Example

class MyClass {
public:
MyClass(){
fnc(1);
fnc(1,2);
}
 
private:
void fnc(...){}
};

Solution
Instead of declaring variable argument funcitons, declare functions with the parameters that you need, or accept an array instead.

class MyClass {
public:
MyClass(){
fnc1(1);
fnc2(1,2);
}
 
private:
void fnc1(int one){}
void fnc2(int one, int two){}
void fncArray(int array[]){}

};