c51程序出现'＜'：bad operand type

#includesbit s=P1^0; //注意这里，s是为变量，只能是1和0sbit F=P0^1;void main(){while(1){if (s<127) //注意这里，s按字节型变量来处理了（char型）F=1;else F=0;} }