//Cameron Pham             CS1A                       Chapter 3, P. 146, #15
//
/*******************************************************************************
 * 
 * Generate Random Addition Problems
 * _____________________________________________________________________________
 * 
 * This program acts as a math tutor for a young student. It generates two 
 * random numbers, pauses while the student solves it, and then displays the
 * correct answer.
 * 
 ******************************************************************************/
#include <iostream>
#include <cstdlib>		// Allows for usage of rand() and srand()
#include <ctime>		// Allows for usage of time()
using namespace std;
 
int main() 
{
	// Seed the random number generator and use the current time to make the 
	// numbers different each time the program is run.
	srand(static_cast <unsigned int> (time(0)));
 
	// Generate two random numbers between 100 and 999
	int number1 = rand() % 900 + 100;
	int number2 = rand() % 900 + 100;
 
	// Calculate the correct answer.
	int answer = number1 + number2;
 
	// Display the addition problem.
	cout << "Hi! I'm your personal 'Math Tutor'." << endl;
	cout << "Solve the following addition problem:" << endl;
 
	cout << "  " << number1 << endl;
	cout << "+ " << number2 << endl;
	cout << "---------" << endl;
 
	// Pause the program so the student has time to solve the problem.
	system("pause");
 
	// Display the correct solution.
	cout << endl;
	cout << "The correct answer is:" << endl;
 
	cout << "  " << number1 << endl;
	cout << "+ " << number2 << endl;
	cout << "---------" << endl;
	cout << "  " << answer << endl;
 
	return 0;
}

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