Problema Rucsacului

#include <iostream>
using namespace std;
struct obi
{
    int cod,g,c;
    float e,k;
}v[100];

int n,GR;

void citire()
{
    cout<<"n=";cin>>n;
    for(int i=0;i<n;i++)
    {
        v[i].k=0;
        cout<<"v["<<i<<"]=";
        v[i].cod=i;
        cout<<endl<<"Greutatea ob ";cin>>v[i].g;
        cout<<endl<<"Castigul ";cin>>v[i].c;
        v[i].e=(float)v[i].g/v[i].c;
    }
    cout<<"Greutatea maxima ";cin>>GR;
}

void ord()
{
    for(int i=0;i<n-1;i++)
        for(int j=i+1;j<n;j++)
            if(v[i].e>v[j].e)
                swap(v[i],v[j]);
}

void greedy()
{
    int ok=0,i=0;
    while(ok<GR)
    {
        ok+=v[i].g;
        if(ok<=GR)
           v[i].k=1;
        else
            {
                float x=GR-ok+v[i].g;
                v[i].k=x/v[i].g;
                ok+=x;
            }
        i++;
    }
}