Fixing a 'Invalid use of Member' Error in C++

[lewis198]

Hi guys, I was wondering if you could help me with the following:

1.I declare a class, then put public members into it.
2.Then I make member functions that return values that are computed from the values of other members. These functions would have no input, I guess, so I gave them none. I can actually compile up to this point.
3.Then I went onto the main part of the program, int main, and defined a class, and gave the members that are part of the other member functions values. I thought this would then give me a function that I could print values off, but when I tried to, the error message was:

'invalid use of member. Did you forget the '&'?'



The file looks like this:

class name
{

member 1
member 2
member n

member_function()
{}

}

int main()
{

class name x;
member1=value;
member2=value;
member3=value;

printf("%d",x.member_function);
}



Thanks for your time.

 

[basePARTICLE]

#3 should read:

3.Then I went to the main part of the program, int main(), instantiated a class, and gave the properties of that class, their proper values.

 

[Eus]

Hi Ho!

member1=value;
member2=value;
member3=value;

It should be:

x.member1=value;
x.member2=value;
x.member3=value;

because they belong to the object, not to the class.

Also,

printf("%d",x.member_function);

should be

printf("%d",x.member_function());

because you invoke a method.Eus

 

[KTC]

Assuming this is C++, there's a ';" after the closing brace of the class declaration, and you need to declare the various members to be public as otherwise they are private by default.

 

[lewis198]

thanks guys, appreciate it