FP bit manipulation

shift_float.c

/* 
 * $ gcc shift_float.c
 * $ a.out
 */

#include <stdio.h>

void main() {
    float f = 3.0;
    long l;

    printf("begin : %f\n", f);

    l = *(long *)&f;
    l >>= 1;
    f = *(float *)&l;

    printf("lshift: %ld\n", l);
    printf("fshift: %f\n", f);
    return;
}