Maybe this:
#define CPlusPlus11 0
#if CPlusPlus11
int main()
{
std::uint32_t value(42);
std::bitset<32> bits(value);
std::cout << bits.to_string() << std::endl;
// Storing integral values in the string:
for(auto i: bits.to_string(char(0), char(1))) {
std::cout << (int)i;
}
std::cout << std::endl;
return 0;
}
#else
int main()
{
std::uint32_t value(42);
std::bitset<32> bits(value);
std::cout << bits.to_string() << std::endl;
char data[32];
for(unsigned i = 0; i < 32; ++i) {
data[i] = bits[i];
}
for(unsigned i = 32; i; --i) {
std::cout << int(data[i-1]);
}
std::cout << std::endl;
return 0;
}
#endif
Note: Your expressions bitset<32>(N) = data1
and bitset<32>(N[i])
are code smell.