Negating Boolean Values

[Khabz]

Hello guys, I made some research on how to negate a boolean value but none seemed to work.

Ok, so I have the following code:

#include <iostream>


using namespace std;


int main()
{
	bool Turn = true;


	for (int i = 1; i < 11; i++)
	{
		if (Turn = true)
		{
			cout<<"X";
		}
		else if (Turn = false)
		{
			cout<<"O";
		}


	}


	cin.get();
}

As of now the code prints "XXXXXXXXXX". And I want it to print "XOXOXOXOXO", so I tried 2 different things, which did not work:

#include <iostream>


using namespace std;


int main()
{
	bool Turn = true;


	for (int i = 1; i < 11; i++)
	{
		if (Turn = true)
		{
			cout<<"X";
		}
		else if (Turn = false)
		{
			cout<<"O";
		}


		Turn = !Turn;
	}


	cin.get();
}

AND:

#include <iostream>


using namespace std;


int main()
{
	bool Turn = true;


	for (int i = 1; i < 11; i++)
	{
		if (Turn = true)
		{
			cout<<"X";
		}
		else if (Turn = false)
		{
			cout<<"O";
		}


		if (Turn = true)
		{
			Turn = false;
		}
		else if (Turn = false)
		{
			Turn = true;
		}
	}


	cin.get();
}

Ok so I made those changes so that the boolean 'Turn' would change everytime the loop executed. Guess it doesn't work. Can anyone give me a hand?

[jimblumberg]

First you need to learn the difference between the assignment operator= and the comparison operator==. Look at the following snippet:

	for (int i = 1; i < 11; i++)
	{
		if (Turn = true)
		{
			cout<<"X";
		}
		else if (Turn = false)
		{
			cout<<"O";
		}

In this snippet you are using the assignment operator= so every time the loop runs it assigns true to Turn.

Also note you don't need to use the else if(), a simple if is sufficient and you don't even need to use the comparison operator in this if statement.

if(Turn)
{
   // do things.
}
else
{
   // do other things.
}

Jim

[Khabz]

Thanks for the explanation, I tend to mix up "==" and "=" but now I see the difference clearly.
Fixed it now. Double thanks.