Proving that destructors get called.

destructor.cpp

#include <stdio.h>

class Thing{
public:
    int a;
    Thing(int);
    ~Thing();
};

Thing::Thing(int _a){
    a = _a;
}

Thing::~Thing(){
    printf("Destructor called.\n");
}

void foo();

int main(){
    foo();
}

void foo(){
    int i = 0;
    for(Thing t=Thing(5); i < 10; i++){
        if(i == t.a) return;
    }

    printf("Never gets here.\n");
}