// Demetrios Zeinalipour-Yazti
// cs10xx
// sec 24,29,30
// lab6

#include <cmath>
#include <iomanip>
#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

void main ()
{
	// variables declaration
	int op1, op2;		// the two generated operands for each operation
	int range, addition; 	// define the range of the generated randoms
	char type; 		// the type of output 'x'=multip, '+'=add

	// initialize the random function generator
	srand((unsigned)time(0));

	// make sure to get the appropriate answer from the user
	do
	{	cout << "Please select type of question ('x', '+') : ";
		cin >> type;
		if (type=='x' || type=='+')
		{  break; }
		else
		{  cout << "#Error - Only \'x\' & \'+\' are acceptable!\n"; }
	} while (true);

	// set the appropriate range
	// this is the formula for [start..end]
	// range = (end-start+1)
	if (type=='x')
	{   	// [1..100]
		range = 100;
		addition = 1;
	}
	else
	{	// [0..12]
		range = 13;
		addition = 0;
	}

	// generate and output 5 equations
	for (int i=0; i<5; i++)
	{	// generate 2 operands
		op1 = (rand() % range) + addition;
		op2 = (rand() % range) + addition;

		// output equation
	       	cout << setiosflags(ios::left) << setw(5) << op1
		     << " " << setw(5) << type
		     << " " << setw(5) << op2 << " =\n";
	}

}