浮点数小记

// print float bits
#include <iostream>
using namespace std;

int main()
{
        float num = 0.15625;
        int n = *(int*)(void*)#
        cout<<(n)<<endl;
        for(int i = 0; i < 32; ++i) {
                if(n & (1<<(31-i))) cout<<1;
                else cout<<0;
        }
        cout<<endl;
        return 0;
}

(1.01)₂*2^(124-127) = 1.25 * 0.125 = 0.15625

对于浮点数一直有些不太明白，看了看博客就小记一下，以供以后查看