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  #1  
Old August 15th, 2006, 04:53 PM
Kassie Kassie is offline
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Boolean

Cany anyone give me an example of a boolean? And, is there anyway to combine bools and strings?

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  #2  
Old August 15th, 2006, 06:48 PM
ubergeek ubergeek is offline
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A bool is a variable that can have a value of true or false.

C++ Code:
Original - C++ Code
  1.  
  2. bool flag = true;
  3. flag = false;
  4. flag = (1 + 1 == 2); //flag will be true again because, of course, 1+1=2
  5. if (flag)
  6. {
  7.       //do something
  8. }


What do you mean by combine bools and strings?

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  #3  
Old August 15th, 2006, 10:05 PM
Kassie Kassie is offline
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What I mean is there a way to use a bool or an if statement to do the same thing with words and phrases as they normally do with numbers?

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Old August 15th, 2006, 11:42 PM
ubergeek ubergeek is offline
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...I'm still unclear. Why don't you provide a sample code of what you're thinking of doing.

You can compare strings with strcmp()...
C Code:
Original - C Code
  1.  
  2. if (strcmp("equivalent", "equivalent") == 0)
  3. {
  4.       //this will execute
  5. }
  6. if (strcmp("different", "same old same old") == 0)
  7. {
  8.       //this will not
  9. }

...but I don't know if that's what you're getting at.

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  #5  
Old August 16th, 2006, 06:35 PM
Kassie Kassie is offline
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This is a sample of the code that i am making. Its almost like i want to create a conversation between the user and the computer.



#include <iostream>
#include <string>
using namespace std;

int main()
{

string Response;
string Replyhowareyou;
string Replylately;
cout<<"Hello\n";
cin>> Response;
cin.ignore();
cout<<"How are you?\n";
cin>> Replyhowareyou;
cin.ignore();
cout<<"Good, thanks.\n";
cin>> Replylately;
cin.ignore();

string hello;

cout<< "So what have you been up to lately?\n" ;
cin>> hello;
cin.ignore();

return 0;
}


I but i want to add If statements in. But instead of using integers, i want to use words.

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  #6  
Old August 16th, 2006, 09:04 PM
ubergeek ubergeek is offline
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OK, go ahead. Since you're using the C++ string class, you can compare with the == operator, e.g.
C++ Code:
Original - C++ Code
  1.  
  2. string reply = "";
  3. cout << "How are you?" << endl;
  4. getline(cin, reply);
  5. if (reply == "Good, how are you?")
  6. {
  7.     cout << "Good, thanks." << endl;
  8. }
  9. else if (reply == "I'm in a terrible mood.")
  10. {
  11.     cout << "I'm sorry." << endl;
  12. }
  13. else
  14. {
  15.      cout << "Sorry, my rudimentary AI has no idea what you are talking about." << endl;
  16. }

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  #7  
Old August 16th, 2006, 11:46 PM
Kassie Kassie is offline
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Thank you so much, this is awesome!

Now, is there any way for the cin to prompt a response from the cout, instead of the cout always being the one to prompt an imput?

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  #8  
Old August 16th, 2006, 11:57 PM
ubergeek ubergeek is offline
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I'm confused again. cout is for output, cin is for input. Period.

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  #9  
Old August 17th, 2006, 09:52 AM
Kassie Kassie is offline
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Right, but usually in code cout comes first. Is there any way that you can have the user input data (cin) and then prompt a response from the computer. So have cin come before cout in code.

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Old August 17th, 2006, 03:11 PM
ubergeek ubergeek is offline
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Sure, just declare a string variable and put the getline(cin, string_variable) before any cout<< statements. You control cout and cin; there is no defined order.

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  #11  
Old August 17th, 2006, 08:04 PM
Kassie Kassie is offline
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Thanks so much! I really appreciate it!

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