static twoints * main_source(twoints * data){data=new twoints;delete data;return data;}void main(){twoints * data;data=NULL;data=main_source(data);delete data;}
static twoints * main_source(twoints * data){data=new twoints;return data;}static void main(){twoints * data;data=NULL;data=main_source(data);delete data;}