enum SWITCH_FLAG {

   SWITCH_ALL_FLAG       = ,

   SWITCH_WEB_FLAG       = ,

   ……

 }

 unsigned int switch_by_bit_value = 0x7FFFFFFF;

 void switch_set_bit(int*a,int position,int flg)

 {

     int b=<<position;

     if(flg==){

         *a&=~b;

     }

     else{

         *a|=b;

     }

 }

 switch_set_bit(&switch_by_bit_value,SWITCH_WEB_FLAG,);

 switch_set_bit(&switch_by_bit_value,SWITCH_WEB_FLAG,);