c++ stoi doesn't convert string correctly

Asked Apr 26 '20 at 17:19

Active Apr 27 '20 at 06:24

Viewed 128 times

#include <iostream>
#include <string>

int main() {

    std::string s = "3a3";

    try
    {
        int i = std::stoi(s);
        std::cout << i << '\n';
    }
    catch (std::invalid_argument const &e)
    {
        std::cout << "Bad input: std::invalid_argument thrown" << '\n';
    }
    catch (std::out_of_range const &e)
    {
        std::cout << "Integer overflow: std::out_of_range thrown" << '\n';
    }

    return 0;
}

out come is "3". there is alphabet after first 3. how did it converted...? also "10 10" is 10. It cannot catch the spaces in between.

asked Apr 26 '20 at 17:19

Kyo Heo

5

What you mean is that stoi doesn't convert a string **as you would like**. If you need something different, then you are going to have to write the code yourself. – john Apr 26 '20 at 17:21
2

Here are the rules on what stoi actually does, https://en.cppreference.com/w/cpp/string/basic_string/stol – john Apr 26 '20 at 17:22
what other output did you expect? – 463035818_is_not_a_number Apr 26 '20 at 17:26
Please read this [std::stoi, std::stol, std::stoll](https://en.cppreference.com/w/cpp/string/basic_string/stol) – DevO Apr 26 '20 at 17:28
Is "10 10" a number? – Oppen Apr 26 '20 at 17:33

c++ stoi doesn't convert string correctly

0 Answers0