int stoi(const string& str, size_t* idx = 0, int base = 10);
long stol(const string& str, size_t* idx = 0, int base = 10);
unsigned long stoul(const string& str, size_t* idx = 0, int base = 10);
long long stoll(const string& str, size_t* idx = 0, int base = 10);
unsigned long long stoull(const string& str, size_t* idx = 0, int base = 10);
Effects: the first two functions call
strtol(str.c_str(), ptr, base),
and the last three functions call
strtoul(str.c_str(), ptr, base),
strtoll(str.c_str(), ptr, base), and
strtoull(str.c_str(), ptr,
base), respectively
. Each function returns the converted result, if any
.The
argument
ptr designates a pointer to an object internal to the function
that is used to determine what to store at
*idx.If the function does
not throw an exception and
idx != 0, the function stores in
*idx
the index of the first unconverted element of
str.Returns: The converted result
. Throws: invalid_argument if
strtol,
strtoul,
strtoll, or
strtoull reports that no conversion could be
performed
. Throws
out_of_range if
strtol,
strtoul,
strtoll or
strtoull sets
errno to
ERANGE,
or if the converted value is outside the range of representable values
for the return type
.float stof(const string& str, size_t* idx = 0);
double stod(const string& str, size_t* idx = 0);
long double stold(const string& str, size_t* idx = 0);
Effects: These functions call
strtof(str.c_str(), ptr),
strtod(str.c_str(), ptr), and
strtold(str.c_str(), ptr), respectively
. Each function returns
the converted result, if any
.The argument
ptr designates a pointer to
an object internal to the function that is used to determine what to store at
*idx.If the function does not throw an exception and
idx != 0,
the function stores in
*idx the index of the first unconverted element
of
str.Returns: The converted result
. Throws: invalid_argument if
strtof,
strtod, or
strtold reports that no conversion could be performed
. Throws
out_of_range if
strtof,
strtod, or
strtold sets
errno to
ERANGE
or if the converted value is outside the range of representable
values for the return type
.string to_string(int val);
string to_string(unsigned val);
string to_string(long val);
string to_string(unsigned long val);
string to_string(long long val);
string to_string(unsigned long long val);
string to_string(float val);
string to_string(double val);
string to_string(long double val);
Returns: Each function returns a
string object holding the character
representation of the value of its argument that would be generated by calling
sprintf(buf, fmt, val) with a format specifier of
"%d",
"%u",
"%ld",
"%lu",
"%lld",
"%llu",
"%f",
"%f",
or
"%Lf", respectively, where
buf designates an internal
character buffer of sufficient size
. int stoi(const wstring& str, size_t* idx = 0, int base = 10);
long stol(const wstring& str, size_t* idx = 0, int base = 10);
unsigned long stoul(const wstring& str, size_t* idx = 0, int base = 10);
long long stoll(const wstring& str, size_t* idx = 0, int base = 10);
unsigned long long stoull(const wstring& str, size_t* idx = 0, int base = 10);
Effects: the first two functions call
wcstol(str.c_str(), ptr, base),
and the last three functions call
wcstoul(str.c_str(), ptr, base),
wcstoll(str.c_str(), ptr, base), and
wcstoull(str.c_str(), ptr,
base), respectively
. Each function returns the converted result, if any
.The
argument
ptr designates a pointer to an object internal to the function
that is used to determine what to store at
*idx.If the function does
not throw an exception and
idx != 0, the function stores in
*idx
the index of the first unconverted element of
str.Returns: The converted result
. Throws: invalid_argument if
wcstol,
wcstoul,
wcstoll, or
wcstoull reports that no conversion could be performed
. Throws
out_of_range if the converted value is outside the range of representable values
for the return type
.float stof(const wstring& str, size_t* idx = 0);
double stod(const wstring& str, size_t* idx = 0);
long double stold(const wstring& str, size_t* idx = 0);
Effects: These functions call
wcstof(str.c_str(), ptr),
wcstod(str.c_str(), ptr), and
wcstold(str.c_str(), ptr),
respectively
. Each function returns the converted
result, if any
.The argument
ptr designates a pointer to an object internal to
the function that is used to determine what to store at
*idx.If the function
does not throw an exception and
idx != 0, the function stores in
*idx
the index of the first unconverted element of
str.Returns: The converted result
. Throws: invalid_argument if
wcstof,
wcstod, or
wcstold reports that no
conversion could be performed
. Throws
out_of_range if
wcstof,
wcstod, or
wcstold sets
errno to
ERANGE.wstring to_wstring(int val);
wstring to_wstring(unsigned val);
wstring to_wstring(long val);
wstring to_wstring(unsigned long val);
wstring to_wstring(long long val);
wstring to_wstring(unsigned long long val);
wstring to_wstring(float val);
wstring to_wstring(double val);
wstring to_wstring(long double val);
Returns: Each function returns a
wstring object holding the character
representation of the value of its argument that would be generated by calling
swprintf(buf, buffsz, fmt, val) with a format specifier of
L"%d",
L"%u",
L"%ld",
L"%lu",
L"%lld",
L"%llu",
L"%f",
L"%f",
or
L"%Lf", respectively, where
buf designates an
internal character buffer of sufficient size
buffsz.