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9.0

output all possible combinations of N boolean variables

Asked by substand in C Programming Language

Tags: combinations, possible, c, program

For example, if I have:

int main()
{

     ouputCombos(3);
}

the program should output:

TTT
TTF
TFT
TFF
FTT
FTF
FFT
FFF

I've been able to write a recursive function that basically traverses the "tree", but I think I've just been looking at it too long and can't think of how to get it to remember and actually output the whole line.

Here's what I have so far:

#include <iostream.h>
#include <stdlib.h>

void tf(int n)
{
     if (n<1)  // in case someone puts in something less than one to begin with
     {
        ;
     }
     if (n==1)
     {
        cout << "T" << endl;
        cout << "F" << endl;

     }
     else
     {
        cout << "T" ;
        tf(n-1);
        cout << "F" ;
        tf(n-1);

     }
}

int main()
{     char ch;
      tf(3);
      cin >> ch;

      return 0;
}

I realize the cout and crap is c++, but its just quicker that typing printf and such.

Yes, this is for school, but no its not an assignment.  I'm doing it to try and get back in the swing of things (I was out of school for 1 and a half years) so I'd appreciate any insight.  Solution can be in any language, including pseudo code.
[+][-]01/22/06 02:02 PM, ID: 15762207Accepted Solution

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About this solution

Zone: C Programming Language
Tags: combinations, possible, c, program
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Solution Provided By: Infinity08
Participating Experts: 5
Solution Grade: A
 
[+][-]01/22/06 02:00 PM, ID: 15762197Assisted Solution

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[+][-]01/22/06 02:11 PM, ID: 15762240Expert Comment

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[+][-]01/22/06 02:27 PM, ID: 15762315Assisted Solution

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[+][-]01/22/06 02:31 PM, ID: 15762344Author Comment

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[+][-]01/22/06 02:57 PM, ID: 15762472Expert Comment

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[+][-]01/22/06 10:05 PM, ID: 15763892Expert Comment

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[+][-]01/23/06 12:23 AM, ID: 15764266Expert Comment

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[+][-]01/23/06 12:25 AM, ID: 15764276Expert Comment

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[+][-]01/23/06 01:25 AM, ID: 15764497Assisted Solution

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[+][-]01/23/06 08:58 AM, ID: 15768052Author Comment

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[+][-]01/23/06 11:14 PM, ID: 15773584Assisted Solution

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