You may create any number of classes.

You may edit the main() function.

Remove the variable string type completely from the entire program.

-- Note: Entire program includes all classes, all functions, and main().

Get rid of every if and if else statement completely from the entire program.

-- Note: Entire program includes all classes, all functions, and main().

accumulate(...), min_element(...), and max_element(...) are algorithms from the standard template library referenced with #include .

Hint: Use polymorphism.

Program:

#include

#include

#include

#include

using namespace std;

class ArrayFunction {

public:

ArrayFunction(const string& type) {

this->type = type;

}

float calculate(float array[], int size) {

if (type == "mean") {

float sum = accumulate(array, array + size, 0.0);

return sum / size;

}

else if (type == "min") {

return *min_element(array, array+size);

}

else if (type == "max") {

return *max_element(array, array+size);

}

else if (type == "first") {

return array[0];

}

return 0;

}

private:

string type;

};

int main() {

float array[] {1,2,3,7};

vector functions;

functions.push_back(new ArrayFunction("mean"));

functions.push_back(new ArrayFunction("min"));

functions.push_back(new ArrayFunction("max"));

functions.push_back(new ArrayFunction("first"));

for (int i = 0; i < functions.size(); i++) {

cout << functions[i]->calculate(array, 4) << endl;

delete functions[i];

}

return 0;

}

Example Output:

3.25

1

7

1