#include <iostream>
#include <string>
using namespace std;
 
    void messagebox(const char*) {
        cout << "messagebox()" << endl;
    }
 
    struct tmp {
        tmp(const char* content) : content(content) { cout << "tmp c'tor" << endl; }
        ~tmp() { cout << "tmp d'tor" << endl; }
        const char* c_str() { return content.c_str(); }
    private:
        string content;
    };
 
    struct ss {
        tmp str() { return tmp("test"); }
    };
 
int main() {
	ss s;
	const char* name = s.str().c_str();
	messagebox(name);
 
	cout << endl << endl;
	messagebox(s.str().c_str());
 
	return 0;
}

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