CDO

I have a problem of minimizing a function to optimize variables which 2 of them are depending on number of data point. for example, and for each data point, the routine must generate two solutions , one for x⁰ and one for x¹, and the rest of variables generate 1 set only , and for two data points the program must generate 4 solutions 2 for x⁰ and 2 for x¹, and 6 variables of one set , and so on .
I want to put bounds on x⁰ and x¹ depending on number of data points . For example for 3 data points I make the following but it does not work and the purpose is to bound only x⁰ and x¹ to data points and the rest of variables are constrained by other bounds:
enter code here

// for data point Number 1 to bound x[0]:
for (int i=0; i<=Ndata-2;i++){
for (int j=0; j<=Ndata-2;j++){

int ix0_= xx0_index(i,j);

x_l[ix0_] = lb_x01_;

x_u[ix0_] = ub_x01_;

}
}

// for data point Number 2 to bound x[0]:
for (int k=1; k<=Ndata-1;k++){
for (int m=1; m<=Ndata-1;m++){
int ix0_= xx0_index(k,m);
x_l[ix0_] = lb_x02_;
x_u[ix0_] = ub_x02_;

}
}
// for data point Number 3 to bound x[0]:

for (int k=2; k<=Ndata;k++){
for (int m=2; m<=Ndata-2;m++){
int ix0_= xx0_index(k,m);
x_l[ix0_] = lb_x03_;
x_u[ix0_] = ub_x03_;

}
}
}

creat a function member void Parameters(int N,double b_x01, double ub_x01, double lb_x02, double ub_x02)
in the base class as proctected function by using

protected:
void Parameters(int N,double b_x01, double ub_x01, double lb_x02, double ub_x02);
};
then I creat I dervied class from the base one
derived class: base class
// I define the lb_x01, ub_x01, lb_x02, ub_x02 by assigning value
b_x01= value1;
ub_x01= valu2;
lb_x02= value3;
lb_x02 = value4;
};

I when I call void Parameters(int N,double b_x01, double ub_x01, double lb_x02, double ub_x02) in file.cpp by making
void base class::parameters(int N,double b_x01, double ub_x01, double lb_x02, double ub_x02)
the compiler does not give these values. How can I resolve this please? How can I creat an instance of derived class for a sepcified member(i.e, lb_x01?
Please I need your help to advance because I have no time
Thank you;