KEIL C51报错syntax error near '='，请问怎么解决

Question

#include<reg52.h>
#include<intrins.h>
void main()
{P2^0 = 1 ;
P2^1 = 1 ;
while(1)
if(P2^0==0)
{
key_delay();
if(P2^0==0);
{
while(!P2^0);
P2^0=0;
}
}
if(P2^1==0)
{
key_delay();
if(P2^1==0)
{
while(!P2^1);
P2^0=1;
}
}
}

Answer 1

P2^0 你想表示什麽功能啊？