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string to int
c++
std::stoi (C++11)
- Convert string to unsigned integer
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2
| unsigned long stoul (const string& str, size_t* idx = 0, int base = 10);
unsigned long stoul (const wstring& str, size_t* idx = 0, int base = 10);
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- param
- str
- String object with the representation of an integral number.
- idx
- Pointer to an object of type size_t, whose value is set by the function to position of the next character in str after the numerical value.
- This parameter can also be a null pointer, in which case it is not used.
- base
- Numerical base (radix) that determines the valid characters and their interpretation.
- If this is 0, the base used is determined by the format in the sequence (see strtol for details). Notice that by default this argument is 10, not 0.
std::from_chars (c++17)
strtoul
- Interprets an unsigned integer value in a byte string pointed to by str.
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| unsigned long strtoul( const char *str, char **str_end, int base );
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- params
- str
- pointer to the null-terminated byte string to be interpreted
- str_end
- pointer to a pointer to character.
- base
- base of the interpreted integer value
c
atoi()
reference