//program illustrates use of nested loops to print a pattern of characters
//as an inverted triangle
//Author:  Carol Conway revised 10/2/2018
#include <iostream>
using namespace std;
int main()
{
    char ch;                //the fill character
    int maxRowWidth;        //the maximum width of the inverted triangle
    cout << "Enter character for pattern ";
    ch = cin.get();
    cout << "Enter the maximum width of the the triangle \n";
    cout << "This must be an odd number from 3 through 79 ";
    cin >> maxRowWidth;
    //input validation loop
    while (maxRowWidth < 3 or maxRowWidth > 79)
    {
       cout << "Enter an odd number (from 3 up to 79) ";
       cin >> maxRowWidth;
    }
    //make sure number of rows is odd by adding one to any even input value
    if (maxRowWidth % 2 == 0)
        maxRowWidth++;

    //outer loop controls output of the rows in the figure
    for (int i = 1; i <= maxRowWidth/2+ 1; i++)     // i is the current row number
    {
        //nested loop controls indentation by printing spaces
        for (int k = 1; k < i; k++)
            cout << " ";
        //nested loop controls printing one row of characters
        for (int j = 1; j < maxRowWidth-2*(i-1)+1;j++)  //j is the column position
            cout << ch;
        cout << endl;
    }
    return 1;
}