Class IndeX cpp?

lets say my code looks like this:

[...]
class klasse{
public: 
int Var1;
int Var2;
};

klasse Klasse1;
klasse Klasse2;
klasse Klasse3;



Klasse1.Var1=1;
Klasse2.Var1=1;
Klasse3.Var1=1;
//now watch 
if(Klasse1.Var1==1)
{
Klasse1.Var2=1;
}
if(Klasse2.Var1==1)
{
Klasse2.Var2=1;
}
if(Klasse2.Var1==1)
{
Klasse2.Var2=1;
}

U understand the Problem?
i want to have a For-loop for the VaribleNames
Like this:

[...]
class klasse{
public: 
int Var1;
int Var2;
};


klasse Klasse1;
klasse Klasse2;
klasse Klasse3;



Klasse1.Var1=1;
Klasse2.Var1=1;
Klasse3.Var1=1;

for(int i=0; i<3; i++)
{
if(Klasse[i].Var1==1)
{
Klasse[i].Var2=1;
}
}

i tryed to do it with a vector but it does not work correcly, or how it shoud work, maybe im just to incompetent for that

>Solution :

Your idea of using a vector is a good one.

int main(void) {
    std::vector<klasse> klasses(3);

    for (int i=0; i<3; i++)
        klasses[i].var1 = 1;

    for (int i=0; i<3; i++)
        if (klasses[i].var1 == 1)
            klasses[i].var2 = 1;
}

Alternative, you could use range-based for loops:

    for (auto &k : klasses)
       if (k.var1 == 1)
           k.var2 = 1;