#include <iostream> //for the objects cout and cin
#include <cstdlib>
#include <string>
#include "element.h"   //The implementation file always includes the header file.
using namespace std;

//The constructor installs 1 valid value into a newborn element object,
//or it outputs an error message and terminates the program.

element::element() {

	cout << "Please enter an integer 1 through 18: ";
	cin >> atomicNumber;

	cout << "\n";

        if (atomicNumber < 1 || atomicNumber > 18) {
                cerr << "Bad atomic number or element not part of first 18 elements.\n";
                exit(EXIT_FAILURE);
        }
	
	cout << "The atomic number you entered corresponds to " << elements[atomicNumber-1] << ".\n";
}

void element::row(int r) {

	if (atomicNumber < 3) {
		r=1;
	}

	else if (atomicNumber < 11) {
		r=2;
	}

	else {
		r=3;
	}

	cout << elements[atomicNumber-1] << " is in row " << r << " of the periodic table. " << elements[atomicNumber-1] << " has " << r << " electron shell(s).\n";

}

void element::column(int c, string t) {
	
	if (atomicNumber==1) {
		c=1;
	}

	else if(atomicNumber==2) {
		c=18;
	}
	
	else if(atomicNumber==3 || atomicNumber==4) {
		c=atomicNumber-2;
	}
	
	else if(atomicNumber > 4 && atomicNumber < 11) {
                c=atomicNumber+8;
        }

	else if(atomicNumber==11 || atomicNumber==12) {
                c=atomicNumber-10;
        }

	else {
                c=atomicNumber;
        }

	if (c==1) {
		t="n alkali metal";
	}

	else if (c==2) {
                t="n alkaline earth metal";
        }

	else if (c==13) {
                t=" icosagen";
        }

	else if (c==14) {
                t=" carbon family element";
        }

	else if (c==15) {
                t=" pnictogen";
        }

	else if (c==16) {
                t=" chalcogen";
        }

	else if (c==17) {
                t=" halogen";
        }

	else {
                t=" noble gas";
        }

	cout << elements[atomicNumber-1] << " is in column " << c << " of the periodic table. " << elements[atomicNumber-1] << " is a" << t << ".\n";

}