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[marbac]

Hi,

i was just testing a class within main and was wondering why this works :


#include <iostream>

class testclass {
public:
testclass (int _test) : test(_test){};
private:
int test;
};


int main () {
testclass (8);
std::cout<<"Seems to work?"<<std::endl;
return 0;
}


My Question: What does "testclass (8);" do? (works without compilation
error with g++ (gcc) (3.3.3), stdout:"Seems to work?" ).

regards marbac

 

[Andrey Tarasevich]

...
int main () {
testclass (8);
std::cout<<"Seems to work?"<<std::endl;
return 0;
}


My Question: What does "testclass (8);" do? (works without compilation
error with g++ (gcc) (3.3.3), stdout:"Seems to work?" ).
...

'testclass (8)' is an expression statement that creates a temporary
object of type 'testclass'. The object is then immediately destroyed.
That's all.

 

[Mike Wahler]

Hi,

i was just testing a class within main and was wondering why this works :


#include <iostream>

class testclass {
public:
testclass (int _test) : test(_test){};
private:
int test;
};


int main () {
testclass (8);
std::cout<<"Seems to work?"<<std::endl;
return 0;
}


My Question: What does "testclass (8);" do?

Creates a type 'testclass' object, then immediately
destroys it.

error with g++ (gcc) (3.3.3), stdout:"Seems to work?" ).

It works. It's well-defined.

-Mike