cpp.cpp

#include <iostream>
#include <map>
#include <string>
#include <vector>

using namespace std;


ostream& operator<<(ostream& out, const pair<const string, int>& kv)
{
    out << kv.first << ":" << kv.second;
    return out;
}

template <class T>
static void inspect_array(T i, T end)
{
    cout << "[";
    for (auto sep = ""; i != end; ++i, sep = ", ")
	cout << sep << *i;
    cout << "]" << endl;
}

int main()
{
    int a[] = {1, 2, 3, 5};
    inspect_array(a, &a[sizeof(a)/sizeof(a[0])]);
    cout << a[2] << endl;	// => 3
    cout << a[4] << endl;	// => 未定義?

    for (auto i = 0; i < sizeof(a)/sizeof(a[0]); ++i)
	cout << a[i] << endl;
    for (auto p = a; p != &a[sizeof(a)/sizeof(a[0])]; ++p)
	cout << *p << endl;

    vector<int> v = {1, 2, 3, 5};
    inspect_array(v.begin(), v.end());
    cout << v[2] << endl;	// => 3
    cout << v[4] << endl;	// => 未定義?

    for (auto i = v.begin(); i != v.end(); ++i)
	cout << *i << endl;

    map<string, int> h = {
	{"matz", 54},
	{"dhh",  40},
    };
    inspect_array(h.begin(), h.end());
    cout << h["matz"]  << endl;	// => 54
    cout << h["linda"] << endl;	// => 未定義?

    for (auto kv = h.begin(); kv != h.end(); ++kv)
	cout << kv->first << ": " << kv->second << endl;

    return 0;
}