#include <iostream>
#include <algorithm>
#include <string>
namespace ranges = std::ranges;

int main()
{
    std::string str1 = "abcdefghijk";
    std::string str2 = "abс";

    std::cout << std::boolalpha
              << ranges::starts_with(str1, str2) << std::endl;
}

See also

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TODO