Vector

#include<iostream>
#include<cstring>
using namespace std;
class MyVector{
private:
    int niza[15];
    int broj;
public:
    MyVector(){
        this->broj=0;
    }
    MyVector(int *niza,int broj){
        this->broj=broj;
        for(int i=0;i<broj;i++)
        this->niza[i]=niza[i];
    }
    friend istream& operator>>(istream &i,MyVector &v){
        i>>v.broj;
        for(int k=0;k<v.broj;k++)
            i>>v.niza[k];
        return i;
    }
    friend ostream& operator<<(ostream &o,MyVector &v){
        o<<"<";int i;
        for(i=0;i<v.broj-1;i++)
            o<<v.niza[i]<<",";
        o<<v.niza[i]<<">"<<endl;
        return o;
    }
    MyVector& operator-=(MyVector &v){
    for(int i=0;i<broj;i++)
        niza[i]-=v.niza[i];
      return *this;
    }
    friend int operator*(MyVector &v1,MyVector &v2){
    int suma=0;
        MyVector rez;
        rez.broj=v1.broj;
        for(int i=0;i<v1.broj;i++)
        suma+=v1.niza[i]*v2.niza[i];
        return suma;
    }
    bool operator<=(MyVector &v){
    int suma1=0,suma2=0;
        for(int i=0;i<broj;i++)
            suma1+=niza[i];
        for(int i=0;i<v.broj;i++)
            suma2+=v.niza[i];
        if(suma1<=suma2)
            return true;
        else return false;
    }
    int& operator[](int index) {
    int pom = -1;
    if (index>=0&&index<broj)
        return niza [index];
    else {
        cout << "Index out of bounds" << endl ;
        return pom;
      }
    }
    MyVector& operator--(){
     for(int i=0;i<broj;i++)
        if(niza[i]>0)
         niza[i]--;
         return *this;
    }
    MyVector operator++(int){
        MyVector tmp(*this);
        for(int i=0;i<broj;i++)
        if(niza[i]<0)
        niza[i]++;
        return tmp;
    }
};

int main() {
int n;

cin >> n;
if (n == 1) {
  cout << "Testiranje na operatorite >> i <<" << endl;
  cout << "==============================\n";
  MyVector a;
  MyVector b;
  cin >> a;
  cin >> b;
  cout << a;
  cout << b;
}
else if (n == 2) {
  cout << "Testiranje na operatorot -="<< endl;
  cout << "==============================\n";
  int m;
  int niza[15];
  cin >> m;
  for (int i=0; i < m; ++i){
    cin >> niza[i];
  }
  MyVector a(niza,m);
  for (int i=0; i < m; ++i) {
    cin >> niza[i];
  }
  MyVector b(niza,m);
  a -= b;
  cout << a;
}
else if (n == 3) {
  cout << "Testiranje na operatorot *"<< endl;
  cout << "==============================\n";
  int m;
  int niza[15];
  cin >> m;
  for (int i=0; i < m; ++i){
    cin >> niza[i];
  }
  MyVector a(niza,m);
  for (int i=0; i < m; ++i) {
    cin >> niza[i];
  }
  MyVector b(niza,m);
  cout << a * b;
}
else if (n == 4){
  cout << "Testiranje na operatorot <="<< endl;
  cout << "==============================\n";
  int m;
  int l;
  int niza[15];
  cin >> m;
  for (int i=0; i < m; ++i){
    cin >> niza[i];
  }
  MyVector a(niza,m);
  cin >> l;
  for (int i=0; i < l; ++i) {
    cin >> niza[i];
  }
  MyVector b(niza,l);
  cout << (a <= b);
}
else if (n == 5){
  cout << "Testiranje na operatorot []"<< endl;
  cout << "==============================\n";
  int m;
  int niza[15];
  cin >> m;
  for (int i=0; i < m; ++i){
    cin >> niza[i];
  }
  MyVector a(niza,m);
  for (int i=0; i < m; ++i) {
    cin >> niza[i];
  }
  MyVector b(niza,m);
  cout << a[2];
  cout << endl;
  cout << b[3];
}
else if (n == 6) {
  cout << "Testiranje na operatorot --"<< endl;
  cout << "==============================\n";
  int m;
  int niza[15];
  cin >> m;
  for (int i=0; i < m; ++i){
    cin >> niza[i];
  }
  MyVector a(niza,m);
  --a;
  cout << a;
}
else if (n == 7) {
  cout << "Testiranje na operatorot ++"<< endl;
  cout << "==============================\n";
  int m;
  int niza[15];
  cin >> m;
  for (int i=0; i < m; ++i){
    cin >> niza[i];
  }
  MyVector a(niza,m);
  MyVector b = a++;
  cout << a;
  cout << b;
}
    return 0;
}