Code for Permutations

[Wappinger]

Hey Guys, I wanted to know the code for Permutations. I don’t mind it whether it may be in any language. If anyone knowing about the code for permutation then please let me know as I wanted it very urgently. As, I said that code can be in any programming language such as C. C++, Java, C# etc… So, please let me know as I am eagerly waiting for the reply.

[Vandam]

#include <string>
#include <iostream>

using namespace std;

void string_permutation( std::string& original, std::string& permutation )
{
    if( original.empty() )
    {
        std::cout<<permutation<<std::endl;
        return;
    }

    for(int i=0;i<original.size();++i)
    {
        std::string orig2 = orig;

        orig2.erase(i,1);

        std::string perm2 = permutation;

        perm2 += original.at(i);

        string_permutation(orig2,perm2);
    } 
}

int main()
{
    std::string orig="QWERT";
    std::string perm;  

    string_permutation(original,permutation);

    cout<<"Done!"<<endl;

    system("Stop");

    return 0;
}

This is an code for Permutations in C++. This will enable you to get the appropriate result. You need to run this code in Turbo C which will give you the appropriate result.

[Wappinger]

Hey thank you I got the result but know I wanted the code for factorial which I have got as assignment in my college. So, please if you have code for permutation and some simple program in C++ then please help me out. If you are having then please post it so that I could submit this assignment. So, please help me out.

[Steyn]

This is the Program to find factorial of number which is C++ code. I think that this is the most simplest code in C++.

#include<iostream.h>
#include<conio.h>
main()
{
    int i,m,fact=1;
    clrscr();
    cout<<”Enter a positive number”;
    cin>>m
     for(i=1;i<=m;++i)
           fact=fact*I;
     cout<<”factorial of given number is   ” << fact;
 }

[Villiers]

This the Program for generation of Fibonacci series 1 1 2 3 5 8 13……. Which is mostly are unable to solve. Thought it seems simple but when you think and code it, its very difficult. I think that you need to have a good technique for coding any program so that you could make it more simple and short.

#include<iostream.h>
#include<conio.h>
main()
{
   int f0 ,f1,f2,i,n;
   cout<<”Enter a  number “;
    cin>>n;
    f0=f1=1;
    cout<< f0 <<”   “<<f1<<”  “;
    for(i=2;i<=n;++i)
         {
          f2=f0+f1;
          cout<<f2<<”   “;
          f0=f1;
          f1=f2;
         }
}