[C++][vaja] Rabim malo pomoči

#include<iostream.h>




void vnos(int tab[])
{
   for (int i=0;i<1;i++)
   {
      cout<<endl;
      cout<<endl;
      cout<<"Vnesi stevilo prevozenih kilometrov:"<<endl;
      cin>>tab[2];
      cout<<"Vnesi povprecno porabo vozila:"<<endl;
      cin>>tab[3];
      cout<<endl;
   }
}



int vsota_porabe_sit(int tab[],int tab_gor[],int &izbor)
{
   int vr;
   vr=(tab_gor[izbor]*tab[2])/tab[3]; // tab_gor mi dela tezave
   return (vr);
}



void reset(int tab[])
{
   for(int i=0;i<3;i++)
   {
      tab[i]=0;
   }
}

   


void meni_goriva(int *izbor)
{
   
   int tab_gor[100];
   tab_gor[1]=250;
   tab_gor[2]=195;
   tab_gor[3]=245;

   
   do
   {
      cout<<"Meni goriva"<<endl;
      cout<<"~~~~~~~~~~~~~~~~~~"<<endl;
      cout<<"0. Izhod v glavni meni"<<endl;
      cout<<"1. Super 100"<<endl;
      cout<<"2. Disel"<<endl;
      cout<<"3. 95 Oktanski!"<<endl;
      cout<<"4. Posodobitev cen"<<endl;
      cout<<"~~~~~~~~~~~~~~~~~~"<<endl;
      cout<<"Izberi gorivo"<<endl;
      cin>>*izbor;
      switch(*izbor)
      {
         case 0:
         break;
         case 1:
            tab_gor[1];
         break;
         case 2:
            tab_gor[2];
         break;
         case 3:
            tab_gor[3];
         break;
      }
   }while(*izbor!=0);
   
}



void meni()
{
   int tab[100];
   int tab_gor[100];
   int N;
   int izbira;
   do
   {
      cout<<"Meni programa:"<<endl;
      cout<<"_____________________"<<endl;
      cout<<endl;
      cout<<"0. Izhod iz programa"<<endl;
      cout<<"1. Vnos podatkov"<<endl;
      cout<<"2. Poraba goriva (v SIT)"<<endl;
      cout<<"3. Reset vnosov"<<endl;
      cout<<"4. Izbira goriva"<<endl;
      cout<<endl;
      cout<<"_____________________"<<endl;
      cout<<"Izberi eno od opcij:"<<endl;
      cout<<endl;
      cin>>izbira;
      switch (izbira)
      {
         case 0:
            exit(0);
         break;
         case 1:
            vnos(tab);
         break;
         case 2:
            cout<<"Porabili ste za "<<vsota_porabe_sit(tab,tab_gor,N)<<" goriva"<<endl;
         break;
         case 3:
            reset(tab);
         break;
         case 4:
            meni_goriva(&N);
         break;
      }
   }while (izbira !=0);
}

   
int main()
{
   meni();
   return 0;
}