Cast, CastBit

#include <stdio.h>

#define Cast(Type, Value) ((Type)(Value))
#define CastBit(Type, Value) (*Cast(Type *, &(Value)))

int main()
{
    unsigned int a = 0x40400000;
    float b = CastBit(float, a);
    printf("%f\n",b);
    return 0;
}