void main_source(twointsclass &data){}void main(){twointsclass data;main_source(data);printIntLine(data.a);printIntLine(data.b);}
static void main_source(twointsclass &data){data.a=1;data.b=2;}static void main(){twointsclass data;main_source(data);printIntLine(data.a);printIntLine(data.b);}