std::vector

#ifndef __STDVECTOR__
#define __STDVECTOR__

#include <iostream>

using namespace std;

template <typename T>
    class StdVector{
        private:
            T *buffer;
            unsigned int capacity;
        public:
            //Constructor.
            StdVector(){
                capacity=0;
                buffer=new T[capacity];
            }
            //Copy constructor.
            StdVector(const StdVector &asv){
                int i;

                capacity=asv.getCapacity();
                buffer=new T[asv.getCapacity()];
                for (i=0; i<capacity; i++){
                    buffer[i]=asv[i];
                }
            }
            //Destructor.
            ~StdVector(){
                delete []buffer;
            }
            void push_back(T obj){
                StdVector oldSV(*this);
                int i;

                capacity++;
                delete []buffer;
                buffer=new T[capacity];
                for (i=0; i<oldSV.getCapacity(); i++){
                    buffer[i]=oldSV[i];
                }
                buffer[i]=obj;
            };
            T getBuffer() const{
                if (capacity==0){
                    throw exception();
                }
                return *buffer;
            };
            T &operator[](int index) const{
                if (index>=capacity){
                    //Out of range.
                    throw exception();
                }
                else{
                    return buffer[index];
                }
            }
            StdVector &operator=(const StdVector &obj){
                capacity=obj.getCapacity();
                delete []buffer;
                buffer=new T[capacity];
                buffer=obj.getBuffer();
                return *this;
            }
            unsigned int getCapacity() const{
                return capacity;
            };
    };

#endif

int main(){
    try{
        StdVector<int> test;
        StdVector<string> test2;
        unsigned int i;

        test.push_back(5);
        test.push_back(4);
        test.push_back(3);
        test.push_back(2);
        test.push_back(1);
        test.push_back(0);
        test.push_back(-1);
        test.push_back(-2);
        test.push_back(-3);
        test.push_back(-4);
        test.push_back(-5);
        for (i=0; i<test.getCapacity(); i++){
            cout << test[i] << endl;
        }
        test2.push_back("Hello");
        test2.push_back(" ");
        test2.push_back("World");
        test2.push_back(".");
        cout << "---------------" << endl;
        for (i=0; i<test2.getCapacity(); i++){
            cout << test2[i];
        }
        cout << endl;
    }
    catch(...){
        cout << "Exception." << endl;
    }
    return 0;
}