help again

well friends i have to write a program which generates all combination of 1,2,3, plz give me some hints coz i have to submit it 17th jan

How would you methodically generate all the combinations by hand?

Plan it out on paper like laserlight suggested. When you have the correct formular, ( use a calculator if it helps ) then write some puescode.

will u plz give me some example

No, we will not do your homework for you. Give it a try and post your non-working code.

Code:

#include <iostream>

using namespace std;

int main()
{
       cout << "123" << endl;
       cout << "132" << endl;
       cout << "321" << endl;
       cout << "312" << endl;
       cout << "213" << endl;
       cout << "231" << endl;
       
       return 0;
}

lol...

Originally Posted by Sentral

Code:

#include <iostream>

using namespace std;

int main()
{
       cout << "123" << endl;
       cout << "132" << endl;
       cout << "321" << endl;
       cout << "312" << endl;
       cout << "213" << endl;
       cout << "231" << endl;
       
       return 0;
}

lol...

Yup, the manual way is the best way.

*cough* combination, not permutation *cough*

So,

Code:

#include <iostream>

using namespace std;

int main()
{
       cout << "123" << endl;
       cout << "132" << endl;
       cout << "213" << endl;
       cin.get();
       return 0;
}

> plz give me some hints
Well do what laserlight suggested.

Like 123 is
1 + all combinations of 23
2 + all combinations of 13
3 + all combinations of 12

Rinse and repeat with some recursion - should be pretty obvious.

thanx frnd

Originally Posted by laserlight

*cough* combination, not permutation *cough*

Which would mean an answer would be more like this:

Code:

#include <iostream>

using namespace std;

int main()
{
       cout << "" << endl;
       cout << "1" << endl;
       cout << "2" << endl;
       cout << "3" << endl;
       cout << "12" << endl;
       cout << "13" << endl;
       cout << "23" << endl;
       cout << "123" << endl;
}

Of course I doubt he actually meant combination, as he didn't state how many items to pick, only what to pick from.