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      std::bitset<N>::to_ulong

      From cppreference.com
      <cpp‎ |utility‎ |bitset
       
       
      Utilities library
       
       
      unsignedlong to_ulong()const
      (constexpr since C++23)

      Converts the contents of the bitset to anunsignedlong integer.

      The first bit of the bitset corresponds to the least significant digit of the number and the last bit corresponds to the most significant digit.

      Contents

      [edit]Parameters

      (none)

      [edit]Return value

      The converted integer.

      [edit]Exceptions

      Throwsstd::overflow_error if the value can not be represented inunsignedlong.

      [edit]Example

      Run this code
      #include <bitset>#include <iostream>#include <stdexcept> int main(){for(unsignedlong i=0; i<10;++i){std::bitset<5> b(i);std::bitset<5> b_inverted= ~b;std::cout<< i<<'\t'<< b<<'\t'<< b_inverted<<'\t'<< b_inverted.to_ulong()<<'\n';} std::cout<<std::bitset<32>().to_string('-')<<'\n'; try{std::bitset<128> x(42);std::cout<< x.to_ulong()<<'\n';        x.flip();std::cout<< x.to_ulong()<<'\n';// throws}catch(conststd::overflow_error& ex){std::cout<<"ex: "<< ex.what()<<'\n';}}

      Possible output:

      0   00000   11111   311   00001   11110   302   00010   11101   293   00011   11100   284   00100   11011   275   00101   11010   266   00110   11001   257   00111   11000   248   01000   10111   239   01001   10110   22--------------------------------42ex: bitset to_ulong overflow error

      [edit]See also

      returns a string representation of the data
      (public member function)[edit]
      (C++11)
      returns anunsignedlonglong integer representation of the data
      (public member function)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/utility/bitset/to_ulong&oldid=161325"

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