C
#include <iostream>
#include <ctime>
#include <cstdlib>
#include <set>
using namespace std;
class TestC {
private:
int x;
int y;
public:
TestC(){
x=0;
y=0;
}
TestC(int xx, int yy=1){
x=xx;
y=yy;
}
};
int main(int argc, char** argv) {
set<TestC> b;
b.insert(3,3);
return 0;
}