#include <iostream>
    using namespace std;
        int main ()
    {
            int age, sumSoFar, ageCount1, ageCount2, ageCount3, ageCount4, ageCount5,
                    averageAge, maleCount, femaleCount, youngestAge, oldestAge;
            char gender;

            age = 0;
            ageCount1 = 0;
            ageCount2 = 0;
            ageCount3 = 0;
            ageCount4 = 0;
            ageCount5 = 0;
            maleCount = 0;
            femaleCount = 0;
            sumSoFar = 0;

            cout << "Enter the age of attendee (negative number to quit): ";
            cin >> age;

            youngestAge = age;
            oldestAge = age;

            cout << "Enter gender (M or F): ";
            cin >> gender;

            if (gender == 'M') {
                    maleCount = maleCount + 1;
            } else if (gender == 'F') {
                    femaleCount = femaleCount + 1;
            }



        while (age != -1){
                    sumSoFar= sumSoFar + age;
                if (age < youngestAge) {
                    youngestAge = age;
                } if (age > oldestAge) {
                            oldestAge = age;
                      }
                            if (age <=18 ) {
                            ageCount1++;
                    } else if (age <= 30 ) {
                            ageCount2++;
                    } else if (age <= 40 ) {
                            ageCount3++;
                    } else if (age <= 60 ) {
                            ageCount4++;
                    } else if (age >=61 ) {
                            ageCount5++;
                        }
                    cout << "Enter the age of attendee (negative number to quit): ";
                cin >> age;
                        if (age != -1) {
                        cout << "Enter gender (M or F): ";
                                cin >> gender;
                            if (gender == 'M') {
                                    maleCount = maleCount + 1;
                            } else if (gender == 'F') {
                                    femaleCount = femaleCount + 1;
                                    }
                            }
            }
            //maleCount = maleCount +1;
            cout << "age 0 to 18: " << ageCount1 << endl;
            cout << "age 19 to 30: " << ageCount2 << endl;
            cout << "age 31 to 40: " << ageCount3 << endl;
            cout << "over 60: " << ageCount5 << endl;
            cout << "age 41 to 60: " << ageCount4 << endl;
            averageAge = sumSoFar/(ageCount1 + ageCount2 + ageCount3 + ageCount4 + ageCount5);
            cout << "males: " << maleCount << endl
                     << "females: " << femaleCount << endl
                     << "The average age was " << averageAge << endl;
                    if (youngestAge == -1){
                cout<< "There is no youngest because an "
                    << "age can't be '-1'!";
                } else {
                                cout << "The youngest person in attendance was " << youngestAge << "." << endl;}
                            cout << "The oldest person in attendance was " << oldestAge << "." << endl;

            system ( "PAUSE" );
            return 0;
    }