浮点到二进制值(C++)

#include<iostream>
#include <bitset>
#include <cmath>

using namespace std;

int main() {
    float num = 3.14;
    unsigned int sign = 0;
    unsigned int exponent = 0;
    unsigned int mantissa = 0;

    // 获取符号位
    if (num < 0) {
        sign = 1;
        num = -num;
    }

    // 获取指数位和尾数位
    int exp = floor(log2(num));
    float mant = num / pow(2, exp) - 1;
    exponent = exp + 127;
    mantissa = (unsigned int)(mant * pow(2, 23));

    // 将二进制表示输出
    bitset<32> bits(0);
    bits.set(31, sign);
    bits.set(30, exponent >> 7);
    bits.set(29, (exponent >> 6) & 1);
    bits.set(28, (exponent >> 5) & 1);
    bits.set(27, (exponent >> 4) & 1);
    bits.set(26, (exponent >> 3) & 1);
    bits.set(25, (exponent >> 2) & 1);
    bits.set(24, (exponent >> 1) & 1);
    bits.set(23, exponent & 1);
    bits.set(22, mantissa >> 22);
    bits.set(21, (mantissa >> 21) & 1);
    bits.set(20, (mantissa >> 20) & 1);
    bits.set(19, (mantissa >> 19) & 1);
    bits.set(18, (mantissa >> 18) & 1);
    bits.set(17, (mantissa >> 17) & 1);
    bits.set(16, (mantissa >> 16) & 1);
    bits.set(15, (mantissa >> 15) & 1);
    bits.set(14, (mantissa >> 14) & 1);
    bits.set(13, (mantissa >> 13) & 1);
    bits.set(12, (mantissa >> 12) & 1);
    bits.set(11, (mantissa >> 11) & 1);
    bits.set(10, (mantissa >> 10) & 1);
    bits.set(9, (mantissa >> 9) & 1);
    bits.set(8, (mantissa >> 8) & 1);
    bits.set(7, (mantissa >> 7) & 1);
    bits.set(6, (mantissa >> 6) & 1);
    bits.set(5, (mantissa >> 5) & 1);
    bits.set(4, (mantissa >> 4) & 1);
    bits.set(3, (mantissa >> 3) & 1);
    bits.set(2, (mantissa >> 2) & 1);
    bits.set(1, (mantissa >> 1) & 1);
    bits.set(0, mantissa & 1);

    cout<< bits<< endl;

    return 0;
}