Simple questions for the experts

NewHSKid

Hi everyone, I wanted to know if someone could help me. I have a project with three different classes for three different dialogs(3 .cpp files). I have a variable that the user enters, which is in one of the classes (dialogs). I want to use that same variable with the stored information in my other dialog(class). How do I do that? Someone told me to pass a pointer, but i don't know how to exactly do that cause i get some error when i run the program. Thanks for helping me. Jimmy Just cause I am 15, doesn't mean I'm dumb! (I'll really be 4 on Feb. 29...the year 2004)

Babayan Hovhannes

You can declare your variable in global scope. 2) You can use pointer to the variable in the first class in the last two classes. yiy

NewHSKid

How would I use a pointer to the variable in the class so that the other classes could use it? Can you help me with this. I am new to programming, and am trying to teach myself with a book. (i'm only 15) Jimmy Just cause I am 15, doesn't mean I'm dumb! (I'll really be 4 on Feb. 29...the year 2004)

Babayan Hovhannes

I think, that the better way to do this is declare m_var as static variable. After that you can use this variable as CL1::m_var. ------------------------------------------------------------ class CL1 { public: CL1(); //constructor virtual ~CL1(); //destructor public: static int m_var; //your variable public: void SetVariable(int value) }; CL1::m_var=0; //linking will fail without this. CL1::Cl1() { } CL1::~CL1() { } void CL1::SetVariable(int value) { m_var=value; } #include using namespace std; int main() { CL1 myclass; int user_val; cin>>user_val; myclass.SetVariable(user_val); cout<<"After input "<

Bob Stanneveld

Hello, the following should work: In the dialog class add the following:

private:
VarType m_Var;
public:
VarType GetVar() {return m_Var;}

In the other classes at a point where you want to use the var add

// can only appear in functions and constructors
VarType var = YourClass.GetVar();

this should do the trick! Good luck! :)

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