success, the function returns the converted integral number as a long int value.
If no valid conversion could be performed, a zero value is returned (0L).
If the value read is out of the range of representable values by a long int, the function returns LONG_MAX or LONG_MIN(defined in <climits>), and errno is set to ERANGE.

___ long atol( const char *str );// compared to above one,less powerful,and less safer

___ char * itoa ( int value, char * str, int base );

 

base:　　umerical base used to represent the value as a string, between 2 and 36, where 10 means decimal base, 16hexadecimal, 8 octal, and 2 binary.