C++primer習題4.7比較配列が等しいかどうか

#include <string>
#include <iostream>
#include<vector>
using namespace std;
template<class T>
bool is_equal(T *a, int size_a,T * b, int size_b)
{
  if (size_b !=size_a)
    return false;
  for (int i = 0; i < size_a; ++i)
    if (a[i] != b[i])
       return false;
  return true;
}
int main()
{
	int a[] = {1,2,3,4};
	int b[] = {1,2,3,4};
	cout << is_equal(a,sizeof(a)/sizeof(*a),b,sizeof(b)/sizeof(*b));
}

#include <string>
#include <iostream>
#include<vector>
using namespace std;
template<class T>
bool is_equal(vector<T> a,vector<T> b)
{
  const int size = a.size();
  if (size != b.size())
    return false;
  for (int i = 0; i < size; ++i)
    if (a[i] != b[i])
       return false;
  return true;
}
int main()
{
  vector<int> a,b;
  int temp = 0;
  cout << "input array a: ";
  while (cin >> temp)
     a.push_back(temp);
  cout << "input array b: ";
  cin.clear();
  cin.ignore();
  while (cin >> temp)
	  b.push_back(temp);
  cout << is_equal(a,b);
}