Write the interface (.h file) of a class Averager containing: A data member named sum of type integer. A data member named count of type integer. A constructor accepting no parameters. A function named getSum that accepts no parameters and returns an integer. A function named add that accepts an integer parameter and returns no value. A function named getCount that accepts no parameters and returns an integer. A function named getAverage that accepts no parameters and returns a double.

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Click on the title for the solution
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This is the answer:

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class Averager
{
private:
int sum;
int count;
public:
Averager();
int getSum();
void add(int);
int getCount();
double getAverage();
};

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. . Click on the title for the solution . . This is the answer: : #include <iostream> #include <fstream> #include <string> using namespace std; void lookup(); void add(); int main() { string type; while (cin >> type) { if (type == "lookup") lookup(); else  add(); } return 0; } void lookup() { ifstream fin; fin.open("phonedir"); if(!fin.is_open()) cout << "Not Open" << endl; bool check = false; string name,firstName,lastName,email; cin >> name; while (fin >> firstName >> lastName >> email) { if (firstName== name || lastName==name) { cout<<firstName<<" "<<lastName<<" "<<email<<endl; check=true; } } if(!check) cout << name << ": not found" << endl; fin.close(); } void add() { ofstream fout; string name; string fir...
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