整形与格雷码互转

整形转格雷码

x= (x>>1)^x

格雷码转整形（3种方法）

       static unsigned int GraytoDecimal(unsigned int x)
       {
          unsigned int y = x;
          while(x>>=1)
            y ^= x;
          return y;
       }
       static unsigned int GraytoDecimal(unsigned int x)
       {
          x^=x>>16;
          x^=x>>8;
          x^=x>>4;
          x^=X>>2;
          x^=x^1;
          return x;
       }
       static unsigned int GraytoDecimal(unsigned int x)
       {
         int i;
          for(i=0;(1<<i)<sizeof(x)*8;i++)
          {
             x^=x>>(1<<i);
         }
         return x;
       }

? staticunsignedint GraytoDecimal(unsignedint x) ? { ? unsignedint y = x; ? while(x>>=1) ? y ^= x; ? return y; ? } ? staticunsignedint GraytoDecimal(unsignedint x) ? { ? x^=x>>16; ? x^=x>>8; ? x^=x>>4; ? x^=X>>2; ? x^=x^1; ? return x; ? } ? staticunsignedint GraytoDecimal(unsignedint x) ? { ? int i; ? for(i=0;(1<<i)<sizeof(x)*8;i++) ? { ? x^=x>>(1<<i); ? } ? return x; ? }