c# programming

write a program that will generate simple mathematical expressions that will add, subtract, and multiply two integers from 0 to . the program should ask the user for an answer. if the user answered correctly and after pressing enter, print "Correct" otherwise print "Incorrect" and then generate another question.

Try this:

using System;

class Program

{

static void Main()

{

int x, y;

while(true)

{

Console.Write("Enter first non-negative integer : ");

bool isValid = int.TryParse(Console.ReadLine(), out x);

if (!isValid || x < 0)

{

Console.WriteLine("Invalid, try again");

}

else

{

break;

}

while(true)

{

Console.Write("Enter second non-negative integer : ");

bool isValid = int.TryParse(Console.ReadLine(), out y);

if (!isValid || y < 0)

{

Console.WriteLine("Invalid, try again");

}

else

{

break;

}

int answer;

Console.WriteLine();

Console.Write("{0} + {1} = ", x, y);

int.TryParse(Console.ReadLine(), out answer);

if (answer == x + y)

{

Console.WriteLine("Correct");

}

else

{

Console.WriteLine("Incorrect");

}

Console.WriteLine();

Console.Write("{0} - {1} = ", x, y);

int.TryParse(Console.ReadLine(), out answer);

if (answer == x - y)

{

Console.WriteLine("Correct");

}

else

{

Console.WriteLine("Incorrect");

}

Console.WriteLine();

Console.Write("{0} x {1} = ", x, y);

int.TryParse(Console.ReadLine(), out answer);

if (answer == x * y)

{

Console.WriteLine("Correct");

}

else

{

Console.WriteLine("Incorrect");

}

Console.ReadKey();

}

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes12y ago
Try this:

using System;

class Program
{
static void Main()
{
int x, y;

while(true)
{
Console.Write("Enter first non-negative integer : ");
bool isValid = int.TryParse(Console.ReadLine(), out x);
if (!isValid || x < 0)
{
Console.WriteLine("Invalid, try again");
}
else
{
break;
}
}

while(true)
{
Console.Write("Enter second non-negative integer : ");
bool isValid = int.TryParse(Console.ReadLine(), out y);
if (!isValid || y < 0)
{
Console.WriteLine("Invalid, try again");
}
else
{
break;
}
}

int answer;
Console.WriteLine();
Console.Write("{0} + {1} = ", x, y);
int.TryParse(Console.ReadLine(), out answer);
if (answer == x + y)
{
Console.WriteLine("Correct");
}
else
{
Console.WriteLine("Incorrect");
}

Console.WriteLine();
Console.Write("{0} - {1} = ", x, y);
int.TryParse(Console.ReadLine(), out answer);
if (answer == x - y)
{
Console.WriteLine("Correct");
}
else
{
Console.WriteLine("Incorrect");
}

Console.WriteLine();
Console.Write("{0} x {1} = ", x, y);
int.TryParse(Console.ReadLine(), out answer);
if (answer == x * y)
{
Console.WriteLine("Correct");
}
else
{
Console.WriteLine("Incorrect");
}

Console.ReadKey();
}
}
kim justin eding12y ago
??