"1週間で身に付くC++言語の基本"をといてみた

http://cpp-lang.sevendays-study.com/problem1.html
をといてみた。
1-1

# include <iostream>

using namespace std;

int main()
{
        cout << "C++\n";
        return 0;
}

1-2

# include <iostream>

int main()
{
        std::cout << "prigramming in C++ Language" << std::endl;
        return 0;
}

1-3

# include <iostream>

using namespace std;

int main()
{
    cout << "ONE TWO THREE" << endl << "FOUR FIVE SIX" << endl;
    return 0;
}

1-4

# include <iostream>

using namespace std;

int main()
{
        cout << "数値を入力してください: ";
        int a;
        cin >> a;
        cout << a << "を2倍した数は、10です。" << endl;

    return 0;
}

1-5

# include <iostream>

using namespace std;

int main()
{
        int a[2];
        for (int i = 0; i < 2; i++) {
                cout << i << "つ目の数:";
                cin >> a[i];
        }

        cout << a[0] << "+" << a[1] << "=" << a[0]+a[1] << endl;
        cout << a[0] << "-" << a[1] << "=" << a[0]-a[1] << endl;

    return 0;
}

1-6

# include <iostream>

using namespace std;

int main()
{
        char a[2][256];
        cout << "姓を入力:";
        cin >> a[0];
        cout << "名を入力:";
        cin >> a[1];
        cout << "名前は「" << a[0] << a[1] << "」です。" << endl;

    return 0;
}

1-7

# include <iostream>

using namespace std;
int main(){
    cout << "HelloWorld." << endl;
}