long strtol ( const string &  str, string &  endptr, int  base = 10  )

inline

Convert string to long integer.

Parses the C string str interpreting its content as an integral number of the specified base, which is returned as a long int value.

The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. Then, starting from this character, takes as many characters as possible that are valid following a syntax that depends on the base parameter, and interprets them as a numerical value. A string containing the rest of the characters following the integer representation in str is stored in endptr.

If the first sequence of non-whitespace characters in str does not form a valid integral number, or if no such sequence exists because either str is empty or contains only whitespace characters, no conversion is performed.

Parameters

str	String beginning with the representation of an integral number.
endptr	Reference to a string, whose value is set by the function to the remaining characters in str after the numerical value.
base	Optional and ignored if specified.

Returns

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.

Warning

Only base = 10 is currently supported.

Examples:

ex_strtol.nxc.