#include <iostream>
#include <vector>
#include <list>
#include <numeric>

template <typename T>
int total(T first, T last) {
    int sum = 0;
    for (T p = first; p != last; ++p) sum += *p;
    return sum;
}

int main() {
    std::vector<int> v{ 1, 2, 3, 4, 5 };
    std::cout << total(v.begin(), v.end()) << std::endl;
    std::cout << std::accumulate(v.begin(), v.end(), 0) << std::endl;

    int a[] = { 1, 2, 3, 4, 5 };
    std::cout << total(std::begin(a), std::end(a)) << std::endl;
    std::cout << std::accumulate(std::begin(a), std::end(a), 0) << std::endl;

    std::list<int> li{ 1, 2, 3, 4, 5 };
    std::cout << total(li.begin(), li.end()) << std::endl;
    std::cout << std::accumulate(li.begin(), li.end(), 0) << std::endl;

    return 0;
}

include<iostream>

using namespace std;
int f() {
static int x = 0;
++x;
return x;
}
int main()
{
cout << f() << endl;
cout << f() << endl;
cout << f() << endl;
}

include<iostream>

using namespace std;

int f() {
int x = 0;
++x;
return x;
}
int main()
{
cout << f() << endl;
cout << f() << endl;
cout << f() << endl;
}

include<iostream>

using namespace std;
int main()
{
int n, divisors;

n = 10;
divisors = 0;
for (int i = 1; i <= n; ++i) {
    if (n % i == 0) ++divisors;
}
cout << n << "の約数の数:" << divisors << endl;

}

include<iostream>

using namespace std;
int add1(int x) {
return x + 1;
}
int main()
{
int result = add1(1);
cout << result << endl;
}

include<iostream>

using namespace std;

void sayHello(int times) {
for (int i = 0; i < times; ++i) {
cout << “Hello, World\n”;
}
}
int main()
{
sayHello(5);
}

include<iostream>

using namespace std;
int main()
{
int i = 0;
do {
cout << “Hello, World\n”;
++i;
} while (i < 5);
}

include<iostream>

using namespace std;

int main()
{
int i = 0;
while(i < 5){
cout << “Hello, World\n”;
i++;
}
}

include<iostream>

include<iomanip>

using namespace std;

int main()
{
const int N = 9;
for (int i = 1; i <= N; ++i) {
for (int j = 1; j <= N; ++j) {
cout << setw(3) << i * j;
}
cout << endl;
}
}