Sum of Subset Lab

#include<bits/stdc++.h>
using namespace std;


///int w[]={10, 7, 5, 18, 12, 20, 15};
int w[50];
int x[50];
int m,n;
int countt=0;

class Subset
{
 public:


    void sum_of_sub(int s,int k,int r)
    {
        x[k] = 1;
        if(s+w[k] == m)
        {
            for(int i=0;i<=k;i++)
            {
              ///  cout<<x[i]<<" ";

                /// For Showing the Weight do below
               if(x[i]==1)
                cout<<w[i]<<" ";

            }
                cout<<endl;
        }

        else if (s+w[k]+w[k+1]<=m)
            sum_of_sub(s+w[k],k+1,r-w[k]);

        if((((s+r)-w[k])>=m) &&(s+w[k+1])<=m)
        {
            x[k] = 0;
            sum_of_sub(s,k+1,r-w[k]);
        }
    }

    void sum(int s,int k,int r)
    {
        x[k] = 1;
        if( s + w[k] > m)
        {
            display(k);
        }
        if(s+w[k] == m)
        {
            //display(k);
        }
        else if (s+w[k]<=m && k<n)
            sum(s+w[k],k+1,r-w[k]);
        //cout<<k<<" "<<endl;
        if( k<n )
        {
            x[k] = 0;
            sum(s,k+1,r-w[k]);
        }
    }
    void display(int k)
    {
        for(int i=1;i<=k;i++)
        {
            if( x[i] == 1)
                cout<<w[i]<<" ";
        }
        cout<<endl;
    }


    void five(int s,int k,int r)
    {
        x[k] = 1;
        if(s+w[k] == m && countt<5)
        {
            countt++;
            for(int i=0;i<=k;i++)
            {
               // cout<<x[i]<<" ";

                /// For Showing the Weight do below
               if(x[i]==1)
                cout<<w[i]<<" ";

            }

                cout<<endl;
        }

        else if (s+w[k]+w[k+1]<=m)
            five(s+w[k],k+1,r-w[k]);

        if((((s+r)-w[k])>=m) &&(s+w[k+1])<=m)
        {
            x[k] = 0;
            five(s,k+1,r-w[k]);
        }
    }




};


int main()
{

    Subset obj;
    freopen("in.txt","r",stdin);
    int i=0,total_sum = 0;
    cin>>m;

    while(cin)
    {
        cin>>w[i++];
    }

    for(int j =0;j<i;j++)
        total_sum += w[j];

    obj.five(0,0,total_sum);
    //cout<<countt;

//    cout<<countt;



    return 0;
}