u3_1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication23
{
    class Program
    {
        static void Main(string[] args)
        {
            Random a = new Random();
            Random b = new Random();
            int correct_solution = 0;

            Console.WriteLine("The task is to solve 3 examples");

            for(int i=0; i<3; i++)
            {
                int a1 = a.Next(1, 9);
                int b1 = b.Next(1, 9);
                int sum = a1 + b1;

                Console.WriteLine("Pls caluclate the result!");
                Console.WriteLine("{0} + {1} = ", a1, b1);
                int sum1 = Convert.ToInt32(Console.ReadLine());

                if(sum1 == sum)
                {
                    Console.WriteLine(" {0} is correct", sum1);
                    correct_solution++;
                }
                else
                {
                    Console.WriteLine("the result is incorrect!");
                    Console.WriteLine("the correct answer is {0}", sum);
                }
            }
            Console.WriteLine("you have {0} correct answers", correct_solution);
        }
    }
}