VC++ Winforms reading input from textbox and converting to int

[RE9741]

Hey, basically I'm trying to read a user's input from a textbox and define that input as an integer. The problem I'm having is I get this error when I run the code: http://gyazo.com/ec464cd6ab07d090fc2a7650a1670021

Here is the code I am using:

private: System::Void btnStart_Click(System::Object^  sender, System::EventArgs^  e) {
				 this->num1->Visible = true;
				 this->num2->Visible = true;
				 this->add->Visible = true;
				 this->equals->Visible = true;
				 this->textBox1->Visible = true;
				 this->btnRestart->Visible = true;
				 this->labScore->Visible = true;
				 this->numScore->Visible = true;
				 this->btnStart->Text = "Next";

				 int firstNum;
				 int secondNum;
				 int answer;
				 int correct;
				 int score;

				 answer = System::Convert::ToInt32(textBox1->Text); // THIS IS THE LINE PRODUCING THE ERROR
				 firstNum = rand()%10+1;
				 secondNum = rand()%10+1;
				 correct = firstNum+secondNum;
					
				 this->textBox1->Clear();
				 this->num1->Text = System::Convert::ToString(firstNum);
				 this->num2->Text = System::Convert::ToString(secondNum);

				 if (answer == correct) {
					 score++;
				 }

				 this->numScore->Text = System::Convert::ToString(score);

		 }

[R23MJ]

Try this:

Int32::TryParse(textBox1->Text,answer);

[RE9741]

That worked in removing the error, but now I have another problem, when I answer the question correctly (correct being defined by firstNum+secondNum) the score isn't incremented so the if statement isn't executed.
Updated Code

private: System::Void btnStart_Click(System::Object^  sender, System::EventArgs^  e) {
				 this->num1->Visible = true;
				 this->num2->Visible = true;
				 this->add->Visible = true;
				 this->equals->Visible = true;
				 this->textBox1->Visible = true;
				 this->btnRestart->Visible = true;
				 this->labScore->Visible = true;
				 this->numScore->Visible = true;
				 this->btnStart->Text = "Next";

				 int firstNum;
				 int secondNum;
				 int answer;
				 int correct
				 int score;

				 answer = Int32::TryParse(textBox1->Text,answer); // Editted to remove Error.
				 firstNum = rand()%10+1;
				 secondNum = rand()%10+1;
				 correct = firstNum+secondNum; // Being defined
					
				 this->textBox1->Clear();
				 this->num1->Text = System::Convert::ToString(firstNum);
				 this->num2->Text = System::Convert::ToString(secondNum);

				 if (answer == correct) { // Checking if the user input is the same as correct)
					 score++;
				 }

				 this->numScore->Text = System::Convert::ToString(score);

		 }

[R23MJ]

Line 15 correct is missing the ;

[RE9741]

Fixed it, still no improvement I'm afraid.

[R23MJ]

What error are you getting?

[R23MJ]

Also, with the new code I provided, answer = on line 18 shouldn't be needed, try taking that off. Not sure what will happen.

[RE9741]

No error, the code just skips the if statement even though I'm meeting it's requirements. Here is the exact same concept in console c++. It works perfectly:

int main() {
    int answer;
    int correct;
    int incorrect;
    int num1;
    int num2;

    num1 = rand()%10 + 1;
	num2 = rand()%10 + 1;
    correct = num1+num2;

    cout << "What is " << num1 << "+ " << num2 << endl;
    cin >> answer;

    if (answer == correct) {
            cout << "Correct" << endl;
    }

    return 0;
}

My problem in winforms is that even though answer IS EQUAL to correct. It's just not completing the contents of the if block.

[R23MJ]

I think it is not converting answer correctly, take "answer =" out of line 18, that is what the "answer" at the end of the line is for.

[RE9741]

Tried that also, still didn't fix it. However if I change Line 21 to: Correct = 1; And then input 1 to the textbox it increments the score and does what it's supposed to. So I believe the problem lies in line 21. Any ideas?

[R23MJ]

Can you PM the project in a ZIP file to me, first I am interested in playing the game, I have trouble with quick math, second, it will make it easier for me to search for problems.

[R23MJ]

Ahhh, move the contents of line 18 under the contents of line 20:

firstNum = rand()%10+1;
secondNum = rand()%10+1;
answer = Int32::TryParse(textBox1->Text,answer); // Editted to remove Error. 

[RE9741]

Done

[R23MJ]

Did it work?

[RE9741]

Afraid not

[RE9741]

Any other ideas? I'm stumped here

[R23MJ]

I found the problem using step-debugging, searching for a solution now.

[R23MJ]

Got, the solution was not simple, I will repack it and send it back, examine it closely, let me know in a PM if you want to know how something works!

[R23MJ]

Also, I downgraded it to 2010, I haven't taken the time to install '12 yet, should be a simple upgrade.

[RE9741]

Afraid I'm using 2005, :/ any chance you could downgrade it that far?