c51点亮数码管显示报了好多错

Question

点亮数码管的程序，但是报了一大堆错，能不能看看怎么改啊

#include <REGX52.H>

unsigned char nixietable[]={0x3f,0x06,0x5b0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};

void nixie(unsigned char location,number)
{
    
    switch(location)
    {
        case 1:
            P2_2=1;P2_3=1;P2_4=1;break;
        case 2:
            P2_2=1;P2_3=1;P2_4=0;break;
        case 3:
            P2_2=1;P2_3=0;P2_4=1;break;
        case 4:
            P2_2=1;P2_3=0;P2_4=0;break;
        case 5:
            P2_2=0;P2_3=1;P2_4=1;break;
        case 6:
            P2_2=0;P2_3=1;P2_4=0;break;
        case 7:
            P2_2=0;P2_3=0;P2_4=1;break;
        case 8:
            P2_2=0;P2_3=0;P2_4=0;break;
        //default:
            //break;
    }
    P0=nixietable[number];
}

void main()
{
    
    
    while(1)
    {
        
    }
}

报错

Answer 1

把P2_2,P2_3,P2_4改成
P2^2，P2^3，P2^4