// Philip Fernandez
// Lab01 Question 1
// 8/21/2017

#include <iostream>
#include <cstdlib>
using namespace std;

// Function declarations
void getInput(int &, int &);
void outputOdd(int, int);
void outputSumOfEven(int, int);
void outputSquare(int, int);
void outputSumOfSquaresOfOdd(int, int);


int main() {
    // Declare ints for two numbers to be input
    int firstNum, secondNum;
    // Function calls
    getInput(firstNum, secondNum);
    outputOdd(firstNum, secondNum);
    outputSumOfEven(firstNum, secondNum);
    outputSquare(firstNum, secondNum);
    outputSumOfSquaresOfOdd(firstNum, secondNum);
    return 0;
}

// getInput takes two arguments by reference.
// This is so we can return values for firstNum and secondNum
// this function also provides a do while loop to validate
// that firstNum < secondNum
void getInput(int &num1, int &num2) {
    cout << "Enter an integer: ";
    cin >> num1;
    do {
        cout << "\nEnter an integer that is greater than " << num1 << ": ";
        cin >> num2;
    } while(num1 >= num2);
}

// outputOdd takes two arguments.
// this function displays all of the odd
// integers between firstNum and secondNum inclusive
void outputOdd(int num1, int num2) {
    cout << "\nAll of the odd integers between " <<
        num1 << " and " << num2 << ": ";
    for(int i = num1; i <= num2; i++) {
        if(i % 2 != 0) {
            cout << i << " ";
        }
    }
    cout << "\n";
}

// outputSumOfEven takes two arguments.
// this function calculates and displays
// the sum of all even numbers between
// firstNum and secondNum inclusive
void outputSumOfEven(int num1, int num2) {
    int sumOfEven = 0;
    for(int i = num1; i <= num2; i++) {
        if (i % 2 == 0) {
            sumOfEven += i;
        }
    }
    cout << "\nSum of all even integers between " <<
        num1 << " and " << num2 << ": " << sumOfEven << "\n";
}

// outputSquare takes two arguments
// this function displays firstNum and every
// consecutive integer after firstNum up to
// 10 integers past firstNum. The integer
// squared is also displayed.
void outputSquare(int num1, int num2) {
    cout << "\n";
    for(int i = num1; (i <= num2) && (i < num1 + 10); i++) {
        cout << i << ": " << i*i << " ";
    }
    cout << "\n";
}

// outputSumOfSquaresOfOdd takes two arguments.
// this functions calculates and displays
// the sum of all of the odd numbers squared
// between firstNum and secondNum inclusive
void outputSumOfSquaresOfOdd(int num1, int num2) {
    int sumOfSquaresOfOdd = 0;
    for(int i = num1; i <= num2; i++) {
        if(i % 2 != 0) {
            sumOfSquaresOfOdd += (i*i);
        }
    }
    cout << "\nSum of the square of all odd integers " <<
        "between " << num1 << " and " << num2 << ": " << sumOfSquaresOfOdd << "\n";
}