救急！请问单片机C语言IO口如何定义啊

/**-------------------------------------------------------------------------------
〖说明〗配置文件
〖文件〗d:\user\BCB\C51BBS 仿真器\编程器\config.h ＠2002.07.05
〖作者〗新太科技 开发八部 张晓龙 E-mail: c51bbs@vip.163.com
〖修改〗 改为PICC用 叶存树 E-mail: ycs_5968@163.com
〖版本〗V1.00A Build 0705
---------------------------------------------------------------------------------*/
typedef unsigned char BYTE; //注意：有分号
typedef unsigned int WORD;
typedef unsigned long DWORD;

#define Byte unsigned char //注意：无分号
#define Word unsigned int
#define DWord unsigned long

#define bool bit
#define true 1
#define false 0
/**********************
sbit P0_0 = P0^0;
sbit P0_1 = P0^1;
sbit P0_2 = P0^2;
sbit P0_3 = P0^3;
sbit P0_4 = P0^4;
sbit P0_5 = P0^5;
sbit P0_6 = P0^6;
sbit P0_7 = P0^7;

sbit P1_0 = P1^0;
sbit P1_1 = P1^1;
sbit P1_2 = P1^2;
sbit P1_3 = P