Using char with bool

Hi , how would i use char with bool here is the code :

Code:

---

  bool buy = true;
  bool dbuy = false;
   
   
    cout <<"Do you want to buy a can of coke? : " << endl;
    cin >> buy;
   
    if (buy = 'yes')
    {
            cout <<"Bought!" << endl;
            }
            if (dbuy = 'no')
            {
                    cout <<"No sale!" << endl;
                    }

---

You need a string in this case

string buy;
cin >> buy;
if ( buy == "yes" )

where dose the bool come in

Code:

---

string buy = true;
  string dbuy = false;
 
   
   
    cout <<"Do you want to buy a can of coke? : " << endl;
    cin >> buy;
   
    if (buy == 'yes')
    {
            cout <<"Bought!" << endl;
            }
            if (dbuy == 'no')
            {
                    cout <<"No sale!" << endl;
                    }

---

Well that's what comparisons return

As in

bool anAnswer = ( buy == "yes" );

If you look at anAnswer, it will either be true or false.

ok i did it but when i type yes or no it comes up with both answers no sale and bought

Code:

---

 
    bool answer = ( buy == "yes" );
    {
            cout <<"Bought!" << endl;
            }
            bool answer2 = (dbuy == "no");
            {
                    cout <<"No sale!" << endl;
                    }

---

You need to use an if statement at some point. You know, like the one you had minutes ago?

where do i put it

Exactly where you had it before.

Do you know all the basic types in C++? They can all be compared. That means that they can all be used in a Boolean expression, and the explicit use of a bool variable is optional.

yes i know a little still something wrong...

Code:

---

    if bool anAnswer = ( buy == "yes" );
    {
            cout <<"Bought!" << endl;
            }
            else if bool anAnswer2 = ( dbuy == "no" );
            {
                    cout <<"No sale!" << endl;
                    }

---

You need a beginner's book. I'd recommend Accelerated C++.

very helpfull

How did this thread go from (almost) correct to horribly wrong? All you needed to do to use boolean logic was to replace "=" with "==" in the if statement. You could have used temporary variables to hold this value, but either way, you're using boolean. For example:

Code:

---

bool r = (buy == "yes");
if (r) {
    /* do stuff */
}

---

is the same as:

Code:

---

if (buy == "yes") {
    /* do stuff */
}

---

when a comparison in C/C++ is just an expression that evaluates to either zero or one depending on if it's false or true, respectively.

EDIT: Looks like this is just a continuation of your confusion regarding boolean. You should really look for a tutorial on boolean logic and its usage in C before you post more code.

Quote:

---

Originally Posted by memcpy

when a comparison in C/C++ is just an expression that evaluates to either zero or one depending on if it's false or true, respectively.

---

In C++, the comparison would evaluate to false or true, not zero or one. Also, be wary of "C/C++": Stroustrup on "What do you think of C/C++?"