// chars.cpp -- hints on project 8
#include <iostream>
using namespace std;
int main()
{
    cout << "Enter your text (or end): ";
    string input; // declare variable
    getline(cin, input); // get one line of text from user

    // Example: print every other character
    for(int i = 0; i < input.length(); i += 2)
    {
        cout << input[i];
    }
    cout << endl;

    // Example: count occurrences of 'T' or 't'.
    int count = 0;
    for(int i = 0; i < input.length(); i++)
    {
        if(input[i] == 'T' || input[i] == 't' )
        {
            count++;
        }
        cout << "Char at " << i << " is "
             << input[i] << " count is "
             << count << endl;
    }
    cout << "There are " << count << " T's." << endl;

    // Example: count occurrences of 'N' or 'n' using switch
    count = 0;
    for(int i = 0; i < input.length(); i++)
    {
        switch(input[i])
        {
        case 'N':
        case 'n':
            count++;
        }
        cout << "Char at " << i << " is "
             << input[i] << " count is "
             << count << endl;
    }
    cout << "There are " << count << " N's." << endl;

    // Outline of a palindrome-testing loop
    int i = 0;
    int j = input.length() - 1;
    while(i < j)
    {
        cout << "Checking #" << i << "=" << input[i]
             << " vs #" << j << "=" << input[j]
             << endl;
        i++;
        j--;
    }

    return 0;
}

// funcdemo.cpp
#include <iostream>
using namespace std;

// Prototypes, aka forward declarations, "promise"
double triangle(double base, double height);
int square(int);

int main()
{
    cout << square(4) << endl;
    cout << square(square(square(5))) << endl;
    cout << triangle(5,9) << endl;
    return 0;
}

double triangle(double base, double height)
{
    return (base * height) / 2;
}

int square(int k)
{
    return k * k;
}