C / C++ / MFC

#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <string.h>
using namespace std;

class Permutation
{
  private:
    static char s[20];
    int width,l;
  public: 
    void input();
    void compute();
    void recur(char choice[],char final[],int);
};
char Permutation::s[20];

void Permutation::input()                                 
{
  cout<<"Enter the string:";
  gets(s);
  cout<<"Places to arrange:";
  cin>>width;
};

void Permutation::compute()
{
  l=strlen(s);
  char s1[20]; 
  recur(s,s1,0);
}

void Permutation::recur(char choice[],char final[],int p)
{
   int i,j,chk,c=0;
   if(p==width){//base condition
     cout<<"OUT: "<<final;
	 cout<<endl;
	 return;
   }	  
   //setting choice variables
   for(i=0;i<l;i++){>
   	   chk=0;							
       for(j=0;j<strlen(final);j++){>
         
	     	 if(s[i]==final[j])
		       chk=1;
       }
	   if(chk==0){choice[c++]=s[i];}
   }
   choice[c]='\0';
    	  
  //traversing recursion	  
  for(i=0;i<c-1;i++){>
    
	final[p]=choice[i];
	final[p+1]='\0';cout<<"Beforein:\t "<<choice<<" -\t "<<final<<" -\t "<<p+1<<" -\t"<<i+1<<" "<<c<<endl<<endl;
	recur(choice,final,p+1);
	
	cout<<"Returned: \t"<<choice<<" - \t"<<final<<" - \t"<<p+1<<"-\t"<<i+1<<" "<<c<<endl<<endl;
  }	    
}

int main()
{
   Permutation arrange;
   arrange.input();
   arrange.compute();
   getch();
   return 0;
}  

</string.h></stdio.h></conio.h></iostream.h>