bytes转换 kb mb

char* BytesToSize( float Bytes )        {             float tb = 1099511627776;             float gb = 1073741824;             float mb = 1048576;             float kb = 1024;             char returnSize[256];             if( Bytes >= tb )                 sprintf(returnSize, "%.2f TB", (float)Bytes/tb);                     else if( Bytes >= gb && Bytes < tb )                 sprintf(returnSize, "%.2f GB", (float)Bytes/gb);             else if( Bytes >= mb && Bytes < gb )                 sprintf(returnSize, "%.2f MB", (float)Bytes/mb);                else if( Bytes >= kb && Bytes < mb )                 sprintf(returnSize, "%.2f KB", (float)Bytes/kb);             else if ( Bytes < kb)                 sprintf(returnSize, "%.2f Bytes", Bytes);             else                 sprintf(returnSize, "%.2f Bytes", Bytes);             return returnSize;         }