用C++打印浮点数的二进制表示

#include<iostream>
#include <bitset>

int main() {
    float num = 3.14;
    int int_part = static_cast<int>(num);
    float frac_part = num - int_part;

    std::bitset<32> int_bits(int_part);
    std::bitset<32> frac_bits;

    for (int i = 0; i < 23; i++) {
        frac_part *= 2;
        if (frac_part >= 1) {
            frac_bits[i] = 1;
            frac_part -= 1;
        }
    }

    std::bitset<32> sign_bit;
    sign_bit[31] = 0;

    std::bitset<32> exp_bits;
    exp_bits = int_bits.to_ulong() + 127;

    std::bitset<32> full_bits = sign_bit << 31 | exp_bits << 23 | frac_bits;

    std::cout << "Binary representation of "<< num << " is: "<< full_bits<< std::endl;

    return 0;
}