void _main(){twoints * data;_union_type my_union;data=NULL;data=(twoints *)malloc(sizeof(data));data->a=1;data->b=2;my_union.a=data;{twoints * data=my_union.b;printStructLine(data);free(data);}}
static void main(){twoints * data;_union_type my_union;data=NULL;data=(twoints *)malloc(sizeof(*data));data->a=1;data->b=2;my_union.a=data;{twoints * data=my_union.b;printStructLine(data);free(data);}}