关于浮点数、大小端的一些思考

#include <stdio.h>

typedef union TValuefields {struct {unsigned int v__;unsigned int t__;} i;double d__;} TValuefields;

int main(void){
    double f1=178.125;
    unsigned char* ch =(unsigned char*)&f1;
    int i;
    for(i=sizeof(double)-1;i>=0;i--)
    {
        unsigned int j =0 ;
        j=*(ch+i);
        int k;    
        for(k=0;k<8;k++){
            if(j>=128) printf("1");
            else printf("0");
            j <<=1;
            j&=255;    
        }    
    }

    TValuefields tv ;
    tv.d__=f1;

    printf("\n");

    printf("%u-%u",tv.i.t__,tv.i.v__);    

    printf("\n");
}