从C中的32位浮点数中提取位 [英] extract bits from 32 bit float numbers in C

问题描述

32位使用IEEE格式以二进制表示.那么如何提取这些位呢?像&这样的按位运算和|不要对他们工作！我基本上想做的是从opencv中的32位浮点图像中提取LSB提前谢谢！

32 bits are represented in binary using the IEEE format. So how can I extract those bits? Bitwise operations like & and | do not work on them! what i basically want to do is extract the LSB from 32 bit float images in opencv thanx in advance!

推荐答案

#include<stdio.h>
union abc
{
    float fo;
    unsigned int no;
};
int main()
{   
    union abc test;
    test.fo=36.5;
    unsigned int x=test.no;
    for( int i = 0; i < sizeof(float)*8; i++ )
    {
        printf("%d", x & 0x1);
        x = x >> 1;
    }

    return 0;
}

这是一种提取浮点数的方法！

this was a way to extract the bits of the float!

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