Check out example codes for "convert long int to binary string c++". It will help you in understanding the concepts better.

Code Example 1

std::string str = std::bitset<8>(123).to_string();

Code Example 2

auto int_bits_size = 32; // maximum number of bits for the integer
auto some_integer = 123456789;
std::string str = std::bitset<int_bits_size>(some_integer).to_string();

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