Untitled

Class Return Type Overloading
class data {
public:
    double error;
    double value;

    ...
}

...

data *outputs;

...

double lastValue = ...;
double someValue = ...;

for (int i = 0; i < n; ++i) {
    outputs[i] = someValue; //should be equivalent to outputs[i].value = someValue
    outputs[i].error = lastValue - someValue;
}

class data {
public:
    double error, value;

    void operator=(double d) { value = d; }
};

class data {
public:
    double error, value;
    data(double value_arg, double error_arg)
        : value(value_arg), error(error_arg) { }
};

outputs[i] = data(someValue, lastValue - someValue);